ライフサイエンスコーパス: exciton

1 ation and subsequent dynamics of a polaronic exciton.

2 abolicity and the influence of the continuum exciton.

3 precedes formation of the pentacene triplet excitons.

4 n no direct experimental probe of these dark excitons.

5 in-0 singlet exciton into two spin-1 triplet excitons.

6 le absorbed photon into two distinct triplet excitons.

7 olar cells are limited by the confinement of excitons.

8 for C-excitons, in comparison with band-edge excitons.

9 diative recombination of spin-forbidden dark excitons.

10 esonant interaction of the plasmons with the excitons.

11 o a monolayer of WSe2, hosting highly stable excitons.

12 articles or a gas of composite bosons called excitons.

13 rial resulting in the quantum confinement of excitons.

14 are consistent with dark neutral and charged excitons.

15 act free carrier generation from dissociated excitons.

16 In addition, our calculations identify the exciton absorption bands in transient absorption spectra

17 The generation and transfer of triplet excitons across semiconductor nanomaterial-molecular int

18 Efficient transfer of triplet excitons across this interface allows photons to be dire

19 sis of exciton complexes that both a neutral exciton and a trion increases with decreasing WS2 film t

20 ty shows that the DBMP is composed of a dark exciton and about 60 DBSs.

21 We discuss how these exciton and carrier dynamics are controlled by their str

22 their electronic structures and dynamics of exciton and carrier transport and interfacial transfer.

23 more than 500 fs, and (ii) coherence between exciton and charge-transfer states, the reactant and pro

24 hich to trigger dual laser emission based on exciton and polariton.

25 by the model for coherence times between the exciton and the photocurrent producing states of 20 fs o

26 weak electronic coupling between the singlet exciton and triplet pair states.

27 rly assume that the ground states of charged excitons and biexcitons in these monolayers are also dar

28 the thermodynamic fission-fusion balance of excitons and electron-hole plasma can be efficiently tun

29 er recombination arising from strongly bound excitons and low carrier mobility.

30 Strong light matter coupling between excitons and microcavity photons, as described in the fr

31 or quasi-particles composed of semiconductor excitons and microcavity photons-directly couple exciton

32 The different electronic character of excitons and mobile charge is discussed, the former bein

33 3OH on TiO2(110) by highlighting the role of excitons and showing that adsorbed CH3OH may also be an

34 method for resolving the diffusion length of excitons and the extraction yield of charge carriers is

35 ongly correlated many-body states, including excitons and trions, that dominate the optical propertie

36 due to the new composite (polaron) formed by excitons and vibrons.

37 otype device, the qubit is the confined dark exciton, and it produces strings of hundreds of photons

38 d stoichiometry, size-dependent plasmons and excitons, and charge transfer from semiconductors to mol

39 oulomb-bound electron and hole pairs, called excitons, and unbound charge carriers is a key cross-cut

40 pectroscopy, TA can detect even non-emissive excitons, and we register an order of magnitude enhancem

41 These molecular excitons are a direct result of exceptionally densely pa

42 Because of their long lifetimes, these dark excitons are appealing candidates for quantum computing

43 Excitons are bosons that have been predicted to condense

44 e energy transfer includes the fact that the excitons are delocalized over a few neighboring sites, b

45 levels for both the neutral and charged dark excitons are obtained and compared with ab initio calcul

46 nsition metal dichalcogenide semiconductors, excitons are particularly important even at room tempera

47 rum of indium selenide shows the direct free exciton at 1.3 eV and several other peaks, which do not

48 d electronic states and electron-hole pairs (excitons) at molecular interfaces and address interactio

49 energy difference between the Frenkel and CT exciton bands.

50 owever, in most cases their relatively small exciton binding energies limit their operation temperatu

51 osed that exciton delocalization reduces the exciton binding energy and promotes exciton dissociation

52 one can tune the electronic bandgap and the exciton binding energy in monolayers of WS2 and WSe2 by

53 featuring strong photoluminescence and large exciton binding energy.

54 %, accompanied by a twofold reduction in the exciton binding energy.

55 gth reaching hundreds of microns; (ii) a low exciton binding energy; and (iii) a high optical absorpt

56 and holes in the molecular bridge, so-called exciton-binding.

57 confinement in nanoparticles larger than the exciton Bohr radius.

58 n of a triangular quantum well and localized excitons by electrostatic coupling.

59 states evolve with a complex co-existence of excitons, carriers and phonons, where a delayed buildup

60 A "dynamic exciton charge model" is developed to elucidate the unde

61 Accordingly, the exciton chirality model with excitons localized on the a

62 ation of the expansion of a valley-polarized exciton cloud over several micrometers.

63 impossible with monolayers due to the large exciton coherence size, but resolve clear anti-crossings

64 We find from the analysis of exciton complexes that both a neutral exciton and a trio

65 tallization of the valence electrons into an exciton condensate.

66 Our study provides compelling evidence for exciton condensation in a three-dimensional solid and es

67 from topological magnetoelectric effects to exciton condensation.

68 reedom (spin and pseudospin), confinement of excitons, control of the electronic and optical properti

69 ated by an exciton-surface plasmon polariton-exciton conversion mechanism, allowing cascaded exciton

70 ated by an exciton-surface-plasmon-polariton-exciton conversion mechanism.

71 F process, including the significant role of exciton correlations in promoting triplet pair generatio

72 ield induces a large splitting of the valley excitons, corresponding to a g-factor of about 20.

73 Excitons, Coulomb-bound electron-hole pairs, are element

74 Here we demonstrate SWCNT excitons coupled to plasmonic nanocavity arrays reaching

75 ion due to the large proportion of localised excitons coupled with delocalised excitons from interclu

76 tra-O-substituted resorcin[4]arenes, the ECD exciton couplet at longer wavelength depends on the chir

77 h theoretical calculations of donor-acceptor exciton coupling was employed to estimate ET rate and ef

78 m mechanical effects like charge-transfer or exciton-coupling, are included.

79 of size-, shape-, and composition-dependent exciton decay dynamics and photoinduced energy transfer

80 Recently, it has been proposed that exciton delocalization reduces the exciton binding energ

81 hemistry, in particular, dipolar ligands and exciton-delocalizing ligands, on their electronic energi

82 constants leads to almost 50% lower triplet exciton densities in the emissive layer in the steady st

83 he development of novel strategies to reduce exciton densities under heavy load is therefore highly d

84 ue to strong Coulomb interaction and a large exciton density of states.

85 t offers encouraging prospects for realistic exciton devices at room temperature.

86 These direct measurements provide exciton diffusion constants of 3-6 cm(2) s(-1) for the t

87 Here we report a direct visualization of exciton diffusion in tubular molecular aggregates by tra

88 separation in both blends, with PffBT4T-2OD exciton diffusion kinetics within polymer domains, and g

89 The extracted exciton diffusion lengths are found to be similar to tho

90 ing energy levels of the materials involved, exciton diffusion, and other considerations.

91 How tightly bound charge transfer (CT) excitons dissociate at organic donor-acceptor interfaces

92 elix, and the C60 cage that facilitates SWNT exciton dissociation and electron transfer to the PCBM m

93 y provides key information to understand the exciton dissociation mechanism and to design nanostructu

94 strategy is executed to further promote the exciton dissociation or light harvesting ability of thes

95 poly(9,9-dioctylfluorene) backbone promotes exciton dissociation within the poly(N-decanyl-2,7-carba

96 uces the exciton binding energy and promotes exciton dissociation.

97 c resonances--called quasiparticles--such as excitons, dropletons, polarons and Cooper pairs.

98 ch allow us to study the spatial dynamics of excitons during the iSF process, including the significa

99 We report the modulation of emission energy, exciton dynamics and lasing properties in a single buckl

100 Exciton dynamics governs energy transfer and charge gene

101 ) excitons remains an understudied subset of exciton dynamics in molecular thin films.

102 na, and discuss the current understanding of exciton dynamics in these and related systems.

103 The exciton dynamics including all the processes are strongl

104 al capabilities for probing and manipulating exciton dynamics of atomically thin materials, thus open

105 able absorption spectra and strongly coupled exciton dynamics present in natural light-harvesting sys

106 The enhanced exciton emission intensity can be further tuned by varyi

107 partitioning between band-edge and "trapped" exciton emission.

108 -oxide-semiconductor structure and show that exciton energy transfer can be extended to tens of micro

109 iton conversion mechanism, allowing cascaded exciton energy transfer from one transition metal dichal

110 ng integrated photonic and plasmonic devices.Exciton energy transfer in monolayer transition metal di

111 monolayer transition metal dichalcogenides, exciton energy transfer is typically limited to a short

112 We find that the exciton energy transfer range can be extended to tens of

113 ese vibrational modes effectively weaken the exciton-environment interaction, due to the new composit

114 The multidimensional view on how CT excitons evolve in time, space, and energy provides key

115 hole plasma, the exciton lasing generated by exciton-exciton scattering and the polariton lasing gene

116 heir spin configuration, the brightened dark excitons exhibit much-increased emission and valley life

117 20-65 meV, d = 1.6-4.4 nm) that derives from exciton fine structure and exciton-phonon coupling rathe

118 it fast and efficient intramolecular singlet exciton fission (iSF).

119 Singlet exciton fission (SF) in organic chromophore assemblies r

120 Singlet exciton fission (SF), the conversion of one spin-singlet

121 onic applications, such as water photolysis, exciton fission and novel photovoltaics involving low-di

122 organic semiconductors that undergo singlet exciton fission to reveal the photophysical properties o

123 ly driven process requiring an interface for exciton fission.

124 Triplet excitons form in quasi-2D hybrid inorganic-organic perov

125 rrow spectral range near the bandedge due to exciton formation.

126 ss section, such that the different types of exciton found in organic materials (Frenkel) and inorgan

127 fied here, comprising of neutral and charged excitons from different valleys, offer new opportunities

128 localised excitons coupled with delocalised excitons from intercluster energy transfer.

129 The successful translation of triplet excitons from semiconductor nanoparticles to the bulk so

130 electroluminescence efficiency by harvesting excitons from triplet states, is used as a host in LECs.

131 tructures improve on prospects for nonlinear exciton functionalities by at least 10(4), while retaini

132 Singlet fission (SF), an efficient multiple exciton generation (MEG) process in organic semiconducto

133 esponsible for device functionality, such as exciton generation and charge separation, are insufficie

134 Finally, we discuss the impact of CT exciton generation on charge-carrier transport and on th

135 sion (SF), a promising mechanism of multiple exciton generation, has only recently been engineered as

136 to the reduction of recombination losses for excitons gradually transferred into MoS2 under quasi-res

137 and in hypercubes for the disordered Frenkel-exciton Hamiltonian under pure dephasing noise.

138 almost always achieved through parametrized exciton Hamiltonians that necessarily introduce biases a

139 Here we probe exciton harvesting in both luminescent and dark material

140 usters of a few pigments sharing delocalized excitons has been challenged by ultrafast optical spectr

141 Triplet excitons have been the focus of considerable attention w

142 ss in which one photon generates two triplet excitons, holds great technological promise.

143 Combined with Monte Carlo exciton hopping simulations, we show that migration in t

144 ndgap transition and brightening of the dark exciton in bilayer and monolayer WSe2, respectively.

145 onstrate hybridization between tightly bound excitons in a MoSe2 monolayer and excitons in GaAs quant

146 Here, we report the observation of excitons in bilayer graphene (BLG) using photocurrent sp

147 htly bound excitons in a MoSe2 monolayer and excitons in GaAs quantum wells via coupling to a cavity

148 derstanding the confinement and transport of excitons in low dimensional systems will aid the develop

149 Here, we show that laterally-confined excitons in monolayer MoS2 nanodots can be created throu

150 n-plane magnetic field can brighten the dark excitons in monolayer WSe2 and permit their properties t

151 to study near-infrared absorption spectra of excitons in oligomers of the ubiquitous conjugated polym

152 and non-thermal regimes of valley-polarized excitons in perpendicular magnetic fields.

153 ed by an organo-metallic array and molecular excitons in the form of J-aggregates dispersed on the hy

154 material (CdS) promoting the localization of excitons in the shell domain, as was confirmed by ultraf

155 diated hybridization of GaAs and J-aggregate excitons in the strong coupling regime under electrical

156 ed and quench subsequently generated singlet excitons in their vicinity.

157 nal plane, enabling direct detection of dark excitons in TMD monolayers.

158 the conduction band edges, the lowest-lying excitons in WX2 (X = S, Se) are expected to be spin-forb

159 to explore the confinement and transport of excitons in zero-dimensional metal-organic hybrid materi

160 10) surfaces in an aqueous medium to the O3s exciton, in line with the proposal based on experiments,

161 we report a slower hot-carrier cooling for C-excitons, in comparison with band-edge excitons.

162 We identify the extra kinetic energy of the exciton (independent of whether it is neutral or charged

163 o demonstrate that (i) coherence between the excitons initiating the two different charge separation

164 he unique ability to control surface plasmon/exciton interactions within such superlattice microcavit

165 pin-conserving fission of one spin-0 singlet exciton into two spin-1 triplet excitons.

166 es provide a direct pathway for dissociating excitons into longer-lived free carriers that substantia

167 Dark excitons involve nominally spin-forbidden optical transi

168 l potential landscape engineering with local exciton ionization to control the scattering dynamics un

169 ing WS2 film thickness; however, the neutral exciton is predominant in single-layer WS2.

170 n inversion of the electron-hole plasma, the exciton lasing generated by exciton-exciton scattering a

171 ion threshold, bringing it to the sub-single-exciton level.

172 ron-phonon interaction, resulting in a short exciton lifetime in the MoS2 /GaN heterostructure.

173 Shorter triplet exciton lifetimes are observed, while high photoluminesc

174 Here, it is shown that triplet exciton lifetimes of thermally activated delayed-fluores

175 Furthermore, the measured ultra-narrow exciton linewidth (18 mueV) reaches the radiative lifeti

176 ccordingly, the exciton chirality model with excitons localized on the arene scaffold, here generaliz

177 e correlation of local material structure to exciton migration character, applicable not only to phot

178 rs but also to explaining the quintessential exciton migration exhibited in photosynthesis.

179 hown which can serve as models of charge and exciton migration in organic semiconductors.

180 solution, thus characterizing spatiotemporal exciton migration on its native nanometre and picosecond

181 Measuring exciton migration, however, has been challenging because

182 uently implicated as promoting or inhibiting exciton mobility in such systems.

183 A disordered exciton model based on the structure of the main plant l

184 The Frenkel exciton model, with its set of electronically coupled tw

185 center is commonly rationalized in terms of excitons moving on a grid of biomolecular chromophores o

186 These excitons obey optical selection rules distinct from thos

187 calculations shows that the spin-orbital dd excitons of the Fe(2+) sites arise from a tetragonal Jah

188 ion of the electron-hole pairs, intra-valley excitons of TMD monolayers can be either optically brigh

189 light emitting characteristics and enormous exciton oscillator strength, however, their low charge c

190 ough coupling of the antenna-tip to the dark exciton out-of-plane optical dipole moment, with a large

191 Usually, the exciton phase is associated with low temperatures.

192 that derives from exciton fine structure and exciton-phonon coupling rather than broadening caused by

193 ogenic temperatures in a unique interplay of excitons, phonons, and plasmons at the nanoscale.

194 onstrate 6 x 10(5)-fold enhancement in dark exciton photoluminescence quantum yield achieved through

195 se findings open up opportunities to explore exciton physics with pseudospin texture in electrically

196 Hot exciton PL and time-resolved PL measurements show that v

197 ising for photonic applications due to their exciton-plasmon interactions.

198 in a non-standard Bose-Hubbard model for an exciton- polariton Josephson junction (JJ) that is chara

199 We investigate the dynamics of an exciton-polariton condensate which emerges in semiconduc

200 Additionally, in exciton-polariton condensates there is a variety of dyna

201 , which can disturb the flow and dynamics of exciton-polariton condensates.

202 We show that exciton-polariton fluid in a nontrivial topological phas

203 onstrate thermalization of SWCNT polaritons, exciton-polariton pumping rates approximately 10(4) time

204 n perylene emerges, including evidence of an exciton-polariton stopband, as well as an assessment of

205 tational force acting on a massive particle: exciton-polariton.

206 Microcavity exciton polaritons are promising candidates to build a n

207 ribe the energy and k-vector distribution of exciton-polaritons along the hybrid modes by a thermodyn

208 Exciton-polaritons are hybrid light-matter particles tha

209 Exciton-polaritons are quasiparticles consisting of a li

210 r to realize efficient electrical pumping of exciton-polaritons at room temperature with high current

211 ong coupling and facilitates condensation of exciton-polaritons at room temperature, which may lead t

212 zation dynamics of ballistically propagating exciton-polaritons has been developed.

213 enides have been reported, but well resolved exciton-polaritons have yet to be achieved.

214 The pseudospin dynamics of long-living exciton-polaritons in a wedged 2D cavity has been studie

215 Exciton-polaritons in semiconductor microcavities form a

216 ve such a transition in a short-lived gas of exciton-polaritons, bosonic light-matter particles in se

217 A hybrid polariton state with distinct excitons provides a potential technological route toward

218 published attribution of the sub-nanosecond exciton radiative lifetime in nanoprecipitates of CsPbBr

219 of conduction band edges makes ground state excitons radiatively inactive (dark) due to spin and mom

220 The process of exciton recombination is thus inextricably tied to photo

221 Then, this delocalized CT exciton relaxes in energy to produce CT states with delo

222 gration of weakly and non-luminescent (dark) excitons remains an understudied subset of exciton dynam

223 airs in the band nesting region denoted as C-excitons, remains elusive.

224 retical description of the time-evolution of excitons requires, as an initial step, the calculation o

225 and is related to the strength of the direct exciton resonance A and B of the few layer 2H-MoS2 affec

226 that are spectrally matched to the A-valley exciton resonance of a MoSe2 monolayer.

227 ichalcogenides region supporting high-energy exciton resonance to a different transition metal dichal

228 the lateral heterostructure with low-energy exciton resonance.

229 ible light and decrease the recombination of excitons, respectively.

230 is critical to resolve the evolution of the exciton's binding energy and coherent size with femtosec

231 rption of a photon usually creates a singlet exciton (S1) in molecular systems, but in some cases S1

232 ion (SF), the conversion of one spin-singlet exciton (S1) into two spin-triplet excitons (T1), could

233 ies results in the conversion of one singlet exciton (S1) into two triplet excitons (T1), provided th

234 the observation of these effects by studying exciton satellites in photoemission and tunneling spectr

235 ownward dispersion predicted within the spin-exciton scenario.

236 t one-dimensional systems are favourable for exciton self-trapping to produce highly efficient below-

237 s to minimize the length scales required for exciton separation and carrier collection is therefore a

238 and geminate recombination losses following exciton separation being identified as key factors deter

239 in determining the fundamental parameters of excitons (size, binding energy, spin, dimensionality and

240 ng diminishes dramatically, while long-range exciton-SP coupling takes place much faster (>6.5 ns) th

241 ant PL enhancement mainly through long-range exciton-SP coupling.

242 The calculations confirm that the exciton spectral features in MEH-PPV overlap with those

243 We created interlayer exciton spin-valley polarization by means of circularly

244 regates absorb a photon to produce a singlet exciton, spin-allowed singlet fission may produce two tr

245 tons and microcavity photons-directly couple exciton spins and photon polarizations, combining the ad

246 an upper bound of the lifetime of the upper exciton state directly from the HB experiments in agreem

247 the initial hot-carrier extraction for the C-exciton state with an unprecedented efficiency of 80%, a

248 t effects play a role, despite the fact that exciton states near the band bottom crucial for transpor

249 hotoexcited states generated by self-trapped excitons (STEs) from structural distortion.

250 ttributed mainly to the role of self-trapped excitons (STEs).

251 with a direct bandgap feature tightly bound excitons, strong spin-orbit coupling and spin-valley deg

252 ased light harvesting applications using the exciton-surface plasmon coupling.

253 crons in the hybrid structure mediated by an exciton-surface plasmon polariton-exciton conversion mec

254 extended to tens of microns, mediated by an exciton-surface-plasmon-polariton-exciton conversion mec

255 n-singlet exciton (S1) into two spin-triplet excitons (T1), could provide a means to overcome the Sho

256 of one singlet exciton (S1) into two triplet excitons (T1), provided that the overall process is exoe

257 xcitation (e.g., 266 nm) from an interfacial exciton that undergoes O-H dissociation.

258 This results in relatively weakly bound excitons that are ideal for reducing protons.

259 ith four embedded GaAs quantum wells hosting excitons that are spectrally matched to the A-valley exc

260 ed in the organic layers forms tightly bound excitons that are split into free electrons and holes us

261 owed singlet fission may produce two triplet excitons that can be used to generate two electron-hole

262 tic-impurity-driven condensation of the spin excitons that form inside the unconventional superconduc

263 Excitons, the bound states of an electron and a hole in

264 re strongly bound by Coulomb interactions or excitons, the photophysics of thin films made of Ruddles

265 plified or multiple energy transfer based on exciton theory and Forster resonance energy transfer are

266 nstrate the inadequacy of a standard Frenkel exciton theory of the DAPI-DNA interactions.

267 -triplet multiexcitons and uncoupled triplet excitons through singlet fission.

268 ased light harvesting relies on transport of excitons to charge-transfer sites.

269 band-gap, leading to efficient funnelling of excitons towards isolated strain-tuned quantum emitters

270 Exciton transfer from the blue nanocrystals to the orang

271 chroism, superradiance, and fast delocalized exciton transfer, consistent with our quantum dynamics p

272 conditions, including a bleach of the first exciton transition and the appearance of a quantum-confi

273 We find that to bleach the first exciton transition by an average of 1 carrier per QD req

274 indings imply that the CD strength of the QD exciton transition(s) may be used as a predictor for the

275 e filling induced bleaching of interband and exciton transitions curiously more than doubles.

276 Slow and fast bath dynamics, along with exciton transport between the pigments, are included.

277 he mechanisms and main parameters underlying exciton transport in large molecular assemblies.

278 ne of the challenges for achieving efficient exciton transport in solar energy conversion systems is

279 n experimental tool to directly characterize exciton transport in space and in time to elucidate mech

280 Long-range exciton transport is a key challenge in achieving effici

281 ovide the potential for attaining long-range exciton transport through strong intermolecular coupling

282 Facile exciton transport within ordered assemblies of pi-stacke

283 Unlike excitons, trions can radiatively decay with non-zero mom

284 part Wannier-Mott, and in which the dominant exciton type can be switched with an applied voltage.

285 iers and phonons, where a delayed buildup of excitons under on- and off-resonant pumping conditions a

286 Only the stable phase forms charge-transfer excitons upon exposure to visible light as indicated by

287 Dissociation of the exciton via the charge-transfer (CT) states is attribute

288 atios are observed for the two lowest-energy exciton-vibrational bands, enabling assignment of the re

289 olding of the even-membered macrocycles into exciton-vibrational coupled dimer pairs in aromatic solv

290 ormations that give rise to solvent-specific exciton-vibrational couplings in UV-vis absorption spect

291 ling from the overlap between the dopant and exciton wave functions of the host lattice.

292 The effects of virtual bridge excitons were neglected in earlier treatments.

293 photoexcitation is assigned to localized hot excitons which dissociate to free carriers.

294 low because the path associated with the O2s exciton, which is the most favored one thermodynamically

295 We briefly discuss harvesting of triplet excitons, which now attracts substantial interest when u

296 ve identified a species derived from the O2s exciton with an activated O2s-Ti bond that may be releva

297 the interface first populates delocalized CT excitons with a coherent size of 4 nm.

298 ones, largely due to their intrinsic Frenkel excitons with high binding energy.

299 in the 2D limit leads to optically prominent excitons with large binding energy, with these polariton

300 SE06), treating the excited-state species as excitons with triplet multiplicity.

301 In contrast, dark excitons (XD) show anti-parallel spin configuration with