[PDF] Top 20 Exciton-Exciton Annihilation in Two-dimensional Halide Perovskites at Room Temperature

... low dimensional (PEA) 2 (CH 3 NH 3 ) n1 Pb n I 3n+1 (n=1, 2, 3 and 4) crystals at room temperature in a large range of excitation ...ns. At high uence, defects are being pro- ... Voir le document complet

... In a photovoltaic (PV) device, the conversion efficiency of solar radiation into electrical power is ...paramount. In 1961, Shockley and Queisser established the theoretical efficiency limit of an ideal ... Voir le document complet

... annealed at 100 °C for 5 min, the samples are stored in a nitrogen- filled glove box before further ...measured in the near infrared (NIR) regime were always first measured at 500 nm to obtain ... Voir le document complet

... produce in the disordered phase (here above 265 K) any softening of the elastic constants [36] ...44 at high temperature is due to an indepen- dent tendency towards a ferroelastic instability, which ... Voir le document complet

... summarized in Table 3. The optical absorption spectra are typical of 2D perovskites, with a high-energy absorption edge and a low-energy excitonic ...behavior at room temperature, ... Voir le document complet

... resulting in many-body interactions and large exciton binding energies at room temperature (5–9, 13, ...the exciton binding energies as a function of n ...of exciton ... Voir le document complet

... of halide perovskite materials and devices. Halide perovskites have undeniably remarkable characteristics, which are interesting for next-generation ...tails in the absorption spectrum. ... Voir le document complet

... photoexcitations in CH 3 NH 3 PbBr 3 even beyond the densities at which, in the Mott scenario, the e–h plasma is expected to ...before in other classes of direct-gap semi- conductors. ... Voir le document complet

... ground-state exciton- polariton fluid behaves like a nonequilibrium coolant for its host solid-state semiconductor ...cryostat temperature of 50 K and below where optical cooling is usually suppressed, and ... Voir le document complet

... exemplified in Figure 4. These show slightly larger spatial extents, in good agreement with the corresponding quantities in Table ...shown in Figures ...densities. In particular, we ... Voir le document complet

... here in which β = ...average exciton transfer rate when the ordered system has poor donor-acceptor spectral overlap, in which case disorder serves to facilitate energetic resonance between some ... Voir le document complet

... form two sets of numerical ...the two-mode approximation ...shown in Fig. 3 (parame- ters are given in the ...intensity in the system composed of a cir- cular pillar with 2 output ... Voir le document complet

... Discussion In conclusion, we report the generation and control of valley coherent exciton-polaritons in a WSe 2 monolayer embedded in a ...the exciton LT-split- ting, arising from the ... Voir le document complet

... holes in semiconductors ...[10–19], in which time- reversal symmetry and the lack of space inversion sym- metry lock the valley and spin degrees of freedom [20, ...valley in which the optical ... Voir le document complet

... into exciton in-plane propagation and trapping can be obtained from the spectrally integrated emission intensity maps shown in ...shown in Fig. 2. Two main features can be distinguished ... Voir le document complet

... discussed in the previous sections have been interpreted on the basis of free exciton recombina- tion though the PL emission lines are clearly inhomogeneously broadened [FWHM ∼10 meV at T = 4 K; see ... Voir le document complet

... photoelectrons. In a classical picture, the photoemission process can be described as a three-step process, occurring almost ...contribution in the captured (photo)electron distribution curve ... Voir le document complet

... prepared in two steps starting from commercial diphenylamine. In the first step, lithium diphenylamide was allowed to react with stoichiometric amounts of propargyl bromide, in THF, at ... Voir le document complet

... and exciton resonances generate hybridized energy states, called plexcitons, which may result in unusual light-matter ...dip in the visible spectra of colloidal suspensions containing silver ... Voir le document complet

... peak in the population transfer is rather sharp, as opposed to the broad peak observed for white ...the exciton system with the vibration appears at ω≈8J. Thus, the two maxima in the ... Voir le document complet