Size dependence of surface optical mode and electron–phonon coupling in ZnO nanocombs

2012 ◽  
Vol 407 (17) ◽  
pp. 3510-3514 ◽  
Author(s):  
Donghua Fan ◽  
Rong Zhang ◽  
Yufu Zhu ◽  
Huiren Peng
Keyword(s):  
Size Dependence ◽  
Phonon Coupling ◽  
Optical Mode ◽  
Surface Optical ◽  
Electron Phonon Coupling

Low temperature photoluminescence properties of CsPbBr3 quantum dots embedded in glasses

2017 ◽  
Vol 19 (26) ◽  
pp. 17349-17355 ◽  
Author(s):  
Bing Ai ◽  
Chao Liu ◽  
Zhao Deng ◽  
Jing Wang ◽  
Jianjun Han ◽  
...  
Keyword(s):  
Activation Energy ◽  
Quantum Dots ◽  
Thermal Expansion ◽  
Low Temperature ◽  
Size Dependence ◽  
Phonon Coupling ◽  
Photoluminescence Properties ◽  
Electron Phonon Coupling ◽  
Cspbbr3 Quantum Dots ◽  
Low Temperature Photoluminescence

Size dependence of exciton activation energy, electron–phonon coupling strength, and thermal expansion of the bandgap of CsPbBr3 QDs were studied.

Size dependence of the electronic structures and electron-phonon coupling in ZnO quantum dots

2007 ◽  
Vol 91 (26) ◽  
pp. 262101 ◽  
Author(s):  
S. C. Ray ◽  
Y. Low ◽  
H. M. Tsai ◽  
C. W. Pao ◽  
J. W. Chiou ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Electronic Structures ◽  
Size Dependence ◽  
Phonon Coupling ◽  
Electron Phonon Coupling ◽  
Zno Quantum Dots

Size dependence of electron-phonon coupling in semiconductor nanospheres: The case of CdSe

1990 ◽  
Vol 42 (17) ◽  
pp. 11123-11132 ◽  
Author(s):  
M. C. Klein ◽  
F. Hache ◽  
D. Ricard ◽  
C. Flytzanis
Keyword(s):  
Size Dependence ◽  
Phonon Coupling ◽  
Electron Phonon Coupling

Size-dependence of the effective electron-phonon energy relaxation in hollow gold nanospheres

2014 ◽  
Vol 22 (1) ◽  
Author(s):  
Y. Fan ◽  
J. Li ◽  
H. Chen ◽  
X. Lu ◽  
X. Liu
Keyword(s):  
Size Dependence ◽  
Energy Relaxation ◽  
Noble Metal Nanoparticles ◽  
Coupling Constant ◽  
Phonon Coupling ◽  
Gold Nanospheres ◽  
Effective Electron ◽  
Hollow Gold Nanospheres ◽  
Electron Phonon Coupling ◽  
Experimental Values

AbstractIn this paper the size-dependence of energy relaxation, which is induced by the electron-phonon (e-ph) interactions and the electron-surface (e-s) interactions in noble metal nanoparticles, is investigated. Then based on the analysis and the derivation of the e-s coupling constant in metal nanospheres, the formula of the effective electron-phonon coupling constant Geff of hollow gold nanospheres (HGNs) is deduced. Moreover, the correctness of the formulae gets proved by contrast analyses of the calculated Geff values and experimental values obtained from literature.

Non-adiabaticity in palladium hydride and deuteride

1978 ◽  
Vol 56 (5) ◽  
pp. 522-525 ◽  
Author(s):  
J. S. Brown
Keyword(s):  
Phonon Dispersion ◽  
Phonon Coupling ◽  
Optical Mode ◽  
Palladium Hydride ◽  
Electronic Screening ◽  
Electron Phonon Coupling ◽  
Optical Modes ◽  
Oppenheimer Approximation ◽  
Recent Formulation ◽  
Static Screening

We report the results of estimates of the breakdown of the Born–Oppenheimer approximation for the optical mode vibrations in PdHx and PdDx, using a recent formulation of the threshold for breakdown. Estimates are given of the degree of adiabaticity in these alloys as a function of the H(D) concentration x. We point out the result that for concentrations x for which the d-band has filled, the Born–Oppenheimer approximation may break down slightly, and there may be smaller corrections to static screening for lower concentrations. The estimate suggests that frequency-dependent electronic screening effects may not be totally negligible in a detailed treatment of the phonon dispersion of optical modes in these alloys, and other properties which may be affected by the electron–phonon coupling.

Observation of Core Phonon in Electron–Phonon Coupling in Au25 Nanoclusters

2021 ◽  
Vol 12 (6) ◽  
pp. 1690-1695
Author(s):  
Zhongyu Liu ◽  
Yingwei Li ◽  
Wonyong Shin ◽  
Rongchao Jin
Keyword(s):  
Phonon Coupling ◽  
Electron Phonon Coupling

scholarly journals Electron-phonon coupling in the magnetic Weyl semimetal ZrCo2Sn

2021 ◽  
Vol 103 (2) ◽  
Author(s):  
I.Yu. Sklyadneva ◽  
R. Heid ◽  
P. M. Echenique ◽  
E. V. Chulkov
Keyword(s):  
Phonon Coupling ◽  
Weyl Semimetal ◽  
Electron Phonon Coupling

scholarly journals Dielectric screening in perovskite photovoltaics

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Rui Su ◽  
Zhaojian Xu ◽  
Jiang Wu ◽  
Deying Luo ◽  
Qin Hu ◽  
...  
Keyword(s):  
Open Circuit Voltage ◽  
Low Voltage ◽  
Power Conversion ◽  
Surface Recombination ◽  
Open Circuit ◽  
Phonon Coupling ◽  
Electron Phonon Coupling ◽  
Dielectric Screening ◽  
Perovskite Photovoltaic ◽  
Reduced Surface

AbstractThe performance of perovskite photovoltaics is fundamentally impeded by the presence of undesirable defects that contribute to non-radiative losses within the devices. Although mitigating these losses has been extensively reported by numerous passivation strategies, a detailed understanding of loss origins within the devices remains elusive. Here, we demonstrate that the defect capturing probability estimated by the capture cross-section is decreased by varying the dielectric response, producing the dielectric screening effect in the perovskite. The resulting perovskites also show reduced surface recombination and a weaker electron-phonon coupling. All of these boost the power conversion efficiency to 22.3% for an inverted perovskite photovoltaic device with a high open-circuit voltage of 1.25 V and a low voltage deficit of 0.37 V (a bandgap ~1.62 eV). Our results provide not only an in-depth understanding of the carrier capture processes in perovskites, but also a promising pathway for realizing highly efficient devices via dielectric regulation.

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