Synthetic Control over Quantum Well Width Distribution and Carrier Migration in Low-Dimensional Perovskite Photovoltaics

2018 ◽  
Vol 140 (8) ◽  
pp. 2890-2896 ◽  
Author(s):  
Andrew H. Proppe ◽  
Rafael Quintero-Bermudez ◽  
Hairen Tan ◽  
Oleksandr Voznyy ◽  
Shana O. Kelley ◽  
...  
Keyword(s):  
Quantum Well ◽  
Synthetic Control ◽  
Width Distribution ◽  
Quantum Well Width ◽  
Low Dimensional

scholarly journals Dimension control of in situ fabricated CsPbClBr2 nanocrystal films toward efficient blue light-emitting diodes

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Chenhui Wang ◽  
Dengbao Han ◽  
Junhui Wang ◽  
Yingguo Yang ◽  
Xinyue Liu ◽  
...  
Keyword(s):  
Quantum Well ◽  
Light Emitting Diodes ◽  
Blue Emission ◽  
Light Emitting ◽  
Mixed Ligands ◽  
Dimension Control ◽  
Nanocrystal Films ◽  
Width Distribution ◽  
Quantum Well Width

AbstractIn the field of perovskite light-emitting diodes (PeLEDs), the performance of blue emissive electroluminescence devices lags behind the other counterparts due to the lack of fabrication methodology. Herein, we demonstrate the in situ fabrication of CsPbClBr2 nanocrystal films by using mixed ligands of 2-phenylethanamine bromide (PEABr) and 3,3-diphenylpropylamine bromide (DPPABr). PEABr dominates the formation of quasi-two-dimensional perovskites with small-n domains, while DPPABr induces the formation of large-n domains. Strong blue emission at 470 nm with a photoluminescence quantum yield up to 60% was obtained by mixing the two ligands due to the formation of a narrower quantum-well width distribution. Based on such films, efficient blue PeLEDs with a maximum external quantum efficiency of 8.8% were achieved at 473 nm. Furthermore, we illustrate that the use of dual-ligand with respective tendency of forming small-n and large-n domains is a versatile strategy to achieve narrow quantum-well width distribution for photoluminescence enhancement.

Classical Size Effect on In-plane Thermoelectric Transport at Low Dimension

2001 ◽  
Vol 691 ◽  
Author(s):  
W. L. Liu ◽  
G. Chen
Keyword(s):  
Quantum Well ◽  
Size Effect ◽  
Quantum Confinement Effect ◽  
Relaxation Length ◽  
Thermoelectric Transport ◽  
Mixed Regime ◽  
Interface Scattering ◽  
Quantum Well Width ◽  
Low Dimensional ◽  
Classical Size

ABSTRACTPrevious models on low-dimensional thermoelectric investigation deal with the quasi twodimensional electron transport due to quantum confinement effect. The formation of sub-bands in quantum well requires that electron wave reflections or transmissions at the interface are strictly in the specular direction and the superimposed wave function keeps phase coherence. However, due to the interface non-ideality or roughness, electrons can lose coherence such that their transport will deviate from that described by two-dimensional quantum well limit theories. In this paper, we report a theoretical approach to investigate the classical size effect on in-plane thermoelectric transport at low dimensions. A theoretical model based on Boltzmann equation is established with interface scattering treated as partial specular and partial diffuse scattering boundary condition. With the infinite quantum well assumption, the classical size effect in the quantum-classical mixed regime is quantitatively demonstrated. Factors that affecting classical size effect, such as quantum well width and relaxation length, are discussed.

Synthetic Control on Structure/Dimensionality and Photophysical Properties of Low Dimensional Organic Lead Bromide Perovskite

2018 ◽  
Vol 57 (21) ◽  
pp. 13443-13452 ◽  
Author(s):  
Muhammed P. U. Haris ◽  
Rangarajan Bakthavatsalam ◽  
Samir Shaikh ◽  
Bhushan P. Kore ◽  
Dhanashree Moghe ◽  
...  
Keyword(s):  
Photophysical Properties ◽  
Synthetic Control ◽  
Lead Bromide ◽  
Organic Lead ◽  
Low Dimensional

scholarly journals Внутризонное поглощение излучения дырками в квантовых ямах InAsSb/AlSb и InGaAsP/InP

2018 ◽  
Vol 52 (2) ◽  
pp. 207
Author(s):  
Н.В. Павлов ◽  
Г.Г. Зегря ◽  
А.Г. Зегря ◽  
В.Е. Бугров
Keyword(s):  
Quantum Well ◽  
Quantum Wells ◽  
Incident Radiation ◽  
Radiation Absorption ◽  
Hole Density ◽  
Internal Radiation ◽  
Radiation Losses ◽  
Semiconductor Quantum Wells ◽  
Quantum Well Width ◽  
Split Band

AbstractMicroscopic analysis of intraband radiation absorption by holes with their transition to the spin-split band for InAsSb/AlSb and InGaAsP/InP semiconductor quantum wells is performed in the context of the four-band Kane model. The calculation is performed for two incident-radiation polarizations: along the crystal-growth axis and in the quantum-well plane. It is demonstrated that absorption with transition to the discrete spectrum of spin-split holes has a higher intensity than absorption with transitions to the continuous spectrum. The dependences of the intraband absorption coefficient on temperature, hole density, and quantum- well width are thoroughly analyzed. It is shown that intraband radiation absorption can be the main mechanism of internal radiation losses in lasers based on quantum wells.

Influence of quantum-well width on device performance of Al/sub 0.30/Ga/sub 0.70/As/In/sub 0.25/Ga/sub 0.75/As (on GaAs) MODFETs

1989 ◽  
Vol 36 (5) ◽  
pp. 833-838 ◽  
Author(s):  
L.D. Nguyen ◽  
D.C. Radulescu ◽  
M.C. Foisy ◽  
P.J. Tasker ◽  
L.F. Eastman
Keyword(s):  
Quantum Well ◽  
Device Performance ◽  
Quantum Well Width

Dependence of the binding energy of A(+) centers on quantum-well width in GaAs/AlGaAs structures

2003 ◽  
Vol 37 (9) ◽  
pp. 1090-1092 ◽  
Author(s):  
Yu. L. Ivanov ◽  
P. V. Petrov ◽  
A. A. Tonkikh ◽  
G. É. Tsyrlin ◽  
V. M. Ustinov
Keyword(s):  
Binding Energy ◽  
Quantum Well ◽  
Quantum Well Width
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