Contribution of radial dopant concentration to the thermoelectric properties of core-shell nanowires

2013 ◽  
Vol 102 (10) ◽  
pp. 103101 ◽  
Author(s):  
Julio A. Martinez ◽  
Jeong-Hyun Cho ◽  
Xiaohua Liu ◽  
Ting S. Luk ◽  
Jianyu Huang ◽  
...  
Keyword(s):  
Thermoelectric Properties ◽  
Dopant Concentration ◽  
Core Shell ◽  
Shell Nanowires

scholarly journals Quantum‐Confinement‐Enhanced Thermoelectric Properties in Modulation‐Doped GaAs–AlGaAs Core–Shell Nanowires

2019 ◽  
Vol 32 (4) ◽  
pp. 1905458 ◽  
Author(s):  
Sergej Fust ◽  
Anton Faustmann ◽  
Damon J. Carrad ◽  
Jochen Bissinger ◽  
Bernhard Loitsch ◽  
...  
Keyword(s):  
Thermoelectric Properties ◽  
Quantum Confinement ◽  
Core Shell ◽  
Shell Nanowires

scholarly journals Enhanced thermoelectric properties in Sb/Ge core/shell nanowires through vacancy modulation

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Prabal Dev Bhuyan ◽  
P. N. Gajjar ◽  
Rita Magri ◽  
Sanjeev K. Gupta
Keyword(s):  
Electronic Structure ◽  
Thermoelectric Properties ◽  
Conversion Efficiency ◽  
Figure Of Merit ◽  
Formation Energy ◽  
Energy Conversion Efficiency ◽  
Core Shell ◽  
Thermoelectric Energy ◽  
The Stability ◽  
Shell Nanowires

AbstractIn the present work, we have modified the physical and electronic structure of Sb/Ge core/shell nanowires via vacancy creation and doping with foreign atoms with the aim to improve their thermoelectric energy conversion efficiency. Sb/Ge-NWs having a diameter of 1.5 Å show metallicity with 2Go quantum conductance. The stability of the nanowires is assessed through the calculation of their formation energy. The formation of one vacancy at either the Sb- and Ge-site modifies substantially the electronic properties. From the comparison of the thermoelectric properties of the nanowires with and without the vacancy, we have found that the figure of merit for the Sb/Ge NW with one Sb vacancy increases of 0.18 compared to the pristine NW. The NW doping with different transition metals: Fe, Co, Ni and Cu have been found to also enhance the conversion efficiency. Thus, our calculations show that the thermoelectric performance of metal–semiconductor core–shell NWs can be in principle improved as much as 80% by vacancy formation and doping.

One-Dimensional TiO2@GaON Core-Shell Nanowires with Controlled Shell Thickness from Atomic Layer Deposition for Stable and Efficient Photoelectrochemical Water Splitting

2019 ◽  
Author(s):  
Jiajia Tao ◽  
Hong-Ping Ma ◽  
Kaiping Yuan ◽  
Yang Gu ◽  
Jianwei Lian ◽  
...  
Keyword(s):  
Atomic Layer Deposition ◽  
Band Gap ◽  
Water Splitting ◽  
Atomic Layer ◽  
Photoelectrochemical Water Splitting ◽  
Core Shell ◽  
Photoelectrochemical Performance ◽  
Highly Efficient ◽  
Layer Deposition ◽  
Shell Nanowires

<div>As a promising oxygen evolution reaction semiconductor, TiO2 has been extensively investigated for solar photoelectrochemical water splitting. Here, a highly efficient and stable strategy for rationally preparing GaON cocatalysts on TiO2 by atomic layer deposition is demonstrated, which we show significantly enhances the</div><div>photoelectrochemical performance compared to TiO2-based photoanodes. For TiO2@20 nm-GaON core-shell nanowires a photocurrent density up to 1.10 mA cm-2 (1.23 V vs RHE) under AM 1.5 G irradiation (100 mW cm-2) has been achieved, which is 14 times higher than that of TiO2 NWs. Furthermore, the oxygen vacancy formation on GaON as well as the band gap matching with TiO2 not only provides more active sites for water oxidation but also enhances light absorption to promote interfacial charge separation and migration. Density functional theory studies of model systems of GaON-modified TiO2 confirm the band gap reduction, high reducibility and ability to activate water. The highly efficient and stable systems of TiO2@GaON core-shell nanowires provide a deeper understanding and universal strategy for enhancing photoelectrochemical performance of photoanodes now available. </div>

scholarly journals Broadband Meta‐Absorber with Au/Ni Core–Shell Nanowires for Solar Vapor Generator

2021 ◽  
Vol 5 (7) ◽  
pp. 2100185
Author(s):  
Soomin Son ◽  
Jaemin Park ◽  
Sucheol Ju ◽  
Daihong Huh ◽  
Junho Jun ◽  
...  
Keyword(s):  
Core Shell ◽  
Vapor Generator ◽  
Shell Nanowires

scholarly journals Effect of dopant concentration and the role of ZnS shell on optical properties of Sm3+ doped CdS quantum dots

RSC Advances ◽  
2021 ◽  
Vol 11 (14) ◽  
pp. 7961-7971
Author(s):  
N. D. Vinh ◽  
P. M. Tan ◽  
P. V. Do ◽  
S. Bharti ◽  
V. X. Hoa ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Optical Properties ◽  
Dopant Concentration ◽  
Core Shell ◽  
Cds Quantum Dots ◽  
Cds Qds

The role of samarium (Sm) dopant on the structural, morphological, and optical properties of CdS QDs and CdS/ZnS core/shell QDs was methodically reported.

scholarly journals Correlated optical and structural analyses of individual GaAsP/GaP core–shell nanowires

2019 ◽  
Vol 30 (30) ◽  
pp. 304001 ◽  
Author(s):  
C Himwas ◽  
S Collin ◽  
H-L Chen ◽  
G Patriarche ◽  
F Oehler ◽  
...  
Keyword(s):  
Core Shell ◽  
Shell Nanowires

scholarly journals Gate length dependent transport properties of in-plane core-shell nanowires with raised contacts

Nano Research ◽  
2019 ◽  
Vol 13 (1) ◽  
pp. 61-66
Author(s):  
Alexandre Bucamp ◽  
Christophe Coinon ◽  
David Troadec ◽  
Sylvie Lepilliet ◽  
Gilles Patriarche ◽  
...  
Keyword(s):  
Transport Properties ◽  
Core Shell ◽  
Gate Length ◽  
Dependent Transport ◽  
Shell Nanowires
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