scholarly journals Positive onset potential and stability of Cu2O-based photocathodes in water splitting by atomic layer deposition of a Ga2O3buffer layer

2015 ◽  
Vol 8 (5) ◽  
pp. 1493-1500 ◽  
Author(s):  
Changli Li ◽  
Takashi Hisatomi ◽  
Osamu Watanabe ◽  
Mamiko Nakabayashi ◽  
Naoya Shibata ◽  
...  
Keyword(s):  
Atomic Layer Deposition ◽  
Water Splitting ◽  
Energy Band ◽  
Deposition Temperature ◽  
Atomic Layer ◽  
Band Alignment ◽  
Onset Potential ◽  
Layer Deposition

The improved energy band alignment of Pt/TiO2/Ga2O3/Cu2O structure results in a positive onset potential of ∼1 Vvs.RHE and a stable cathodic photocurrent under appropriate TiO2deposition temperature.

scholarly journals Atomic layer deposition triggered Fe-In-S cluster and gradient energy band in ZnInS photoanode for improved oxygen evolution reaction

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Linxing Meng ◽  
Jinlu He ◽  
Xiaolong Zhou ◽  
Kaimo Deng ◽  
Weiwei Xu ◽  
...  
Keyword(s):  
Atomic Layer Deposition ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Energy Band ◽  
High Performance ◽  
Carrier Transport ◽  
Atomic Layer ◽  
Onset Potential ◽  
Layer Deposition ◽  
Gradient Energy

AbstractVast bulk recombination of photo-generated carriers and sluggish surface oxygen evolution reaction (OER) kinetics severely hinder the development of photoelectrochemical water splitting. Herein, through constructing a vertically ordered ZnInS nanosheet array with an interior gradient energy band as photoanode, the bulk recombination of photogenerated carriers decreases greatly. We use the atomic layer deposition technology to introduce Fe-In-S clusters into the surface of photoanode. First-principles calculations and comprehensive characterizations indicate that these clusters effectively lower the electrochemical reaction barrier on the photoanode surface and promote the surface OER reaction kinetics through precisely affecting the second and third steps (forming processes of O* and OOH*) of the four-electron reaction. As a result, the optimal photoanode exhibits the high performance with a significantly enhanced photocurrent of 5.35 mA cm−2 at 1.23 VRHE and onset potential of 0.09 VRHE. Present results demonstrate a robust platform for controllable surface modification, nanofabrication, and carrier transport.

Interfacial study and energy-band alignment of annealed Al2O3 films prepared by atomic layer deposition on 4H-SiC

2013 ◽  
Vol 113 (4) ◽  
pp. 044112 ◽  
Author(s):  
Feng Zhang ◽  
Guosheng Sun ◽  
Liu Zheng ◽  
Shengbei Liu ◽  
Bin Liu ◽  
...  
Keyword(s):  
Atomic Layer Deposition ◽  
Energy Band ◽  
Atomic Layer ◽  
Band Alignment ◽  
Layer Deposition ◽  
Al2o3 Films

Energy-band alignment of Al2O3 and HfAlO gate dielectrics deposited by atomic layer deposition on 4H–SiC

2010 ◽  
Vol 96 (4) ◽  
pp. 042903 ◽  
Author(s):  
Rahul Suri ◽  
Casey J. Kirkpatrick ◽  
Daniel J. Lichtenwalner ◽  
Veena Misra
Keyword(s):  
Atomic Layer Deposition ◽  
Energy Band ◽  
Gate Dielectrics ◽  
Atomic Layer ◽  
Band Alignment ◽  
Layer Deposition

Energy-band alignment of (HfO 2 ) x (Al 2 O 3 ) 1-x gate dielectrics deposited by atomic layer deposition on β-Ga 2 O 3 (-201)

2018 ◽  
Vol 433 ◽  
pp. 530-534 ◽  
Author(s):  
Lei Yuan ◽  
Hongpeng Zhang ◽  
Renxu Jia ◽  
Lixin Guo ◽  
Yimen Zhang ◽  
...  
Keyword(s):  
Atomic Layer Deposition ◽  
Energy Band ◽  
Gate Dielectrics ◽  
Atomic Layer ◽  
Band Alignment ◽  
Layer Deposition

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>

Sign in / Sign up

Export Citation Format

Share Document