Atomic layer deposited molybdenum disulfide on Si photocathodes for highly efficient photoelectrochemical water reduction reaction

2017 ◽  
Vol 5 (7) ◽  
pp. 3304-3310 ◽  
Author(s):  
Seungtaeg Oh ◽  
Jun Beom Kim ◽  
Jun Tae Song ◽  
Jihun Oh ◽  
Soo-Hyun Kim
Keyword(s):  
Atomic Layer Deposition ◽  
Molybdenum Disulfide ◽  
Low Cost ◽  
Atomic Layer ◽  
Reduction Reaction ◽  
Water Reduction ◽  
Noble Metal Catalysts ◽  
Highly Efficient ◽  
Layer Deposition ◽  
Earth Abundant

MoS2 is an earth-abundant and low-cost HER electrocatalyst that can substitute noble metal catalysts. Here, we develop the atomic layer deposition (ALD) of MoS2 nanomaterials on p-Si photocathodes for highly efficient and stable PEC water reduction reactions.

Workfunction of Al-Doped ZnO Films Deposited by Atomic Layer Deposition

2018 ◽  
Author(s):  
Peter George Gordon ◽  
Goran Bacic ◽  
Gregory P. Lopinski ◽  
Sean Thomas Barry
Keyword(s):  
Atomic Layer Deposition ◽  
Atomic Layer ◽  
Atomic Ratio ◽  
Aluminum Concentration ◽  
Zno Films ◽  
Transparent Conductor ◽  
Kelvin Probe ◽  
Layer Deposition ◽  
Earth Abundant ◽  
Doped Zno

Al-doped ZnO (AZO) is a promising earth-abundant alternative to Sn-doped In<sub>2</sub>O<sub>3</sub> (ITO) as an n-type transparent conductor for electronic and photovoltaic devices; AZO is also more straightforward to deposit by atomic layer deposition (ALD). The workfunction of this material is particularly important for the design of optoelectronic devices. We have deposited AZO films with resistivities as low as 1.1 x 10<sup>-3</sup> Ωcm by ALD using the industry-standard precursors trimethylaluminum (TMA), diethylzinc (DEZ), and water at 200<sup>◦</sup>C. These films were transparent and their elemental compositions showed reasonable agreement with the pulse program ratios. The workfunction of these films was measured using a scanning Kelvin Probe (sKP) to investigate the role of aluminum concentration. In addition, the workfunction of AZO films prepared by two different ALD recipes were compared: a “surface” recipe wherein the TMA was pulsed at the top of each repeating AZO stack, and a interlamellar recipe where the TMA pulse was introduced halfway through the stack. As aluminum doping increases, the surface recipe produces films with a consistently higher workfunction as compared to the interlamellar recipe. The resistivity of the surface recipe films show a minimum at a 1:16 Al:Zn atomic ratio and using an interlamellar recipe, minimum resistivity was seen at 1:19. The film thicknesses were characterized by ellipsometry, chemical composition by EDX, and resistivity by four-point probe.<br>

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>

Enhanced Water Purification via Redox Interfaces Created by an Atomic Layer Deposition Strategy

2021 ◽  
Author(s):  
Liming Huang ◽  
Tingting Yan ◽  
Alaa El Din Mahmoud ◽  
Shuangxi Li ◽  
Jianping Zhang ◽  
...  
Keyword(s):  
Atomic Layer Deposition ◽  
Water Purification ◽  
Water Scarcity ◽  
Atomic Layer ◽  
Highly Efficient ◽  
Layer Deposition

The crisis of water scarcity has become one of the most urgent issues to be settled. It is still a challenge to develop a highly efficient water purification technology. In...

Stable and highly efficient Cu/TiO2 nanocomposite photocatalyst prepared through atomic layer deposition

2018 ◽  
Vol 568 ◽  
pp. 168-175 ◽  
Author(s):  
Feng Gao ◽  
Jie Jiang ◽  
Liyong Du ◽  
Xinfang Liu ◽  
Yuqiang Ding
Keyword(s):  
Atomic Layer Deposition ◽  
Atomic Layer ◽  
Highly Efficient ◽  
Layer Deposition

scholarly journals Nanoconfined Atomic Layer Deposition of TiO2/Pt Nanotubes: Toward Ultrasmall Highly Efficient Catalytic Nanorockets

2017 ◽  
Vol 27 (24) ◽  
pp. 1700598 ◽  
Author(s):  
Jinxing Li ◽  
Wenjuan Liu ◽  
Jiyuan Wang ◽  
Isaac Rozen ◽  
Sha He ◽  
...  
Keyword(s):  
Atomic Layer Deposition ◽  
Atomic Layer ◽  
Highly Efficient ◽  
Layer Deposition
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