Improving the photoelectrochemical performance of spin-coated WO3/BiVO4/ZnO photoanodes by maximizing charge transfer using an optimized ZnO decoration layer

2021 ◽  
Author(s):  
Junhyuk Ji ◽  
Pankyu Sang ◽  
Jung Hyeun Kim
Keyword(s):  
Charge Transfer ◽  
Photoelectrochemical Performance

scholarly journals Complete surface coverage of ZnO nanorod arrays by pulsed electrodeposited CuInS2 for visible light energy conversion

2015 ◽  
Vol 44 (16) ◽  
pp. 7127-7130 ◽  
Author(s):  
Yiming Tang ◽  
Jung-Ho Yun ◽  
Lianzhou Wang ◽  
Rose Amal ◽  
Yun Hau Ng
Keyword(s):  
Charge Transfer ◽  
Visible Light ◽  
Surface Coverage ◽  
Zno Nanorods ◽  
Zno Nanorod ◽  
Nanorod Arrays ◽  
Zno Nanorod Arrays ◽  
Photoelectrochemical Performance ◽  
Pulsed Electrodeposition ◽  
Light Energy Conversion

Photosensitized ZnO nanorods uniformly coated with CuInS2 nanoparticles from sequentially pulsed-electrodeposition yielded superior charge transfer ability and great enhancement in photoelectrochemical performance under visible light irradiation.

scholarly journals Multi-Leg TiO2 Nanotube Photoelectrodes Modified by Platinized Cyanographene with Enhanced Photoelectrochemical Performance

Catalysts ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 717 ◽  
Author(s):  
Mahdi Shahrezaei ◽  
Seyyed Mohammad Hossein Hejazi ◽  
Yalavarthi Rambabu ◽  
Miroslav Vavrecka ◽  
Aristides Bakandritsos ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Recombination Rate ◽  
Electrochemical Impedance ◽  
Charge Transfer Resistance ◽  
Open Circuit ◽  
Transfer Time ◽  
Photoelectrochemical Performance ◽  
Transfer Resistance ◽  
Photocurrent Spectroscopy ◽  
Photogenerated Electrons

Highly ordered multi-leg TiO2 nanotubes (MLTNTs) functionalized with platinized cyanographene are proposed as a hybrid photoelectrode for enhanced photoelectrochemical water splitting. The platinized cyanographene and cyanographene/MLTNTs composite yielded photocurrent densities 1.66 and 1.25 times higher than those of the pristine MLTNTs nanotubes, respectively. Open circuit VOC decay (VOCD), electrochemical impedance spectroscopy (EIS), and intensity-modulated photocurrent spectroscopy (IMPS) analyses were performed to study the recombination rate, charge transfer characteristics, and transfer time of photogenerated electrons, respectively. According to the VOCD and IMPS results, the addition of (platinized) cynographene decreased the recombination rate and the transfer time of photogenerated electrons by one order of magnitude. Furthermore, EIS results showed that the (platinized) cyanographene MLTNTs composite has the lowest charge transfer resistance and therefore the highest photoelectrochemical performance.

scholarly journals Insight into the charge transfer in particulate Ta3N5photoanode with high photoelectrochemical performance

2016 ◽  
Vol 7 (7) ◽  
pp. 4391-4399 ◽  
Author(s):  
Zhiliang Wang ◽  
Yu Qi ◽  
Chunmei Ding ◽  
Dayong Fan ◽  
Guiji Liu ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Water Oxidation ◽  
Photoelectrochemical Performance ◽  
High Efficient ◽  
Insight Into ◽  
Photoelectrochemical Water Oxidation

Charge transfer has been demonstrated to have a fundamental role in particulate Ta3N5electrode for achieving high efficient photoelectrochemical water oxidation.

scholarly journals Chemically Bonded N-PDI-P/WO3 Organic-Inorganic Heterojunction with Improved Photoelectrochemical Performance

Catalysts ◽  
2020 ◽  
Vol 10 (1) ◽  
pp. 122
Author(s):  
Cheng Feng ◽  
Xihong Mi ◽  
Dingwen Zhong ◽  
Weiming Zhang ◽  
Yongping Liu ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Organic Semiconductors ◽  
Water Oxidation ◽  
High Performance ◽  
Film Surface ◽  
Photogenerated Electron ◽  
Photocurrent Density ◽  
Light Illumination ◽  
Photoelectrochemical Performance ◽  
Highest Occupied Molecular Orbital

The chemical bonding of bandgap adjustable organic semiconductors with inorganic semiconducting materials is effective in constructing a high-performance heterogeneous photoanode. In this study, a new asymmetric perylene diimide derivative molecule (N-PDI-P) was synthesized by connecting tert-butoxycarbonyl on an N-site at one end of a PDI molecule through methylene and connecting naphthalene directly onto the other end. This molecule was bonded onto the WO3 film surface, thereby forming the photoanode of organic-inorganic heterojunction. Under light illumination, the photocurrent density of chemically bonded N-PDI-P/WO3 heterojunction was twofold higher than that of physically adhered heterojunction for photoelectrochemical water oxidation at 0.6 V (vs. Ag/AgCl). Energy band structure and charge transfer dynamic analyses revealed that photogenerated electron carriers on the highest occupied molecular orbital (HOMO) of an N-PDI-P molecule can be transferred to the conduction band of WO3. The charge transfer and separation rates were accelerated considerably after the chemical bond formed at the N-PDI-P/WO3 interface. The proposed method provides a new way for the design and construction of organic-inorganic composite heterojunction.

Improved charge transfer and photoelectrochemical performance of CuI/Sb 2 S 3 /TiO 2 heterostructure nanotube arrays

2016 ◽  
Vol 464 ◽  
pp. 1-9 ◽  
Author(s):  
Feng Yang ◽  
Jinfang Xi ◽  
Li-Yong Gan ◽  
Yushu Wang ◽  
Shuangwei Lu ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Nanotube Arrays ◽  
Photoelectrochemical Performance

A synergistic approach to enhance the photoelectrochemical performance of carbon dots for molecular imprinting sensors

Nanoscale ◽  
2019 ◽  
Vol 11 (16) ◽  
pp. 7885-7892 ◽  
Author(s):  
Lebao Mao ◽  
Xinyi Wang ◽  
Yun Guo ◽  
Linli Yao ◽  
Xiaojie Xue ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Energy Level ◽  
Molecular Imprinting ◽  
Light Absorption ◽  
Carbon Dots ◽  
Transfer Efficiency ◽  
Photoelectrochemical Performance ◽  
Interfacial Contact ◽  
Synergistic Approach

Rightly adjusting the energy level; optimization of intimate interfacial contact; extension of the light absorption range; and enhancement of charge-transfer efficiency.

scholarly journals Improved Photoelectrochemical Performance of MoS2 through Morphology-Controlled Chemical Vapor Deposition Growth on Graphene

Nanomaterials ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 1585
Author(s):  
Dong-Bum Seo ◽  
Tran Nam Trung ◽  
Sung-Su Bae ◽  
Eui-Tae Kim
Keyword(s):  
Chemical Vapor Deposition ◽  
Charge Transfer ◽  
Vapor Deposition ◽  
Graphene Layer ◽  
Chemical Vapor ◽  
Full Potential ◽  
Mos2 Nanosheets ◽  
Photoelectrochemical Performance ◽  
Chemical Vapor Deposition Growth ◽  
Vertically Aligned

The morphology of MoS2 nanostructures was manipulated from thin films to vertically aligned few-layer nanosheets on graphene, in a controllable and practical manner, using metalorganic chemical vapor deposition. The effects of graphene layer and MoS2 morphology on photoelectrochemical (PEC) performance were systematically studied on the basis of electronic structure and transitions, carrier dynamic behavior, and PEC measurements. The heterojunction quality of the graphene/vertical few-layer MoS2 nanosheets was ensured by low-temperature growth at 250−300 °C, resulting in significantly improved charge transfer properties. As a result, the PEC photocurrent density and photoconversion efficiency of the few-layer MoS2 nanosheets significantly increased upon the insertion of a graphene layer. Among the graphene/MoS2 samples, the few-layer MoS2 nanosheet samples exhibited shorter carrier lifetimes and smaller charge transfer resistances than the thin film samples, suggesting that vertically aligned nanosheets provide highly conductive edges as an efficient pathway for photo-generated carriers and have better electronic contact with graphene. In addition, the height of vertical MoS2 nanosheets on graphene should be controlled within the carrier diffusion length (~200 nm) to achieve the optimal PEC performance. These results can be utilized effectively to exploit the full potential of two-dimensional MoS2 for various PEC applications.

Sign in / Sign up

Export Citation Format

Share Document