Piezoelectric polarization assisted WO3/CdS photoanode improved carrier separation efficiency via CdS phase regulation

2021 ◽  
Author(s):  
Quanyou Zhao ◽  
Zhifeng Liu ◽  
Junwei Li ◽  
Weiguo Yan ◽  
Jing Ya ◽  
...  
Keyword(s):  
Separation Efficiency ◽  
Piezoelectric Polarization ◽  
Phase Regulation ◽  
Carrier Separation

Photogenerated-carrier separation along edge dislocation of WO3single-crystal nanoflower photoanode

2018 ◽  
Vol 6 (18) ◽  
pp. 8604-8611 ◽  
Author(s):  
Yuyu Bu ◽  
Jun Ren ◽  
Huawei Zhang ◽  
Dongjiang Yang ◽  
Zhuoyuan Chen ◽  
...  
Keyword(s):  
Edge Dislocation ◽  
Separation Efficiency ◽  
Photogenerated Carrier ◽  
Crystal Face ◽  
Carrier Separation

Edge dislocation on WO3nanosheet can induce a crystal face heterojunction system to promote the separation efficiency of photogenerated carrier.

A solar-to-chemical conversion efficiency up to 0.26% achieved in ambient conditions

2021 ◽  
Vol 118 (46) ◽  
pp. e2115666118
Author(s):  
Yu-Xin Ye ◽  
Jinhui Pan ◽  
Yong Shen ◽  
Minhui Shen ◽  
Huijie Yan ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Charge Carrier ◽  
Separation Efficiency ◽  
Biomass Conversion ◽  
Chemical Conversion ◽  
Electron Acceptors ◽  
Ambient Conditions ◽  
Reduction Efficiency ◽  
Earth Abundant ◽  
Carrier Separation

Artificial photosynthesis in ambient conditions is much less efficient than the solar-to-biomass conversion (SBC) processes in nature. Here, we successfully mimic the NADP-mediated photosynthetic processes in green plants by introducing redox moieties as the electron acceptors in the present conjugated polymeric photocatalyst. The current artificial process substantially promotes the charge carrier separation efficiency and the oxygen reduction efficiency, achieving a photosynthesis rate for converting Earth-abundant water and oxygen in air into hydrogen peroxide as high as 909 μmol⋅g−1⋅h−1 and a solar-to-chemical conversion (SCC) efficiency up to 0.26%. The SCC efficiency is more than two times higher than the average SBC efficiency in nature (0.1%) and the highest value under ambient conditions. This study presents a strategy for efficient SCC in the future.

Enhanced photocatalytic hydrogen production from aqueous-phase methanol reforming over cyano-carboxylic bifunctionally-modified carbon nitride

2019 ◽  
Vol 55 (83) ◽  
pp. 12503-12506 ◽  
Author(s):  
Hao Tan ◽  
Peng Kong ◽  
Meixian Liu ◽  
Xianmo Gu ◽  
Zhanfeng Zheng
Keyword(s):  
Hydrogen Production ◽  
Active Sites ◽  
Carbon Nitride ◽  
Separation Efficiency ◽  
Promising Candidate ◽  
Methanol Reforming ◽  
Metal Free ◽  
Carrier Separation ◽  
Polymeric Carbon ◽  
Low Activity

Polymeric carbon nitride is a promising candidate for metal-free photocatalysis, but it is hampered by low activity due to poor carrier separation efficiency and lack of active sites.

g-C3N4 nanoparticle@porous g-C3N4 composite photocatalytic materials with significantly enhanced photo-generated carrier separation efficiency

2020 ◽  
Vol 35 (16) ◽  
pp. 2148-2157
Author(s):  
Qianhong Shen ◽  
Chengyan Wu ◽  
Zengyu You ◽  
Feilong Huang ◽  
Jiansong Sheng ◽  
...  
Keyword(s):  
Separation Efficiency ◽  
Carrier Separation ◽  
Image Position ◽  
Photocatalytic Materials

Abstract

scholarly journals Nonuniform Effect of Carrier Separation Efficiency and Light Absorption in Type-II Perovskite Nanowire Solar Cells

2017 ◽  
Vol 12 (1) ◽  
Author(s):  
Weiping Wang ◽  
Jialun He ◽  
Yiyan Cao ◽  
Lijing Kong ◽  
Xuanli Zheng ◽  
...  
Keyword(s):  
Solar Cells ◽  
Light Absorption ◽  
Separation Efficiency ◽  
Type Ii ◽  
Carrier Separation

scholarly journals Gradient engineered light absorption layer for enhanced carrier separation efficiency in perovskite solar cells

2020 ◽  
Author(s):  
Gaozhu Wu ◽  
Qing Zhu ◽  
Teng Zhang ◽  
Ziqi Zou ◽  
Weiping Wang ◽  
...  
Keyword(s):  
Solar Cells ◽  
Band Structure ◽  
Light Absorption ◽  
Separation Efficiency ◽  
Perovskite Solar Cells ◽  
Thermal Evaporation Method ◽  
Absorption Layer ◽  
Perovskite Materials ◽  
High Efficient ◽  
Carrier Separation

Abstract Carrier transport behavior in perovskite light absorption layer significantly impacts the performance of perovskite solar cells (PSCs). In this work, reduced carrier recombination losses were achieved by the design of band structure in perovskite materials. An ultrathin (PbI 2 /PbBr 2 ) n film with a gradient thickness ratio was deposited as the lead halide precursor layer by thermal evaporation method, and PSCs with a gradient band structure in perovskite absorption layer were fabricated by a two-step method in ambient atmosphere. For comparison, PSCs with homogeneous perovskite materials of MAPbI 3 and MAPbI x Br 3-x were fabricated as well. It is found that the gradient type-II band structure greatly reduces the carrier lifetime and enhances the carrier separation efficiency. As a result, the PSCs with a gradient band structure exhibit an average power conversion efficiency of 17.5%, which is 1-2% higher than that of traditional PSCs. This work provides a novel method for developing high-efficient PSCs.

TiO2nanoparticles and CQDs co-decorated mesoporous g-C3N4and their photocatalytic properties for gaseous benzene degradation

2019 ◽  
Vol 12 (06) ◽  
pp. 1950086 ◽  
Author(s):  
Chunxia Zhao ◽  
Heng Jia ◽  
Wei Jin ◽  
Feng Li ◽  
Hang Li ◽  
...  
Keyword(s):  
Separation Efficiency ◽  
Carbon Quantum Dots ◽  
Reaction Rate Constant ◽  
Order Kinetic ◽  
Kinetic Reaction ◽  
First Order ◽  
Benzene Degradation ◽  
Visible Light Range ◽  
Carrier Separation ◽  
Gaseous Benzene

Mesoporous g-C3N4is prepared by a hard template method and is then decorated by carbon quantum dots (CQDs) and TiO2nanoparticles through an impregnation route followed by a hydrothermal method. The synthesized hybrids possess higher specific surface area up to 131[Formula: see text]cm2/g and show effective absorption of visible light range and improved instantaneous photocurrent response, which reveals the enhanced photo-generated carrier separation efficiency. The first-order kinetic reaction rate constant of photocatalytic degradation of gaseous benzene by TCPCN-2 is 5.5 times of the bulk g-C3N4. Its degradation rate is up to 96.08% with good photocatalytic stability. Thus, the TiO2nanoparticles and CQDs co-decorated g-C3N4hybrids are promising photocatalysts.

Boosting charge carrier separation efficiency by constructing an intramolecular DA system towards efficient photoreduction of CO2

2021 ◽  
Vol 45 (13) ◽  
pp. 6042-6052
Author(s):  
Xinyu Zhang ◽  
Mei Wang ◽  
Xianghai Song ◽  
Yongsheng Yan ◽  
Pengwei Huo ◽  
...  
Keyword(s):  
Charge Carrier ◽  
Separation Efficiency ◽  
Photocatalytic Reduction ◽  
Recombination Process ◽  
Donor And Acceptor ◽  
Carrier Separation

The charge carrier excitation–recombination process between the donor and acceptor, and the photocatalytic reduction of CO2 to CO over CN based DA composites.

Sign in / Sign up

Export Citation Format

Share Document