研究目的
Investigating the effects of heterojunction between CIGS and CdS, ZnS, or CdS/ZnS for spontaneous water splitting in a bi-PEC cell.
研究成果
The study concludes that the heterojunction between CIGS and CdS, ZnS, or CdS/ZnS induces onset potential shift, contributing to spontaneous water splitting in a bi-PEC cell. The CIGS/CdS/ZnS structure shows significant improvement in both onset potential and photocurrent, indicating the importance of interface control in photoelectrode materials for efficient solar water splitting.
研究不足
The study acknowledges the discordance between estimated and actual operating current density in the bi-PEC cell, attributed to high solution resistance and charge transfer resistance at one of the photoelectrodes.
1：Experimental Design and Method Selection:
The study involves the preparation of CIGS thin films on Mo-coated soda-lime glass via spin coating and sulfo-selenization process, followed by CdS and ZnS coating using chemical bath deposition (CBD) method. Platinum co-catalyst was electrodeposited on various photocathodes.
2：Sample Selection and Data Sources:
CIGS films were prepared on substrates of 500nm Mo-coated soda-lime glass.
3：List of Experimental Equipment and Materials:
Scanning electron microscopy (SEM, S-4200, Hitachi), X-ray photoelectron spectroscopy (XPS, PHI 5000 VersaProbe, Ulac-PHI), ultraviolet photoelectron spectroscopy (UPS, PHI 5000 VersaProbe, Ulac-PHI), potentiostat (Iviumstat, Ivium).
4：Experimental Procedures and Operational Workflow:
Linear sweep voltammetry (LSV) was carried out to measure the activity of photoelectrodes. Electrochemical impedance spectroscopy (EIS) was performed to investigate charge transfer resistance.
5：Data Analysis Methods:
The EIS data were fitted by a Z view software.
独家科研数据包，助您复现前沿成果，加速创新突破
获取完整内容
