NDLI: Mechanistic insights into the photoinduced charge carrier dynamics of BiOBr/CdS nanosheet heterojunctions for photovoltaic application

Content Provider	Royal Society of Chemistry (RSC)
Author	Zhang, Beibei Zheng, Zhi He, Weiwei Xiang, Yong Jia, Huimin
Copyright Year	2017
Abstract	The rational design of high performance hetero-structure photovoltaic devices requires a full understanding of the photoinduced charge transfer mechanism and kinetics at the interface of heterojunctions. In this paper, we intelligently fabricated p-BiOBr/n-CdS heterojunctions with perfect nanosheet arrays by using a facile successive ionic layer adsorption and reaction and chemical bath deposition methods at low temperature. A BiOBr/CdS heterojunction based solar cell has been fabricated which exhibited enhanced photovoltaic responses. Assisted by the surface photovoltage (SPV), transient photovoltage (TPV) and Kelvin probe technique, the photoinduced charge transfer dynamics on the BiOBr nanosheet and p-BiOBr/n-CdS interface were systematically investigated. It was found that the BiOBr/CdS nanosheet array heterojunctions were more efficient in facilitating charge carrier separation than both bare BiOBr and CdS films. The mechanism underlying the photoinduced charge carrier transfer behaviour was unravelled by allying the energy band of BiOBr/CdS p–n junctions from both the interfacial electric field and surface electric field. In addition, the CdS loading thickness in the p-BiOBr/n-CdS heterojunction and the incident wavelength affected greatly the transfer behavior of photoinduced charges, which was of great value for design of photovoltaic devices.
Starting Page	3180
Ending Page	3187
Page Count	8
File Format	HTM / HTML PDF
ISSN	20403364
Volume Number	9
Issue Number	9
Journal	Nanoscale
DOI	10.1039/c6nr09259d
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Solar cell Volta potential Nanosheet Electric field Kelvin Adsorption Chemical bath deposition Surface photovoltage Charge carrier Wavelength Heterojunction Special purpose entity
Content Type	Text
Resource Type	Article
Subject	Nanoscience and Nanotechnology

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