气候变化领域集成服务门户(CCPortal): Efficient CdTe Nanocrystal/TiO2 Hetero-Junction Solar Cells with Open Circuit Voltage Breaking 0.8 V by Incorporating A Thin Layer of CdS Nanocrystal

CCPortal

DOI	10.3390/nano8080614
	Efficient CdTe Nanocrystal/TiO2 Hetero-Junction Solar Cells with Open Circuit Voltage Breaking 0.8 V by Incorporating A Thin Layer of CdS Nanocrystal
	Mei, Xianglin; Wu, Bin; Guo, Xiuzhen; Liu, Xiaolin; Rong, Zhitao; Liu, Songwei; Chen, Yanru; Qin, Donghuan; Xu, Wei; Hou, Lintao; Chen, Bingchang
发表日期	2018
ISSN	2079-4991
卷号	8 期号:8
英文摘要	Nanocrystal solar cells (NCs) allow for large scale solution processing under ambient conditions, permitting a promising approach for low-cost photovoltaic products. Although an up to 10% power conversion efficiency (PCE) has been realized with the development of device fabrication technologies, the open circuit voltage (V-oc) of CdTe NC solar cells has stagnated below 0.7 V, which is significantly lower than most CdTe thin film solar cells fabricated by vacuum technology (around 0.8 V similar to 0.9 V). To further improve the NC solar cells' performance, an enhancement in the V-oc towards 0.8-1.0 V is urgently required. Given the unique processing technologies and physical properties in CdTe NC, the design of an optimized band alignment and improved junction quality are important issues to obtain efficient solar cells coupled with high V-oc. In this work, an efficient method was developed to improve the performance and V-oc of solution-processed CdTe nanocrystal/TiO2 hetero-junction solar cells. A thin layer of solution-processed CdS NC film (similar to 5 nm) as introduced into CdTe NC/TiO2 to construct hetero-junction solar cells with an optimized band alignment and p-n junction quality, which resulted in a low dark current density and reduced carrier recombination. As a result, devices with improved performance (5.16% compared to 2.63% for the control device) and a V-oc as high as 0.83 V were obtained; this V-oc value is a record for a solution-processed CdTe NC solar cell.
英文关键词	nanocrystal; CdTe; TiO2; CdS; solar cells; solution processed
WOS研究方向	Science & Technology - Other Topics ; Materials Science
WOS类目	Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary
来源期刊	NANOMATERIALS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/158515
作者单位	Qin, DH; Xu, W (corresponding author), South China Univ Technol, Sch Mat Sci & Engn, Guangzhou 510640, Guangdong, Peoples R China.; Qin, DH; Xu, W (corresponding author), South China Univ Technol, Inst Polymer Optoelect Mat & Devices, State Key Lab Luminescent Mat & Devices, Guangzhou 510640, Guangdong, Peoples R China.; Hou, LT (corresponding author), Jinan Univ, Guangdong Prov Key Lab Opt Fiber Sensing & Commun, Guangzhou Key Lab Vacuum Coating Technol & New En, Siyuan Lab,Dept Phys, Guangzhou 510632, Guangdong, Peoples R China.
推荐引用方式 GB/T 7714	Mei, Xianglin,Wu, Bin,Guo, Xiuzhen,et al. Efficient CdTe Nanocrystal/TiO2 Hetero-Junction Solar Cells with Open Circuit Voltage Breaking 0.8 V by Incorporating A Thin Layer of CdS Nanocrystal[J],2018,8(8).
APA	Mei, Xianglin.,Wu, Bin.,Guo, Xiuzhen.,Liu, Xiaolin.,Rong, Zhitao.,...&Chen, Bingchang.(2018).Efficient CdTe Nanocrystal/TiO2 Hetero-Junction Solar Cells with Open Circuit Voltage Breaking 0.8 V by Incorporating A Thin Layer of CdS Nanocrystal.NANOMATERIALS,8(8).
MLA	Mei, Xianglin,et al."Efficient CdTe Nanocrystal/TiO2 Hetero-Junction Solar Cells with Open Circuit Voltage Breaking 0.8 V by Incorporating A Thin Layer of CdS Nanocrystal".NANOMATERIALS 8.8(2018).