Efficient planar Sb2S3 solar cells using a low-temperature solution-processed tin oxide electron conductor. Issue 24 (6th June 2016)

• Record Type: Journal Article
• Authors: Lei, Hongwei; Yang, Guang; Guo, Yaxiong; Xiong, Liangbin; Qin, Pingli; Dai, Xin; Zheng, Xiaolu; Ke, Weijun; Tao, Hong; Chen, Zhao; Li, Borui; Fang, Guojia
• Is Part Of: Physical chemistry chemical physics. Volume 18:Issue 24(2016)
• Page Start: 16436
• Page End: 16443
• Publication Date: 2016-06-06
• Subjects: Chemistry, Physical and theoretical -- Periodicals; 541.3
• DOI: 10.1039/c6cp02072k
• Languages: English
• ISSNs: 1463-9076

Abstract

Abstract : We reported efficient planar Sb2 S3 solar cells based on a low-temperature solution-processed SnO2 electron conductor. Abstract : Efficient planar antimony sulfide (Sb2 S3 ) heterojunction solar cells have been made using chemical bath deposited (CBD) Sb2 S3 as the absorber, low-temperature solution-processed tin oxide (SnO2 ) as the electron conductor and poly (3-hexylthiophene) (P3HT) as the hole conductor. A solar conversion efficiency of 2.8% was obtained at 1 sun illumination using a planar device consisting of F-doped SnO2 substrate/SnO2 /CBD-Sb2 S3 /P3HT/Au, whereas the solar cells based on a titanium dioxide (TiO2 ) electron conductor exhibited a power conversion efficiency of 1.9%. Compared with conventional Sb2 S3 sensitized solar cells, the high-temperature processed mesoscopic TiO2 scaffold is no longer needed. More importantly, a low-temperature solution-processed SnO2 layer was introduced for electron transportation to substitute the high-temperature sintered dense blocking TiO2 layer. Our planar solar cells not only have simple geometry with fewer steps to fabricate but also show enhanced performance. The higher efficiency of planar Sb2 S3 solar cell devices based on a SnO2 electron conductor is attributed to their high transparency, uniform surface, efficient electron transport properties of SnO2, suitable energy band alignment, and reduced recombination at the interface of SnO2 /Sb2 S3 .