Lei Hongwei, Yang Guang, Guo Yaxiong, Xiong Liangbin, Qin Pingli, Dai Xin, Zheng Xiaolu, Ke Weijun, Tao Hong, Chen Zhao, Li Borui, Fang Guojia
Key Lab of Artificial Micro- and Nano-Structures of Ministry of Education of China, Department of Electronic Science & Technology, School of Physics and Technology, Wuhan University, Wuhan 430072, People's Republic of China.
Phys Chem Chem Phys. 2016 Jun 28;18(24):16436-43. doi: 10.1039/c6cp02072k. Epub 2016 Jun 6.
Efficient planar antimony sulfide (Sb2S3) heterojunction solar cells have been made using chemical bath deposited (CBD) Sb2S3 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-Sb2S3/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 Sb2S3 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 Sb2S3 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/Sb2S3.
通过化学浴沉积（CBD）的硫化锑（Sb2S3）作为吸收层、低温溶液法制备的氧化锡（SnO2）作为电子导体以及聚（3-己基噻吩）（P3HT）作为空穴导体，已制备出高效的平面硫化锑（Sb2S3）异质结太阳能电池。在1个太阳光照下，使用由F掺杂的SnO2衬底/SnO2/CBD-Sb2S3/P3HT/Au组成的平面器件，获得了2.8%的太阳能转换效率，而基于二氧化钛（TiO2）电子导体的太阳能电池的功率转换效率为1.9%。与传统的Sb2S3敏化太阳能电池相比，不再需要高温处理的介观TiO2支架。更重要的是，引入了低温溶液法制备的SnO2层用于电子传输，以替代高温烧结的致密阻挡TiO2层。我们的平面太阳能电池不仅具有简单的几何结构且制造步骤更少，而且性能有所提高。基于SnO2电子导体的平面Sb2S3太阳能电池器件效率更高，这归因于它们的高透明度、均匀的表面、SnO2高效的电子传输特性、合适的能带排列以及SnO2/Sb2S3界面处复合的减少。
