Yan Rongjing, Kang Li, Sun Yuxiu, Zhang Jingbo
Key Laboratory of Inorganic-Organic Hybrid Functional Material Chemistry, Ministry of Education, Tianjin Key Laboratory of Structure and Performance for Functional Molecules, College of Chemistry, Tianjin Normal University Tianjin 300387 China
RSC Adv. 2018 Mar 22;8(21):11469-11477. doi: 10.1039/c8ra01095a. eCollection 2018 Mar 21.
CuZnSnS (CZTS) thin film solar cells become an interesting research topic due to some advantages of the CZTS thin film such as having nontoxic and abundant components, a low price and excellent optoelectronic properties. In this work, a solution-based preparation method was developed to fabricate a CZTS solar cell with a superstrate structure of FTO/TiO/CdS/CZTS/P3HT/Cu by using mixed solvent. Nanocrystalline TiO porous thin film was used as the bottom layer for deposition of CZTS to increase the interfacial area of CZTS. To deposit CZTS inside the porous structure leading to a good contact of CZTS with porous TiO thin film, the CZTS precursor particle size is successfully regulated by changing the volume ratios of ,-dimethylformamide and ethanol. More importantly, small size CZTS precursor particles can easily enter into the porous structure of nanocrystalline thin film leading to a good interfacial contact, which allowed the effective improvement of the light-to-electric conversion efficiency for the present superstrate CZTS solar cell. This work may provide a promising way for the design of high-efficient superstrate solar cells.
由于CuZnSnS（CZTS）薄膜具有无毒且成分丰富、价格低廉以及优异的光电性能等优点，CZTS薄膜太阳能电池成为一个有趣的研究课题。在这项工作中，开发了一种基于溶液的制备方法，通过使用混合溶剂来制备具有FTO/TiO/CdS/CZTS/P3HT/Cu叠层结构的CZTS太阳能电池。纳米晶TiO多孔薄膜用作沉积CZTS的底层，以增加CZTS的界面面积。为了在多孔结构内部沉积CZTS，从而实现CZTS与多孔TiO薄膜的良好接触，通过改变N，N-二甲基甲酰胺和乙醇的体积比成功调节了CZTS前驱体的粒径。更重要的是，小尺寸的CZTS前驱体颗粒能够轻松进入纳米晶薄膜的多孔结构，从而实现良好的界面接触，这使得当前的叠层CZTS太阳能电池的光电转换效率得到有效提高。这项工作可能为高效叠层太阳能电池的设计提供一条有前景的途径。
