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- Title
Improved performance of perovskite solar cell by controlling CHNHPbICl film morphology with CHNHCl-assisted method.
- Authors
Zhao, B.; Zhu, L.; Zhao, Y.; Yang, Y.; Song, J.; Gu, X.; Xing, Z.; Qiang, Y.
- Abstract
Sequential deposition solution-based method has been widely used for the fabrication of perovskite solar cells (PSCs). However, there is still a challenge to achieve homogeneous and consecutive surface of the perovskite layers. In this work, CHNHPbICl layers were prepared by a modified two-step solution method. Specifically, the optimum amount of CHNHCl pre-added into PbI precursor solution, the appropriate size of pinholes and voids appear in PbI films and leave room for the growth of CHNHPbICl crystal. Under this condition, the crystal grains size is diminished and the surface coverage ratio of CHNHPbICl film is enhanced, which prevent the combination of electron-hole pairs on the interface between perovskite layer and TiO substrate. By varying the CHNHCl amounts, the PSC devices displayed the highest power conversion efficiency of 13 %, which was obviously higher than that of the one prepared via transitional routes (10.32 %). As a result, we developed a simple and repeatable route for controllable synthesis of perovskite absorption layers, which is demonstrated to be effective to improve the performance of PSCs.
- Subjects
SOLAR cells; PEROVSKITE; ELECTRIC properties; EXCITON theory; SUBSTRATES (Materials science); TITANIUM oxides; SOLAR energy conversion
- Publication
Journal of Materials Science: Materials in Electronics, 2016, Vol 27, Issue 10, p10869
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-016-5196-8