摘要
纳米金属Zn O作为界面缓冲材料能够有效提高基于有机金属卤化物-甲基碘化铵的钙钛矿(PVSK)太阳能电池的水氧稳定性,是溶液制备高稳定性钙钛矿太阳能电池的一个关键技术。而在器件的制备过程中,Zn O分散溶剂的渗透可能导致下层钙钛矿薄膜的结构物性发生变化,从而对器件性能造成显著的影响。为解决该问题,本文详细分析了不同极性有机溶剂对Zn O分散性的影响,研究了不同溶剂对PVSK/PCBM薄膜的吸收光谱和晶体结构的影响,最终获得了甲醇-正丁醇混合溶剂的体积比为1∶1、Zn O质量浓度为10 mg·m L-1的优化分散体系,为进一步开展全溶液法制备钙钛矿太阳能电池提供了重要指导。
ZnO nanoparticle has been used as cathode buffer layer （CBL） in organo-lead halide perovskite （PVSK） solar cells to improve device stability against oxygen and moisture. For solution processing procedure, solvents for dissolving ZnO has to be carefully optimized, since solvent penetration during the CBL deposition might cause the decomposition of the PVSK film. Aiming at the development of nano-ZnO inks for using in PVSK solar cells, the current work systematically investigate the dispersibility of nano-ZnO in various polar solvents, including acetone, methanol, ethanol, isopropanol, n-butanol, and a mixture solvent of methanol：n-buthanol （MeOH：n-BuOH, 1：1, v/v）, and the influence of such solvent on the UV-Vis absorption and crystalline properties of the underlying PVSK/PCBM film. PVSK solar cells with a device structure of ITO/PEDOT：PSS/PSS/PVSK/PCBM/ZnO/Al were then fabricated and tested. The optimized nano-ZnO ink is found to be MeOH：n-BuOH mixture solvent based （1：1, v/v） with a concentration of 10 mg·mL-1. The current work provides an important guideline for developing CBL inks for PVSK solar cells.
出处
《发光学报》
EI
CAS
CSCD
北大核心
2016年第3期265-273,共9页
Chinese Journal of Luminescence
基金
江苏省科技厅重点研发计划(BE2015071)
国家自然科学基金(61306073)资助项目
