Perovskite Solar Cells Fabricated by Using an Environmental Friendly Aprotic Polar Additive of 1,3-Dimethyl-2-imidazolidinone

Nanoscale Research Letters

Yanqing Li¹  Xiaobing Cao²  Yahui Li²  Xian Cui²  Jinquan Wei²  Lijie Ci³  Lili Zhi³ 

[1] Department of Physics, Changji College;Key Lab for Advanced Materials Processing Technology of Education Ministry, Tsinghua University;School of Materials Science and Engineering, Shandong University;

关键词: Perovskite solar cell;    Aprotic polar solvent;    Lewis acid–base adduct;    1,3-Dimethyl-2-imidazolidinone;   

DOI  :  10.1186/s11671-017-2391-3

来源: DOAJ

【 摘 要 】

Abstract Perovskite solar cells (PSCs) have great potentials in photovoltaics due to their high power conversion efficiency and low processing cost. PSCs are usually fabricated from PbI2/dimethylformamide solution with some toxic additives, such as N-methyl pyrrolidone and hexamethylphosphoramide. Here, we use an environmental friendly aprotic polar solvent, 1,3-dimethyl-2-imidazolidinone (DMI), to fabricate perovskite films. By adding 10 vol% DMI in the precursor solution, high-quality perovskite films with smooth surface are obtained. By increasing annealing temperature from 100 to 130 °C, the average grain size of the perovskite increases from ~ 216 to 375 nm. As a result, the efficiency of the PSCs increases from 10.72 to 14.54%.

【 授权许可】

Unknown