【摘要】 对倒置结构，带隙为1.68 eV的钙钛矿太阳电池光吸收层掺杂1,1’-磺酰基双（2-甲基-1H-咪唑），以改善钙钛矿薄膜质量，提高太阳电池性能。空间电荷限制电流（SCLC）测试结果表明，掺杂后的钙钛矿薄膜的缺陷密度明显降低；稳态光致发光光谱（PL）结果表明，掺杂后的钙钛矿薄膜的非辐射复合被显著抑制；最终太阳电池的开路电压达到1.17 V，光电转换效率达到21.42%，在氮气环境下储存1000 h后，未封装的太阳电池仍能保持初始效率的96%，稳定性显著提高。更多还原

【Abstract】 In this work,1,1’-sulfonyl bis(2-methyl-1H-imidazole)was doped into the light absorption layer of inverted structure perovskite solar cells with a band gap of ～1.68 eV,resulting in improved film quality and device performance. Space charge limited current(SCLC)testing results reveal that the defect density of doped perovskite films decreases significantly,while the steady-state photoluminescence(PL)analysis demonstrates that non-radiative recombination is significantly inhibited. The open-circuit voltage reaches 1.17 V and the photoelectric conversion efficiency achieves 21.42%. The unpackaged device can still maintain 96% of the initial efficiency,and the stability is significantly improved after being stored in nitrogen environment for 1000 hours.更多还原