Perovskite Self-Passivation with PCBM for Small Open-Circuit Voltage Loss

• 作者: Lei Li Mengwei Su Wenhong Sun Wenwang Wei Xinglin Zhu Xinyu Zhao Xuan Zhang Yi Peng Yukun Wang Ziqian Chen
• 来源期刊: 能源与动力工程(英文)
• 学科: 工学
• 关键词: Self-Passivation Small Open-Circuit Voltage Loss PCBM
• 年，卷（期）: 2020,（6）
• 页码范围: 257-272
• 页数: 16页
• 分类号: TM9

摘要

It is well known that [6,6]-phenyl-C_{<span style="font-size:12px;font-family:Verdana;">61</span>}<span style="font-size:12px;font-family:Verdana;">-butyric acid methyl ester (PCBM) is a common n-type passivation material in PSCs, usually used as an interface modification layer. However, PCBM is extremely expensive and is not suitable for future industrialization. Herein, the various concentrations of PCBM as an additive are adopted for PSCs. It not only avoids the routine process of spin coating the multi-layer films, but also reduces the PCBM material and cost. Meanwhile, PCBM can passivate the grain surface and modulate morphology of perovskite films. Furthermore, the most important optical parameters of solar cells, the current density (</span><i><span style="font-size:12px;font-family:Verdana;">J</span>_{<span style="font-size:12px;font-family:Verdana;">sc</span>}</i><span style="font-size:12px;font-family:Verdana;">), fill factor (FF), open-circuit voltage (</span><i><span style="font-size:12px;font-family:Verdana;">V</span>_{<span style="font-size:12px;font-family:Verdana;">oc</span>}</i><span style="font-size:12px;font-family:Verdana;">) and power conversion efficiencies (PCE) were improved. Especially, when the PCBM doping ratio in CH</span>_{<span style="font-size:12px;font-family:Verdana;">3</span>}<span style="font-size:12px;font-family:Verdana;">NH</span>_{<span style="font-size:12px;font-family:Verdana;">3</span>}<span style="font-size:12px;font-family:Verdana;">PbI</span>_{<span style="font-size:12px;font-family:Verdana;">3</span>}<span style="font-size:12px;font-family:Verdana;"> (MAPbI</span>_{<span style="font-size:12px;font-family:Verdana;">3</span>}<span style="font-size:12px;font-family:Verdana;">) precursor solution was 1</span><span><span><span style="font-family:;" "=""> </span></span></span><span><span><span style="font-family:;" "=""><span style="font-size:12px;font-family:Verdana;">wt%, the device obtained the smallest </span><i><s