Efficient Grain Boundary Suture by Low-Cost Tetra-ammonium Zinc Phthalocyanine for Stable Perovskite Solar Cells with Expanded Photoresponse
Efficient Grain Boundary Suture by Low-Cost Tetra-ammonium Zinc Phthalocyanine for Stable Perovskite Solar Cells with Expanded Photoresponse
复制标题
通过低成本四铵锌酞菁进行有效晶界缝合，用于具有扩展光响应的稳定钙钛矿太阳能电池。
DOI：
10.1021/jacs.8b07025
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发表时间：
2018-09-19
影响因子：
15
通讯作者：
Tang, Yu
中科院分区：
文献类型：
--
作者：
Cao, Jing;Lv, Xudong;Tang, Yu
卤化物钙钛矿薄膜的晶界（GB）内的缺陷使得高效且稳定的钙钛矿太阳能电池（PSC）的制造极具挑战性。这里，使用低成本的四铵酞菁锌（ZnPc）对MAPbI（3）（MA = CH 3 NH3）膜进行后处理。在MAPbI（3）膜的晶界内成功地构建了二维（ZnPc）（0.5）MA（n-1）Pb（n）I（3 n +1），实现了晶界缝合，钝化了晶界中的缺陷。时间分辨光致发光表明，改性增加的衰减时间从44到57纳秒，表明钝化的GB减少陷阱辅助复合。经钙钛矿改性后的太阳能电池具有更高的光电压，最高效率提高了20.3%。更重要的是，响应PSC对湿度和加热的长期稳定性得到了前所未有的进一步提高。此外，改性后的MAPbI（3）薄膜在温和的加热下显示出自修复能力。这项工作提供了一个新的见解，正在进行的制造高效和稳定的PSC的高效GBs缝合线与低成本的酞菁。
Defects within the grain boundaries (GBs) of halide perovskite films make fabrication of efficient and stable perovskite solar cells (PSCs) highly challenging. Here, a low-cost tetra-ammonium zinc phthalocyanine (ZnPc) was used to post-treat the MAPbI(3) (MA = CH3NH3) film. Two-dimensional (ZnPc)(0.5)MA(n-1)Pb(n)I(3n+1) was successfully constructed within the GBs of MAPbI(3) film achieving a GBs suture for passivating the defects in GBs. Time-resolved photoluminescence showed that the modification increased the decay time from 44 to 57 ns indicating the passivation of GBs reduces trap-assisted recombination. The PSCs with modified perovskite exhibited increased photovoltage, and the best efficiency was improved up to 20.3%. More importantly, the long-term stability of the responding PSCs against humidity and heating was further improved unprecedentedly. Moreover, the modified MAPbI(3) films revealed a self-repairing capability under mild heating. This work provided a novel insight into ongoing fabrication of efficient and stable PSCs by the efficient GBs suture with low-cost phthalocyanine.