Additive Engineering for Efficient and Stable MAPbI3-Perovskite Solar Cells with an Efficiency of over 21%,ACS Applied Materials & Interfaces

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Additive Engineering for Efficient and Stable MAPbI3-Perovskite Solar Cells with an Efficiency of over 21%
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2021-09-10 , DOI: 10.1021/acsami.1c13136
Junlei Tao _{1,

2,

3,

4} , Zhiwen Wang ₁ , Hongwei Wang ₁ , Jinliang Shen ₁ , Xiaoni Liu ₁ , Jingwei Xue ₁ , Hansong Guo ₁ , Guangsheng Fu ₁ , Weiguang Kong ₁ , Shaopeng Yang _{1,

2,

3,

4}

Affiliation

The high density of defects in MAPbI₃ perovskite films brings about severe carrier nonradiative recombination loss, which lowers the performance of MAPbI₃-based perovskite solar cells (PSCs). Here, methylamine cyanate (MAOCN) molecules were introduced into MAPbI₃ solutions to manipulate the crystallizatsion of the MAPbI₃ films. MAOCN molecules can slow down the volatilization rate of the solvent and delay the crystallization process of the MAPbI₃ film. The crystal quality of the MAPbI₃ films is effectively optimized without an additive residue. Perovskite films treated by MAOCN have lower defect density and longer carrier lifetime, which lowers the carrier recombination loss. Meanwhile, the MAPbI₃ film based on MAOCN has a more hydrophobic surface. The final MAPbI₃-based device efficiency reached 21.28% (V_OC = 1.126 V, J_SC = 23.29 mA/cm², and FF = 81.13). After 30 days of storage under atmospheric conditions, the efficiency of unencapsulated MAOCN-based PSCs only dropped by about 5%.

中文翻译：

高效稳定的 MAPbI3-钙钛矿太阳能电池的增材工程，效率超过 21%

MAPbI ₃钙钛矿薄膜中的高缺陷密度带来了严重的载流子非辐射复合损失，从而降低了基于MAPbI ₃的钙钛矿太阳能电池（PSC）的性能。在这里，将甲基胺氰酸酯 (MAOCN) 分子引入到 MAPbI ₃溶液中以控制 MAPbI ₃薄膜的结晶。MAOCN分子可以减缓溶剂的挥发速度，延缓MAPbI ₃薄膜的结晶过程。MAPbI ₃的晶体质量薄膜在没有添加剂残留的情况下得到有效优化。MAOCN 处理的钙钛矿薄膜具有更低的缺陷密度和更长的载流子寿命，从而降低了载流子复合损失。同时，基于 MAOCN的 MAPbI ₃膜具有更疏水的表面。最终的基于MAPbI ₃的器件效率达到 21.28%（V _OC = 1.126 V，J _SC = 23.29 mA/cm ²，FF = 81.13）。在大气条件下储存 30 天后，未封装的基于 MAOCN 的 PSC 的效率仅下降了约 5%。

更新日期：2021-09-22

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