基于d-山梨醇六乙酸酯改性的MAPbI的无空穴导体、全可印刷介观钙钛矿太阳能电池中缺陷的孔填充和钝化改善
Improved Pore-Filling and Passivation of Defects in Hole-Conductor-Free, Fully Printable Mesoscopic Perovskite Solar Cells Based on d-Sorbitol Hexaacetate-Modified MAPbI.
作者信息
Liu Jian, Wang Dongjie, Chen Kun, She Bin, Liu Baichen, Huang Yu, Xie Wenfa, Zhang Jian, Zhang Hailiang
机构信息
Key Laboratory of Polymeric Materials and Application Technology of Hunan Province, Key Laboratory of Advanced Functional Polymer Materials of Colleges, Universities of Hunan Province, College of Chemistry, Xiangtan University, Xiangtan 411105, Hunan, China.
School of Materials Science and Engineering, Engineering Research Center of Electronic Information Materials and Devices, Ministry of Education, Guangxi Key Laboratory of Information Materials, Guilin University of Electronic Technology, Guilin 541004, Guangxi, China.
出版信息
ACS Appl Mater Interfaces. 2020 Oct 21;12(42):47677-47683. doi: 10.1021/acsami.0c15554. Epub 2020 Oct 6.
For hole-conductor-free, fully printable mesoscopic perovskite solar cells (MPSCs), it is difficult to achieve free and efficient diffusion of perovskite precursors in micron-scale porous structures. Thus, the wettability of the perovskite precursor is one of the most crucial factors that determine the performance of MPSCs. Here, d-sorbitol hexaacetate (DSHA) is introduced as an additive for fabricating hole-conductor-free, fully printable MPSCs based on methylammonium lead iodide (MAPbI). The fabricated MPSCs exhibited an efficiency of 14.33%. Moreover, the influence of DSHA on the optical properties, morphology, and filling of perovskite in the MPSCs has been systematically investigated. The results revealed that DSHA effectively optimized the morphology, improved the pore-filling, and passivated the defects of perovskite films. Remarkably, the unencapsulated MPSCs retained 93% of their original power-conversion efficiency (PCE) after 45 days of storage in air with humidity of 50 ± 5%.
对于无空穴导体、完全可印刷的介观钙钛矿太阳能电池（MPSC）而言，要在微米级多孔结构中实现钙钛矿前驱体的自由且高效扩散是困难的。因此，钙钛矿前驱体的润湿性是决定MPSC性能的最关键因素之一。在此，引入六乙酸山梨醇酯（DSHA）作为添加剂，用于制备基于甲基碘化铅（MAPbI）的无空穴导体、完全可印刷的MPSC。制备的MPSC效率达到了14.33%。此外，还系统研究了DSHA对MPSC中钙钛矿的光学性质、形貌和填充情况的影响。结果表明，DSHA有效优化了形貌，改善了孔隙填充，并钝化了钙钛矿薄膜的缺陷。值得注意的是，未封装的MPSC在湿度为50±5%的空气中储存45天后，仍保留其原始功率转换效率（PCE）的93%。
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