通过将硫化锡量子点与CH₃NH₃PbI₃杂交提高钙钛矿太阳能电池的性能
Enhancing the Performance of Perovskite Solar Cells by Hybridizing SnS Quantum Dots with CH NH PbI.
作者信息
Han Jianhua, Yin Xuewen, Nan Hui, Zhou Yu, Yao Zhibo, Li Jianbao, Oron Dan, Lin Hong
机构信息
State Key Laboratory of New Ceramics and Fine Processing, Department of Materials Science and Engineering, Tsinghua University, Beijing, 100084, China.
State Key Laboratory of Marine Resource Utilization in South China Sea, Materials and Chemical Engineering Institute, Hainan University, Haikou, 570228, China.
出版信息
Small. 2017 Aug;13(32). doi: 10.1002/smll.201700953. Epub 2017 Jul 10.
The combination of perovskite solar cells and quantum dot solar cells has significant potential due to the complementary nature of the two constituent materials. In this study, solar cells (SCs) with a hybrid CH NH PbI /SnS quantum dots (QDs) absorber layer are fabricated by a facile and universal in situ crystallization method, enabling easy embedding of the QDs in perovskite layer. Compared with SCs based on CH NH PbI , SCs using CH NH PbI /SnS QDs hybrid films as absorber achieves a 25% enhancement in efficiency, giving rise to an efficiency of 16.8%. The performance improvement can be attributed to the improved crystallinity of the absorber, enhanced photo-induced carriers' separation and transport within the absorber layer, and improved incident light utilization. The generality of the methods used in this work paves a universal pathway for preparing other perovskite/QDs hybrid materials and the synthesis of entire nontoxic perovskite/QDs hybrid structure.
由于两种组成材料的互补特性，钙钛矿太阳能电池和量子点太阳能电池的结合具有巨大潜力。在本研究中，通过一种简便通用的原位结晶方法制备了具有混合CH₃NH₃PbI₃/SnS量子点（QDs）吸收层的太阳能电池（SCs），使得量子点能够轻松嵌入钙钛矿层。与基于CH₃NH₃PbI₃的太阳能电池相比，使用CH₃NH₃PbI₃/SnS量子点混合薄膜作为吸收体的太阳能电池效率提高了25%，达到了16.8%的效率。性能的提升可归因于吸收体结晶度的提高、吸收层内光生载流子分离和传输的增强以及入射光利用率的提高。本工作中使用方法的通用性为制备其他钙钛矿/量子点混合材料以及合成完全无毒的钙钛矿/量子点混合结构铺平了一条通用途径。
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