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5 years ago

Enhancing the Performance of Perovskite Solar Cells by Hybridizing SnS Quantum Dots with CH3NH3PbI3

Enhancing the Performance of Perovskite Solar Cells by Hybridizing SnS Quantum Dots with CH3NH3PbI3
Xuewen Yin, Jianbao Li, Yu Zhou, Hui Nan, Dan Oron, Hong Lin, Zhibo Yao, Jianhua Han
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 CH3NH3PbI3/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 CH3NH3PbI3, SCs using CH3NH3PbI3/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. A CH3NH3PbI3/SnS quantum dots hybrid film is fabricated by a facile in situ crystallization process. This method takes advantage of complementarity of perovskite and quantum dots. Solar cells with hybrid absorber layer achieve 25% enhancement in efficiency than perovskite layer. A method for preparing perovskite/quantum dots hybrid materials is presented, exhibiting potential in design and preparation of other hybrid materials.

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1002/smll.201700953

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