Potassium Incorporation for Enhanced Performance and Stability of Fully Inorganic Cesium Lead Halide Perovskite Solar Cells
Potassium Incorporation for Enhanced Performance and Stability of Fully Inorganic Cesium Lead Halide Perovskite Solar Cells
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DOI：
10.1021/acs.nanolett.7b00050
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发表时间：
2017-03-01
期刊：
影响因子：
10.8
通讯作者：
Park, Jong Hyeok
中科院分区：
文献类型：
--
作者：
Nam, Jae Keun;Chai, Sung Uk;Park, Jong Hyeok
杂化有机无机钙钛矿的热不稳定性一直是制造长期运行器件的主要障碍。铯铅卤化钙钛矿由于其极好的热稳定性而被建议作为一种替代的光吸收剂。然而，相不稳定性和较差的性能阻碍了该技术的进一步发展。在这里，铯铅卤化钙钛矿太阳能电池具有增强的性能和稳定性，通过加入钾离子。基于Cs0.925K0.075PbI2Br的平面结构器件实现了10.0%的功率转换效率，在无机钙钛矿太阳能电池领域创下了令人瞩目的记录。此外，该装置在空气中显示出延长的工作寿命。我们的研究将促进下一代光伏发电用铯铅卤化钙钛矿材料的发展。
Thermally unstable nature of hybrid organic inorganic perovskites has been a major obstacle to fabricating the long-term operational device. A cesium lead halide perovskite has been suggested as an alternative light absorber, due to its superb thermal stability. However, the phase instability and poor performance are hindering the further progress. Here, cesium lead halide perovskite solar cells with enhanced performance and stability are demonstrated via incorporating potassium cations. Based on Cs0.925K0.075PbI2Br, the planar-architecture device achieves a power conversion efficiency of 10.0%, which is a remarkable record in the field of inorganic perovskite solar cells. In addition, the device shows an extended operational lifetime against air. Our research will stimulate the development of cesium lead halide perovskite materials for next-generation photovoltaics.