Inorganic hole conductor-based lead halide perovskite solar cells with 12.4% conversion efficiency
Inorganic hole conductor-based lead halide perovskite solar cells with 12.4% conversion efficiency
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DOI：
10.1038/ncomms4834
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发表时间：
2014-05-01
影响因子：
16.6
通讯作者：
Graetzel, Michael
中科院分区：
文献类型：
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作者：
Qin, Peng;Tanaka, Soichiro;Graetzel, Michael
有机铅卤化物钙钛矿材料由于其独特的光学和电学性能而在太阳能电池应用中引起了广泛的关注。无论是低温溶液处理还是真空蒸发，具有有机空穴传输材料的钙钛矿太阳能电池的整体转换效率在过去两年中迅速提高到15%以上。然而，所用的有机空穴传输材料通常由于复杂的合成过程或高纯度要求而相当昂贵。在这里，我们展示了一种有效和廉价的无机p型空穴传输材料，硫氰酸铜，卤化铅钙钛矿为基础的设备上的应用。采用低温溶液沉积法，在全光照条件下获得了12.4%的功率转换效率。这项工作代表了一个定义明确的电池配置与优化的钙钛矿形态的两次碘化铅沉积，并打开了大门，一类丰富的和廉价的材料集成的光伏应用。
Organo-lead halide perovskites have attracted much attention for solar cell applications due to their unique optical and electrical properties. With either low-temperature solution processing or vacuum evaporation, the overall conversion efficiencies of perovskite solar cells with organic hole-transporting material were quickly improved to over 15% during the last 2 years. However, the organic hole-transporting materials used are normally quite expensive due to complicated synthetic procedure or high-purity requirement. Here, we demonstrate the application of an effective and cheap inorganic p-type hole-transporting material, copper thiocyanate, on lead halide perovskite-based devices. With low-temperature solution-process deposition method, a power conversion efficiency of 12.4% was achieved under full sun illumination. This work represents a well-defined cell configuration with optimized perovskite morphology by two times of lead iodide deposition, and opens the door for integration of a class of abundant and inexpensive material for photovoltaic application.