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In situ recycle of PbI2 as a step towards sustainable perovskite solar cells
Progress in Photovoltaics ( IF 8.0 ) Pub Date : 2017-07-21 , DOI: 10.1002/pip.2916 Jie Xu 1 , Ziyang Hu 1 , Like Huang 2 , Xiaokun Huang 1 , Xianyu Jia 1 , Jing Zhang 1 , Jianjun Zhang 2 , Yuejin Zhu 1
Progress in Photovoltaics ( IF 8.0 ) Pub Date : 2017-07-21 , DOI: 10.1002/pip.2916 Jie Xu 1 , Ziyang Hu 1 , Like Huang 2 , Xiaokun Huang 1 , Xianyu Jia 1 , Jing Zhang 1 , Jianjun Zhang 2 , Yuejin Zhu 1
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The development of organometal halide perovskite solar cells has grown rapidly and the highest efficiency of the devices has recently surpassed 22%. Because these solar cells contain toxic lead, a sustainable strategy is required to prevent environmental pollution and avoid healthy hazard caused by possible lead outflow. Here, in situ recycling PbI2 from thermal decomposition CH3NH3PbI3 perovskite films for efficient perovskite solar cells was developed. The thermal behavior of CH3NH3PbI3 perovskite and its individual components were examined by thermogravimetric analysis. By optimizing the process of thermal decomposition CH3NH3PbI3 film, the complete conversion from CH3NH3PbI3 to pure PbI2 layer with a mesoporous scaffold was achieved. The mesoporous structure readily promotes the conversion efficiency of perovskite and consequently results in high‐performance device. A perovskite crystal growth mechanism on the mesoporous PbI2 structure was proposed. These results suggest that in situ recycled PbI2 scaffolds can be a new route in manipulating the morphology of the perovskite active layer, providing new possibilities for high performance. Meanwhile, the risk of lead outflow can be released, and the saving‐energy fabrication of efficient solar cells can be realized.
中文翻译：
PbI2的原位回收是迈向可持续钙钛矿太阳能电池的一步
有机金属卤化物钙钛矿太阳能电池的发展迅速，最近，该器件的最高效率已超过22％。由于这些太阳能电池包含有毒的铅，因此需要采取可持续的策略来防止环境污染并避免可能的铅外流对健康造成危害。在此，开发了从热分解CH 3 NH 3 PbI 3钙钛矿薄膜中原位回收PbI 2的方法，以制成高效的钙钛矿太阳能电池。通过热重分析检查了CH 3 NH 3 PbI 3钙钛矿及其各个组分的热行为。通过优化热分解过程，CH 3 NH在3 PbI 3膜中，使用中孔支架将CH 3 NH 3 PbI 3完全转化为纯PbI 2层。介孔结构易于提高钙钛矿的转化效率，因此可产生高性能的装置。提出了介孔PbI 2结构上钙钛矿晶体的生长机理。这些结果表明，原位回收的PbI 2支架可以成为操纵钙钛矿活性层形态的新途径，为高性能化提供新的可能性。同时，可以消除铅流出的风险，并且可以实现高效太阳能电池的节能制造。
更新日期：2017-07-21
中文翻译：
PbI2的原位回收是迈向可持续钙钛矿太阳能电池的一步
有机金属卤化物钙钛矿太阳能电池的发展迅速，最近，该器件的最高效率已超过22％。由于这些太阳能电池包含有毒的铅，因此需要采取可持续的策略来防止环境污染并避免可能的铅外流对健康造成危害。在此，开发了从热分解CH 3 NH 3 PbI 3钙钛矿薄膜中原位回收PbI 2的方法，以制成高效的钙钛矿太阳能电池。通过热重分析检查了CH 3 NH 3 PbI 3钙钛矿及其各个组分的热行为。通过优化热分解过程，CH 3 NH在3 PbI 3膜中，使用中孔支架将CH 3 NH 3 PbI 3完全转化为纯PbI 2层。介孔结构易于提高钙钛矿的转化效率，因此可产生高性能的装置。提出了介孔PbI 2结构上钙钛矿晶体的生长机理。这些结果表明，原位回收的PbI 2支架可以成为操纵钙钛矿活性层形态的新途径，为高性能化提供新的可能性。同时，可以消除铅流出的风险，并且可以实现高效太阳能电池的节能制造。
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