Stable Sn/Pb-Based Perovskite Solar Cells with a Coherent 2D/3D Interface.
Stable Sn/Pb-Based Perovskite Solar Cells with a Coherent 2D/3D Interface.
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具有相干 2D/3D 界面的稳定锡/铅基钙钛矿太阳能电池
DOI：
10.1016/j.isci.2018.11.003
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发表时间：
2018-11-30
期刊：
影响因子：
5.8
通讯作者：
Cao Y
中科院分区：
文献类型：
--
作者：
Chen Z;Liu M;Li Z;Shi T;Yang Y;Yip HL;Cao Y
基于混合锡/铅的低带隙金属卤化物钙钛矿半导体是实现高效串联钙钛矿太阳能电池的关键元件。然而，由于Sn2+的氧化作用，混合钙钛矿在空气中不稳定。为了克服稳定性问题，我们将N-（3-氨基丙基）-2-吡咯烷酮引入到CH3NH3Sn0.5Pb0.5IxCl3-x薄膜中。分子上的羰基通过刘易斯酸配位与Sn2+/Pb2+相互作用，形成垂直取向的二维层状钙钛矿。二维相与大块钙钛矿晶体无缝连接，晶格在两相之间连贯地延伸。基于这种2D/3D混合结构，我们组装了低带隙sn基钙钛矿太阳能电池，其功率转换效率大于12%。最佳器件是迄今为止最稳定的锡基有机-无机杂化钙钛矿太阳能电池之一，在没有封装的环境条件下保持90%的初始性能，在充满氮气的手套箱中连续照明超过1个月的情况下保持70%以上的性能。2D钙钛矿晶格与3D钙钛矿晶格无缝连接，在单一钙钛矿薄膜中直接观察到2D钙钛矿的多晶态，这是迄今为止最稳定的sn基钙钛矿太阳能电池之一。光学材料;能源材料
Low-band-gap metal halide perovskite semiconductor based on mixed Sn/Pb is a key component to realize high-efficiency tandem perovskite solar cells. However, the mixed perovskites are unstable in air due to the oxidation of Sn2+. To overcome the stability problem, we introduced N-(3-aminopropyl)-2-pyrrolidinone into the CH3NH3Sn0.5Pb0.5IxCl3-x thin film. The carbonyl group on the molecule interacts with Sn2+/Pb2+ by Lewis acid coordination, forming vertically oriented 2D layered perovskite. The 2D phase is seamlessly connected to the bulk perovskite crystal, with a lattice coherently extending across the two phases. Based on this 2D/3D hybrid structure, we assembled low-band-gap Sn-based perovskite solar cells with power conversion efficiency greater than 12%. The best device was among the most stable Sn-based organic-inorganic hybrid perovskite solar cells to date, keeping 90% of its initial performance at ambient condition without encapsulation, and more than 70% under continuous illumination in an N2-filled glovebox for over 1 month. The 2D perovskite lattice is seamlessly connected to the 3D perovskite lattice Polymorphs of 2D perovskite were directly observed in a single perovskite film The best device is among the most stable Sn-based perovskite solar cells to date Materials Science; Optical Materials; Energy Materials
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影响因子：
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