Laser‐Generated Supranano Liquid Metal as Efficient Electron Mediator in Hybrid Perovskite Solar Cells
Laser‐Generated Supranano Liquid Metal as Efficient Electron Mediator in Hybrid Perovskite Solar Cells
复制标题
激光产生的超纳米液态金属作为混合钙钛矿太阳能电池中的高效电子介体
DOI：
10.1002/adma.202001571
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发表时间：
2020
影响因子：
29.4
通讯作者：
Hongqiang Wang
中科院分区：
文献类型：
--
作者：
Huiwu Yu;Wenhao Zhao;Long Ren;Hongyue Wang;Pengfei Guo;Xiaokun Yang;Qian Ye;Dmitry Shchukin;Yi Du;Shixue Dou;Hongqiang Wang
制造具有定制尺寸的液态金属胶体在纳米电子学中具有重要的技术意义，而制造超纳米（<10纳米）液态金属以解开其非常规功能之谜仍然是一个挑战。目前的研究开创了脉冲激光从固体靶到液体的液体照射技术，并产生了通过湿化学合成难以获得的液体三元纳米合金。本文揭示了超微量液态金属在钙钛矿薄膜晶界处介导电子的重要作用，这对影响钙钛矿太阳能电池载流子的复合和迟滞具有重要意义。通过在钙钛矿薄膜中嵌入超氧化物液态金属，可以制备出在最大功率点示波时稳定输出功率为21.32%的铯基三元钙钛矿太阳能电池。本研究为合成具有先进光电应用价值的多超纳米合金开辟了新途径。
Creating colloids of liquid metal with tailored dimensions has been of technical significance in nano‐electronics while a challenge remains for generating supranano (<10 nm) liquid metal to unravel the mystery of their unconventional functionalities. Present study pioneers the technology of pulsed laser irradiation in liquid from a solid target to liquid, and yields liquid ternary nano‐alloys that are laborious to obtain via wet‐chemistry synthesis. Herein, the significant role of the supranano liquid metal on mediating the electrons at the grain boundaries of perovskite films, which are of significance to influence the carriers recombination and hysteresis in perovskite solar cells, is revealed. Such embedding of supranano liquid metal in perovskite films leads to a cesium‐based ternary perovskite solar cell with stabilized power output of 21.32% at maximum power point tracing. This study can pave a new way of synthesizing multinary supranano alloys for advanced optoelectronic applications.