Fast Growth of Thin MAPbI3 Crystal Wafers on Aqueous Solution Surface for Efficient Lateral‐Structure Perovskite Solar Cells,Advanced Functional Materials

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Fast Growth of Thin MAPbI3 Crystal Wafers on Aqueous Solution Surface for Efficient Lateral‐Structure Perovskite Solar Cells
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2019-01-23 , DOI: 10.1002/adfm.201807707
Ye Liu ₁ , Qingfeng Dong ₁ , Yanjun Fang ₁ , Yuze Lin ₂ , Yehao Deng ₂ , Jinsong Huang _{1,

2}

Affiliation

Solar‐grade single or multiple crystalline wafers are needed in large quantities in the solar cell industry, and are generally formed by a top‐down process from crystal ingots, which causes a significant waste of materials and energy during slicing, polishing, and other processing. Here, a bottom‐up technique that allows the growth of wafer‐size hybrid perovskite multiple crystals directly from aqueous solution is reported. Single‐crystalline hybrid perovskite wafers with centimeter size are grown at the top surface of a perovskite precursor solution. As well as saving raw materials, this method provides unprecedented advantages such as easily tunable thickness and rapid growth of the crystals. These crystalline wafers show high crystallinity, broader light absorption, and a long carrier recombination lifetime, comparable with those of bulk single crystals. Lateral‐structure perovskite solar cells made of these crystals demonstrate a record power conversion efficiency of 5.9%.

中文翻译：

高效的横向结构钙钛矿太阳能电池在水溶液表面上快速生长的MAPbI3晶体薄晶圆

太阳能电池行业大量需要太阳能级的单晶或多晶晶片，通常是由晶锭通过自顶向下的工艺形成的，这在切片，抛光和其他加工过程中会大量浪费材料和能量。此处报道了一种自下而上的技术，该技术可直接从水溶液中生长出晶圆尺寸的混合钙钛矿多晶体。在钙钛矿前体溶液的顶部表面生长厘米级的单晶混合钙钛矿晶片。除了节省原材料外，该方法还提供了前所未有的优势，例如易于调节的厚度和晶体的快速生长。这些结晶晶圆显示出高结晶度，更宽的光吸收率和更长的载流子复合寿命，可与块状单晶媲美。用这些晶体制成的横向结构钙钛矿太阳能电池的功率转换效率达到了创纪录的5.9％。

更新日期：2019-11-20

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