Solvent engineering for high-performance inorganic-organic hybrid perovskite solar cells
Solvent engineering for high-performance inorganic-organic hybrid perovskite solar cells
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DOI：
10.1038/nmat4014
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发表时间：
2014-09-01
期刊：
影响因子：
41.2
通讯作者：
Seok, Sang Il
中科院分区：
文献类型：
--
作者：
Jeon, Nam Joong;Noh, Jun Hong;Seok, Sang Il
有机铅三卤化物钙钛矿材料已成功地用作高效光伏电池中的光吸收剂。基于介观金属氧化物和平面异质结的两种不同的电池结构已经在性能上表现出非常令人印象深刻的进步。在这里，我们报告了一个双层结构，包括介观和平面结构的关键特征，通过一个完全基于溶液的过程。我们采用CH_3 NH_3 Pb（I_（1-x）Br_x）（3）（x = 0.1-0.15）作为吸收层，聚三芳胺作为空穴传输材料。使用γ-丁内酯和二甲基亚砜（DMSO）的混合溶剂，然后甲苯滴铸，通过CH 3 NH3 I-PbI 2-DMSO中间相产生非常均匀和致密的钙钛矿层，并且能够制造具有16.2%的认证功率转换效率和无滞后的显著改进的太阳能电池。这些结果为理解溶液处理在实现低成本和高效钙钛矿太阳能电池中的作用提供了重要进展。
Organolead trihalide perovskite materials have been successfully used as light absorbers in efficient photovoltaic cells. Two different cell structures, based on mesoscopic metal oxides and planar heterojunctions have already demonstrated very impressive advances in performance. Here, we report a bilayer architecture comprising the key features of mesoscopic and planar structures obtained by a fully solution-based process. We used CH3NH3 Pb(I1-xBrx)(3) (x = 0.1-0.15) as the absorbing layer and poly(triarylamine) as a hole-transporting material. The use of a mixed solvent of gamma-butyrolactone and dimethylsulphoxide (DMSO) followed by toluene drop-casting leads to extremely uniform and dense perovskite layers via a CH3NH3I-PbI2-DMSO intermediate phase, and enables the fabrication of remarkably improved solar cells with a certified power-conversion efficiency of 16.2% and no hysteresis. These results provide important progress towards the understanding of the role of solution-processing in the realization of low-cost and highly efficient perovskite solar cells.