Self-Assembled 2D Perovskite Layers for Efficient Printable Solar Cells
Self-Assembled 2D Perovskite Layers for Efficient Printable Solar Cells
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用于高效可印刷太阳能电池的自组装二维钙钛矿层
DOI：
10.1002/aenm.201803258
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发表时间：
2019
影响因子：
27.8
通讯作者：
Gao Mei
中科院分区：
文献类型：
--
作者：
Zuo Chuantian;Scully Andrew D.;Yak Doojin;Tan Wenliang;Jiao Xuechen;McNeill Christopher R.;Angmo Dechan;Ding Liming;Gao Mei
2D 有机-无机杂化 Ruddlesden-Popper 钙钛矿最近成为太阳能电池技术中光吸收层的候选材料，这主要是因为与 3D 钙钛矿同类产品相比，它们具有令人印象深刻的操作稳定性。迄今为止报道的用于太阳能电池的高效二维钙钛矿层的制备方法涉及不可扩展的旋涂步骤。在这项工作中，报道了一种简便、无需旋涂、可直接扩展的滴铸方法，用于沉积前驱体溶液，该溶液在空气中自组装成高度定向、均匀的二维钙钛矿薄膜，产生功率转换效率（PCE）高达14.9％的钙钛矿太阳能电池（经认证的PCE在0.078 cm2下为14.33％±0.34）。这是迄今为止采用非旋涂法制造的二维钙钛矿层太阳能电池的最高 PCE。在氮气手套箱中储存超过 5 个月后，电池的 PCE 没有显示出降解的迹象。还首次研究了使用槽模工艺的二维钙钛矿层沉积。使用玻璃基板上的批量狭缝模具涂层或柔性基板上的 R2R 狭缝模具涂层制造的钙钛矿太阳能电池的 PCE 分别为 12.5% 和 8.0%。
2D organic–inorganic hybrid Ruddlesden–Popper perovskites have emerged recently as candidates for the light‐absorbing layer in solar cell technology due largely to their impressive operational stability compared with their 3D‐perovskite counterparts. The methods reported to date for the preparation of efficient 2D perovksite layers for solar cells involve a nonscalable spin‐coating step. In this work, a facile, spin‐coating‐free, directly scalable drop‐cast method is reported for depositing precursor solutions that self‐assemble into highly oriented, uniform 2D‐perovskite films in air, yielding perovskite solar cells with power conversion efficiencies (PCE) of up to 14.9% (certified PCE of 14.33% ± 0.34 at 0.078 cm2). This is the highest PCE to date for a solar cell with 2D‐perovskite layers fabricated by nonspin‐coating method. The PCEs of the cells display no evidence of degradation after storage in a nitrogen glovebox for more than 5 months. 2D‐perovskite layer deposition using a slot‐die process is also investigated for the first time. Perovskite solar cells fabricated using batch slot‐die coating on a glass substrate or R2R slot‐die coating on a flexible substrate produced PCEs of 12.5% and 8.0%, respectively.