A Fast Deposition-Crystallization Procedure for Highly Efficient Lead Iodide Perovskite Thin-Film Solar Cells
A Fast Deposition-Crystallization Procedure for Highly Efficient Lead Iodide Perovskite Thin-Film Solar Cells
复制标题
DOI：
10.1002/anie.201405334
复制
发表时间：
2014-09-08
影响因子：
16.6
通讯作者：
Spiccia, Leone
中科院分区：
文献类型：
--
作者：
Xiao, Manda;Huang, Fuzhi;Spiccia, Leone
基于烷基铵碘化铅钙钛矿光吸收剂的薄膜光伏技术最近已成为一种有前景的低成本太阳能采集技术。到目前为止，在这些高效太阳能电池中，钙钛矿层通常是通过气相沉积或两步连续沉积工艺制备的。我们报道这种材料的平整、均匀的薄膜可以通过一种一步的、溶剂诱导的快速结晶方法来沉积，该方法包括旋涂甲基铵碘化铅（CH₃NH₃PbI₃）的二甲基甲酰胺（DMF）溶液，随后立即暴露于氯苯中以诱导结晶。对器件和薄膜的分析表明，钙钛矿薄膜由尺寸可达微米的大晶粒组成。用这些溶液处理的薄膜构建的平面异质结太阳能电池在标准的AM 1.5条件下平均功率转换效率为13.9±0.7%，稳态效率为13%。
Thin-film photovoltaics based on alkylammonium lead iodide perovskite light absorbers have recently emerged as a promising low-cost solar energy harvesting technology. To date, the perovskite layer in these efficient solar cells has generally been fabricated by either vapor deposition or a two-step sequential deposition process. We report that flat, uniform thin films of this material can be deposited by a one-step, solvent-induced, fast crystallization method involving spin-coating of a DMF solution of CH3NH3PbI3 followed immediately by exposure to chlorobenzene to induce crystallization. Analysis of the devices and films revealed that the perovskite films consist of large crystalline grains with sizes up to microns. Planar heterojunction solar cells constructed with these solution-processed thin films yielded an average power conversion efficiency of 13.9 +/- 0.7% and a steady state efficiency of 13% under standard AM 1.5 conditions.