Laboratory of Photonics and Interfaces, Ecole Polytechnique Fédérale de Lausanne , Lausanne CH-1015, Switzerland.
Acc Chem Res. 2017 Mar 21;50(3):487-491. doi: 10.1021/acs.accounts.6b00492.
Recently, metal halide perovskite solar cells (PSCs) of the general formular ABX where A is a monovalent cation, that is, methylammonium (MA) CHNH, formamidinium CH(NH), Cs, or Rb, B stands for Pb(II) or Sn(II), and X for iodide or bromide have achieved solar to electric power conversion efficiencies (PCEs) above 22%, exceeding the efficiency of the present market leader polycrystalline silicon while using 1000 times less light harvesting material and simple solution processing for their fabrication. The top performing devices all employ formulations containing a mixture of up to four A cations and iodide as well as a small fraction of bromide as anion, whose emergence will be described in this Commentary. Apart from leading the current PV efficiency race, these new perovskite materials exhibit intense electroluminescence and an extraordinarily high stability under heat and light stress.
最近，通式为 ABX 的金属卤化物钙钛矿太阳能电池（PSCs）取得了突破，其中 A 是一价阳离子，例如甲脒（MA）CHNH、甲脒（FA）CH(NH)、铯（Cs）或铷（Rb），B 代表铅（Pb）或锡（Sn），X 代表碘化物或溴化物。这些钙钛矿太阳能电池的光电转换效率（PCE）超过 22%，超过了目前市场领先的多晶硅，同时仅使用千倍以下的光捕获材料，并采用简单的溶液处理工艺进行制备。表现最佳的器件都采用了包含至多四种 A 阳离子和碘化物以及少量溴化物作为阴离子的混合物配方，本文将对其进行描述。除了引领当前的光伏效率竞赛外，这些新型钙钛矿材料还表现出强烈的电致发光性能和在热和光应力下的极高稳定性。
