Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Jiangsu National Synergistic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University (NanjingTech) , 30 South Puzhu Road, Nanjing 211800, China.
State Key Laboratory of ASIC and System, SIST, Fudan University , Shanghai 200433, China.
ACS Appl Mater Interfaces. 2017 Oct 25;9(42):36810-36816. doi: 10.1021/acsami.7b11168. Epub 2017 Oct 13.
One-step solution process is the simplest method to fabricate organic-inorganic metal halide perovskite thin films, which however does not work well when employed in the planar-heterojunction (PHJ) solar cells due to the generally poor film morphology. Here we show that hydrazinium chloride can be used as an additive in the precursor solution to produce perovskite films featuring higher coverage and better crystallinity. The light absorption ability and charge carrier lifetime are both significantly improved accordingly. Under the optimal additive ratio, the average power conversion efficiency (PCE) of the inverted PHJ perovskite solar cells greatly increases by as much as 70%, and the champion device shows a satisfying PCE of 12.66%. These results suggest that NHCl is a promising additive for fabricating high-efficiency perovskite solar cells via one-step method, which could be of interest in the future commercial solar cell industry.
一步溶液法是制备有机-无机金属卤化物钙钛矿薄膜最简单的方法，但由于薄膜形貌通常较差，因此在平面异质结（PHJ）太阳能电池中效果不佳。在这里，我们表明，在钙钛矿前驱体溶液中加入盐酸肼可以得到具有更高覆盖率和更好结晶度的钙钛矿薄膜。相应地，光吸收能力和载流子寿命都得到了显著提高。在最佳添加剂比例下，倒置 PHJ 钙钛矿太阳能电池的平均光电转换效率（PCE）大大提高了 70%，冠军器件的 PCE 达到了 12.66%。这些结果表明，NHCl 是通过一步法制备高效钙钛矿太阳能电池的一种很有前途的添加剂，这可能在未来的商业太阳能电池产业中引起关注。
