Kim Hansol, Jeong Hanbin, Lee Jae Kwan
Department of Carbon Materials/Chemistry Education, Chosun University, Gwangju, 501-759, Republic of Korea.
Chem Asian J. 2016 Sep 6;11(17):2399-405. doi: 10.1002/asia.201600722. Epub 2016 Aug 8.
A processing additive dripping (PAD) approach to forming highly efficient (CH3 NH3 )PbI3 (MAPbI3 ) perovskite layers was investigated. A MAPbI3 (CB/DIO) perovskite film fabricated by this approach, which included briefly dripping chlorobenzene incorporating a small amount of diiodooctane (DIO) during casting of a MAPbI3 perovskite precursor dissolved in dimethylformamide, exhibited superior smooth, uniform morphologies with high crystallinity and large grains and revealed completely homogeneous surface coverage. The surface coverage and morphology of the substrate significantly affected the photovoltaic performance of planar heterojunction (PHJ) perovskite solar cells (PrSCs), resulting in a power conversion efficiency of 11.45 % with high open-circuit voltage of 0.91 V and the highest fill factor of 80.87 %. Moreover, the PAD approach could effectively provide efficient MAPbI3 (CB/DIO) perovskite layers for highly efficient, reproducible, uniform PHJ PrSC devices without performance loss or variation even over larger active areas.
研究了一种用于形成高效（CH3NH3）PbI3（MAPbI3）钙钛矿层的加工添加剂滴涂（PAD）方法。通过这种方法制备的MAPbI3（CB/DIO）钙钛矿薄膜，即在溶解于二甲基甲酰胺的MAPbI3钙钛矿前驱体浇铸过程中短暂滴涂含有少量二碘辛烷（DIO）的氯苯，呈现出优异的光滑、均匀形态，具有高结晶度和大晶粒，并显示出完全均匀的表面覆盖率。基底的表面覆盖率和形态显著影响平面异质结（PHJ）钙钛矿太阳能电池（PrSCs）的光伏性能，从而实现了11.45%的功率转换效率，具有0.91 V的高开路电压和80.87%的最高填充因子。此外，PAD方法可以有效地为高效、可重复、均匀的PHJ PrSC器件提供高效的MAPbI3（CB/DIO）钙钛矿层，即使在更大的有源区域也不会有性能损失或变化。
