Adnan Muhammad, Irshad Zobia, Lee Jae Kwan
Department of Chemistry, Graduate School, Chosun University Gwangju 61452 Republic of Korea
Department of Chemistry Education, Chosun University Gwangju 61452 Republic of Korea.
RSC Adv. 2020 Aug 5;10(48):29010-29017. doi: 10.1039/d0ra06074g. eCollection 2020 Aug 3.
Sequential all-dip-coating deposition of (CH)NPbI Cl perovskite materials was conducted in an aqueous nonhalide lead precursor solution, which was followed by that in a (CH)NI and (CH)NCl mixed solution as part of a facile, cost-effective, and environmentally benign manufacturing process for high-efficiency perovskite solar cells. The (CH)NPbI Cl perovskite layers deposited the proposed process were constructed with a Cl/I ratio below ∼3%, indicating the partial insertion of Cl into the (CH)NPbI perovskite lattice. The amount of Cl inserted was readily modulated by varying the (CH)NCl concentration in the (CH)NI/(CH)NCl mixed solution. Incorporating a small amount of Cl led to significant improvements in the surface morphology and crystallinity of the perovskite layer as compared to (CH)NPbI fabricated under the same conditions. The perovskite solar cell devices with these (CH)NPbI Cl perovskite films exhibited superior device performances and stabilities, resulting in an outstanding power conversion efficiency of ∼15.3%. Results show that the fabrication of (CH)NPbI Cl perovskite material with an aqueous nonhalide lead precursor is more efficient than conventional spin-casting approach with detrimental organic solvents.
在水性非卤化铅前驱体溶液中进行（CH）NPbI₃Cl钙钛矿材料的连续全浸涂沉积，随后在（CH）₃NI和（CH）₃NCl混合溶液中进行沉积，这是一种用于高效钙钛矿太阳能电池的简便、经济高效且环境友好的制造工艺的一部分。通过所提出的工艺沉积的（CH）₃NPbI₃Cl钙钛矿层的Cl/I比低于约3%，表明Cl部分插入到（CH）₃NPbI钙钛矿晶格中。通过改变（CH）₃NI/（CH）₃NCl混合溶液中（CH）₃NCl的浓度，可以很容易地调节Cl的插入量。与在相同条件下制备的（CH）₃NPbI相比，掺入少量的Cl导致钙钛矿层的表面形貌和结晶度有显著改善。具有这些（CH）₃NPbI₃Cl钙钛矿薄膜的钙钛矿太阳能电池器件表现出优异的器件性能和稳定性，功率转换效率高达约15.3%。结果表明，用水性非卤化铅前驱体制备（CH）₃NPbI₃Cl钙钛矿材料比使用有害有机溶剂的传统旋涂方法更有效。
