Moisture is not always bad:H_(2)O accelerates the conversion of DMAPbI_(3) intermediate to CsPbI_(3)for boosting the efficiency of carbon-based perovskite solar cells to over 16%

作     者：Hailiang Wang Huicong Liu Zijing Dong Xueyuan Wei Weiping Li Liqun Zhu Cheng Zhu Yang Bai Haining Chen Hailiang Wang;Huicong Liu;Zijing Dong;Xueyuan Wei;Weiping Li;Liqun Zhu;Cheng Zhu;Yang Bai;Haining Chen

作者机构：School of Materials Science and EngineeringBeihang UniversityBeijing 100191China Beijing Key Laboratory of Construction Tailorable Advanced Functional Materials and Green ApplicationsMIIT Key Laboratory for Low-dimensional Quantum Structure and DevicesExperimental Center of Advanced MaterialsSchool of Materials Science&EngineeringBeijing Institute of TechnologyBeijing 100081China 

出 版 物：《Fundamental Research》 (自然科学基础研究（英文版）)

年 卷 期：2024年第4卷第5期

页      面：1110-1117页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 070301[理学-无机化学] 

基　　金：supported by the National Natural Science Foundation of China(21875013) the Beijing Natural Science Foundation(2182031) 

主　　题：Inorganic perovskite CsPbI_(3) Carbon electrode Solar cells Water 

摘      要：Inorganic CsPbI_(3)perovskite has exhibited great application potential in perovskite solar cells(PSCs)due to its suitable optical bandgap and high chemical ***,the perovskite phases of CsPbI_(3)are not stable at room temperature,where they transition to non-perovskite *** or water has been thought to be the primary factor inducing this phase transition,which should be avoided throughout the procedure of film and device ***,the present study indicates that preparing a precursor solution in humid air is beneficial to the growth of high-quality CsPbI_(3)perovskite to enhance device *** is demonstrated that the incorporation of H2O in the precursor solution from humid air or by intentional addition significantly changes the composition of coordination compounds and increases the amount of low iodine coordination *** a result,the crystallization of dimethylammonium lead iodide(DMAPbI_(3))intermediate is suppressed well,which accelerates its subsequent conversion to CsPbI_(3)***,an oriented CsPbI_(3)perovskite film with improved crystallinity and lower defect density is *** importantly,carbon-based PSCs(C-PSCs)based on the CsPbI_(3)perovskite film achieve an efficiency of 16.05%,a new record for inorganic C-PSCs.