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		题名	作者	年代	出处	被引量
	1	Enhanced perovskite electronic properties via A-site cation engineering显示文摘Organic-inorganic halide perovskites have emerged as excellent candidates for low-cost photovoltaics and optoelectronics.While the predominant recent trend in designing perovskites for efficient and stable solar cells has been to mix different A-site cations,the role of A-site cations is still limited to tune the lattice and bandgap of perovskites.Herein we compare the optoelectronic properties of acetamidinum(Ace)and guanidinium(Gua)mixed methylammonium lead iodide perovskites and shed a light on the hidden role of A-site cation on the carrier mobility of mixed-cation lead iodide perovskites.The cations do not affect the bandgap of the perovskites since the orbitals from Ace and Gua do not contribute to the band edges of the material.However,the mobility of the Ace mixed perovskite is significantly enhanced to be an order of magnitude higher than that of the pristine perovskite.We apply the Ace mixed perovskite in hole-conductor-free printable mesoscopic perovskite solar cells and obtain a stabilized PCE of over 18%(certified 17.7%),which is the highest certified efficiency so far.	Xufeng Xiao Yanmeng Chu Chunyu Zhang Zhihui Zhang Zexiong Qiu Cheng Qiu Huaixing Wang Anyi Mei Yaoguang Rong Gengzhao Xu Yue Hu Hongwei Han	2021	Fundamental Research2021，1，4：	2
	2	Unveiling the effect of amino acids on the crystallization pathways of methylammonium lead iodide perovskites显示文摘Multifunctional additives are widely used to improve crystallization and to passivate defects in perovskite solar cells. The roles of these additives are usually related to the various functional groups contained in such additives. Here, we introduce a serious of analogues of amino acids into methylammonium lead iodide perovskites and find they play different roles in the crystallization process despite the fact that these additives share exactly the same terminal groups, namely one amino group and one carboxyl group. The corresponding crystallization pathways are established for the first time via monitoring the time-resolved phase formation and transformation. We find that avoiding the rapid formation of perovskites from precursor solution can facilitate the uniform nucleation and growth of perovskite crystals with enhanced crystallinity and reduced defects. Further, we find the different crystallization behaviors probably arise from the inherent structural characteristic of these additives, leading to different interactions in the precursors. This study unveils the effects of amino acids on the liquid–solid crystallization process and helps better understand the role of multifunctional additives beyond their functional groups.	Wenhao Zhang Jiankang Du Weihua Zhang Yanmeng Chu Anyi Mei Yaoguang Rong Xinyu Gao Hongwei Han Yue Hu	2022	Journal of Energy Chemistry2022，31，6：	0

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