Direct drop-casting synthesis of all-inorganic lead and lead-free halide perovskite microcrystals for high-performance photodetectors

作     者：Zhengxun Lai You Meng Fei Wang Xiuming Bu Wei Wang Pengshan Xie Weijun Wang Chuntai Liu SenPo Yip Johnny C.Ho Zhengxun Lai;You Meng;Fei Wang;Xiuming Bu;Wei Wang;Pengshan Xie;Weijun Wang;Chuntai Liu;SenPo Yip;Johnny C.Ho

作者机构：Department of Materials Science and EngineeringCity University of Hong KongKowloonHong Kong 999077China State Key Laboratory of Luminescence and ApplicationsChangchun Institute of OpticsFine Mechanics and PhysicsChinese Academy of SciencesChangchun 130021China State Key Laboratory of Terahertz and Millimeter WavesCity University of Hong KongKowloonHong Kong 999077China Key Laboratory of Advanced Materials Processing&Mold(Zhengzhou University)Ministry of EducationZhengzhou 450002China Institute for Materials Chemistry and EngineeringKyushu UniversityFukuoka 816–8580Japan 

出 版 物：《Nano Research》 (纳米研究（英文版）)

年 卷 期：2022年第15卷第4期

页      面：3621-3627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：We acknowledge the General Research Fund(No.CityU 11306520) the Theme based Research(No.T42-103/16-N)of the Research Grants Council of Hong Kong,China the Foshan Innovative and Entrepreneurial Research Team Program(No.2018IT100031) 

主　　题：halide perovskite drop-casting photodetector CsPbBr_(3) Cs_(3)Sb_(2)I_(9) 

摘      要：Due to the exciting photoelectric properties,better stability,and environmental-friendly nature,all-inorganic halide perovskites(AIHPs),especially the lead-free perovskites,have attracted worldwide ***,the film quality of AIHPs fabricated by typical spin-coating and subsequent high-temperature annealing is still not satisfactory,restricting their further ***,we demonstrate a simple low-temperature solution-processed drop-casting method to achieve highly-crystalline cubic CsPbBr_(3)and lead-free layer-structured Cs_(3)Sb_(2)I_(9)microcrystals(MCs).This drop-casting technique not only consumes the less amount of precursor solution but also eliminates the high-temperature annealing as compared with those of spin *** these MCs are configured into photodetectors,they exhibit superior device performance,which is in distinct contrast to the one of spin-coated ***,the responsivity of CsPbBr_(3)MCs is found to be as large as 8,990 mA/W,being 13 times larger than the spin-coated films and even better than many state-of-the-art solution-processed AIHPs *** device performance enhancement is attributed to the better film quality and phase purity obtained by the drop-casting *** these results can evidently fill the“technology gapfor further enhancing the material quality of solution-processed AIHPs and breaking down the barriers that hinder the development of AIHPs based optoelectronic devices.