摘要
Hybrid organic–inorganic perovskite thin films have attracted much attention in optoelectronic and information fields because of their intriguing properties. Due to quantum confinement effects, ultrathin films in nm scale usually show special properties. Here, we report on the growth of methylammonium lead iodide(MAPbI_(3)) ultrathin films via co-deposition of PbI_2 and CH_3NH_3I(MAI) on chemical-vapor-deposition-grown monolayer MoS_(2) as well as the corresponding photoluminescence(PL) properties at different growing stages. Atomic force microscopy and scanning electron microscopy measurements reveal the MoS_(2) tuned growth of MAPbI_(3) in a Stranski–Krastanov mode. PL and Kelvin probe force microscopy results confirm that MAPbI_(3) /MoS_(2) heterostructures have a type-Ⅱ energy level alignment at the interface. Temperaturedependent PL measurements on layered MAPbI_(3) (at the initial stage) and on MAPbI_(3) crystals in averaged size of 500 nm(at the later stage) show rather different temperature dependence as well as the phase transitions from tetragonal to orthorhombic at 120 and 150 K, respectively. Our findings are useful in fabricating MAPbI_(3) /transition-metal dichalcogenide based innovative devices for wider optoelectronic applications.
作者
游思雯
邵子依
郭晓
蒋俊杰
刘金鑫
王凯
李明君
欧阳方平
邓楚芸
宋飞
孙家涛
黄寒
Siwen You;Ziyi Shao;Xiao Guo;Junjie Jiang;Jinxin Liu;Kai Wang;Mingjun Li;Fangping Ouyang;Chuyun Deng;Fei Song;Jiatao Sun;Han Huang(Hunan Key Laboratory of Super-Microstructure and Ultrafast Process,School of Physics and Electronics,Central South University,Changsha 410083,China;College of Arts and Science,National University of Defense Technology,Changsha 410073,China;Key Laboratory of Interfacial Physics and Technology,Shanghai Institute of Applied Physics,Chinese Academy of Sciences,Shanghai 201000,China;School of Information and Electronics,MIIT Key Laboratory for Low-Dimensional Quantum Structure and Devices,Beijing Institute of Technology,Beijing 100081,China)
基金
Project supported by the National Natural Science Foundation of China (Grant Nos.11874427 and 11804395)
the Fundamental Research Funds for the Central Universities of Central South University (Grant No.2020zzts377)。
