Direct synthesis of high-quality perovskite nanocrystals on a flexible substrate and deterministic transfer

作     者：Yilun Wang Xing Cheng Kai Yuan Yi Wan Pan Li Yuhao Deng Haoran Yu Xiaolong Xu Yi Zeng Wanjin Xu Yanping Li Renmin Ma Kenji Watanabe Takashi Taniguchi Yu Ye Lun Dai 

作者机构：State Key Laboratory for Artificial Microstructure & Mesoscopic PhysicsSchool of PhysicsPeking UniversityBeijing 100871China Collaborative Innovation Center of Quantum MatterBeijing 100871China National Institute for Materials Science1-1NamikiTsukuba 305-0044Japan 

出 版 物：《Science Bulletin》 (科学通报（英文版）)

年 卷 期：2018年第63卷第23期

页      面：1576-1582页

核心收录：

学科分类：07[理学] 08[工学] 

基　　金：supported by the National Natural Science Foundation of China (61875001, 61521004, 61874003, and 11474007) the National Key Research and Development Program of China (2018YFA0306900 and 2017YFA0206301) Beijing Natural Science Foundation (4182028), the National Basic Research Program of China (2013CB921901) and the ‘‘1000 Youth Talent Plan” Fund 

主　　题：Deterministic transfer CsPbI3 nanocrystals PDMS substrate CVD 

摘      要：Solid-state perovskite nanocrystals are promising coherent light sources, as there is optical feedback within the crystal structure. In order to utilize the high performance of perovskites for on-chip applications, or observe new physical phenomena, these crystals must be integrated with pre-fabricated electronic or photonic structures. However, the material s fragility has made the deterministic transfer a great challenge thus far. Here, we report the first deterministic transfer of perovskite nanocrystals with sub-micron accuracy. Cesium lead halide(CsPbI_3) nanocrystals were directly synthesized on flexible polydimethylsiloxane(PDMS) stamps via chemical vapor deposition(CVD) and subsequently transferred onto arbitrary substrates/structures. We demonstrated the transfer of a CsPbI_3 crystalline nanoplate(NP)onto an 8 mm fiber core and achieved single-mode whispering gallery mode lasing. Our method can be extended to a variety of other arbitrary substrates(e.g., electrodes, photonic structures, micromechanical systems), laying the foundations for previously unattainable opportunities in perovskites-based devices.