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

查看全文 作　　者：Yilun [1,2]Wang;Xing [1]Cheng;Kai [1]Yuan;Yi [1]Wan;Pan [1]Li;Yuhao [1]Deng;Haoran [1]Yu;Xiaolong [1]Xu;Yi [1]Zeng;Wanjin [1]Xu;Yanping [1]Li;Renmin [1,2]Ma;Kenji [3]Watanabe;Takashi [3]Taniguchi;Yu [1,2]Ye;Lun [1,2]Dai 机构地区：[1]State Key Laboratory for Artificial Microstructure & Mesoscopic Physics,School of Physics,Peking University,Beijing 100871,China;[2]Collaborative Innovation Center of Quantum Matter,Beijing 100871,China;[3]National Institute for Materials Science,1-1Namiki,Tsukuba 305-0044,Japan 出　　处：《Science Bulletin》索引2018年第63卷第23期,共7页 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 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. 关 键 词：DETERMINISTIC TRANSFER CsPbI3 NANOCRYSTALS PDMS substrate CVD