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Polarized Optoelectronics of CsPbX3 (X = Cl, Br, I) Perovskite Nanoplates with Tunable Size and Thickness

Sheng, XX (Sheng, Xuexi)[ 1 ] ; Chen, GY (Chen, Gaoyu)[ 2 ] ; Wang, C (Wang, Chong)[ 1 ] ; Wang, WQ (Wang, Weiqi)[ 1 ] ; Hui, JF (Hui, Junfeng)[ 2 ] ; Zhang, Q (Zhang, Qi)[ 3 ] ; Yu, KH (Yu, Kehan)[ 3 ] ; Wei, W (Wei, Wei)[ 3 ] ; Yi, MD (Yi, Mingdong)[ 3 ] ; Zhang, M (Zhang, Mian)[ 4,5 ] ; Deng, Y (Deng, Yu)[ 4,5 ] ; Wang, P (Wang, Peng)[ 4,5 ] ; Xu, XX (Xu, Xiangxing)[ 1 ]*（徐翔星）; Dai, ZH (Dai, Zhihui)[ 1 ] ; Bao, JC (Bao, Jianchun)[ 1 ]*（包建春）; Wang, X (Wang, Xun)[ 6 ] *

[ 1 ] Nanjing Normal Univ, Sch Chem & Mat Sci, Jiangsu Key Lab Biofunct Mat, Nanjing 210046, Jiangsu, Peoples R China

[ 2 ] Northwest Univ Xian, Shaanxi Key Lab Degradable Biomed Mat, Shaanxi R&D Ctr Biomat & Fermentat Engn, Sch Chem & Engn, Xian 710069, Shaanxi, Peoples R China

[ 3 ] Nanjing Univ Posts & Telecommun, Sch Optoelect Engn, Nanjing 210023, Jiangsu, Peoples R China

[ 4 ] Nanjing Univ, Natl Lab Solid State Microstruct, Coll Engn & Appl Sci, Nanjing 210093, Jiangsu, Peoples R China

[ 5 ] Nanjing Univ, Collaborat Innovat Ctr Adv Microstruct, Nanjing 210093, Jiangsu, Peoples R China

[ 6 ] Tsinghua Univ, Dept Chem, Key Lab Organ Optoelect & Mol Engn, Beijing 100084, Peoples R China

ADVANCED FUNCTIONAL MATERIALS,201805,28,19

Low dimensional semiconductor nanomaterials have shown their tailorable properties for a variety of promising applications in decades. Here a general strategy to synthesize all-inorganic CsPbX3 (X = Cl, Br, I or their mixture) perovskite 2D nanoplates by introducing additional metal halides MX'(2) or MX'(3) (M = Cu, Zn, Al or Pb, etc.; X' = Cl, Br or I) is reported. These CsPbX3 perovskite nanoplates have uniform thickness and tunable size, which can be feasibly controlled by the component and ratio of the metal halides, temperature, time, and ligands. The well-defined morphology of the nanoplates makes them ideal building blocks for the self-assembly in the face-to-face and column-by-column arrangement. Compared to the optically isotropic CsPbX3 nanocubes, the 2D CsPbX3 nanoplates exhibit remarkable polarized UV-vis absorption and photoluminescence not only in liquid solvent and solid resin matrix, but also in self-assembled films. An optoelectronic photodetector sensitive for linear polarized light is fabricated to demonstrate the proof-of-concept.

文章鏈接：

https://onlinelibrary.wiley.com/doi/abs/10.1002/adfm.201800283