Enhanced X-ray photon response in solution-synthesized CsPbBr3 nanoparticles wrapped by reduced graphene oxide

By Xiangming Liu, Xu Tao, Yulong Li, Zhigang Zang, Xiaoshi Peng, Huiyue Wei, Zhang Weiyi, Feng Wang. Solar Energy Materials and Solar Cells, 2018

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Abstract CsPbBr3 nanoparticles uniformly distributed on reduced graphene oxide (rGO) to form CsPbBr3/rGO nanocomposites are synthesized by a facile method. Their corresponding optical and X-ray photon response are investigated. UV–visible absorption spectra and photoluminescence measurements confirm that loading CsPbBr3 nanoparticles with an even distribution onto rGO surface can enhance the absorption and photon-generated carrier transportation. Thus, a significant enhancement in optical and X-ray photon response is demonstrated in CsPbBr3/rGO nanocomposites as compared with pure CsPbBr3 nanoparticles. Clear conductive switching phenomenon with a state conversion between “on” and “off” is also observed under the intermittent x-ray exposure. These results may provide a new potential application of CsPbBr3/rGO nanocomposites for X-ray photon detection.

Subfields: Electrical and Electronic Engineering, Materials Chemistry

View Paper: https://www.semanticscholar.org/paper/79820ed17d7c912c3884af932744d80855233e5c