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所属单位：材料科学与技术学院

发表刊物：J. Phys. Chem. C

摘要：Low-cost solution-processed scintillation radiation detection materials are pursued urgently in ionization applications. Scintillators are key conversion materials that absorb high-energy X(γ) photons and convert them into UV-visible photons. Bulk mix organic-inorganic hybrid perovskites (CH3NH3PbCl3-XBrX) have been employed to detect X(γ) photons using a photon-photon conversion method. Optical properties were carefully investigated by photoluminescence (PL) spectra, PL lifetime, and X-ray excited luminescence (XEL) spectra at room temperature, which can be tuned with dopant Br concentration. Two XEL peaks centered at around 456 and 479 nm have been observed for the CH3NH3PbCl2.85Br0.15 single crystal scintillator. These two peaks originated from the near band-to-band emission and self-absorption-induced re-emission. Thick crystals are able to enhance the self-absorption induced re-emission, while suppressing the near band-to-band emission. © 2019 American Chemical Society.

ISSN号：1932-7447

是否译文：否

发表时间：2019-06-24

合写作者：Li, Yang,Shao, Wenyi,Ouyang, Xiaoping,Ouyang, Xiao,Zhu, Zhichao,Zhang, Hang,Liu, Bo,N/A

通讯作者：Li, Yang,陈黎阳