title: Enhanced broadband excited upconversion luminescence in Ho-doped glasses by codoping with bismuth.
abstract: We report enhanced green and red upconversion (UC) luminescence in Ho3+-doped oxyfluoride germanate glass by introducing bismuth near-infrared active centers as sensitizers. The UC excitation bands at 750 and 970 nm show a full width at half-maximum of 20 and 45 nm, respectively. Energy transfer from sensitizers, the excited-state absorption, and phonon-coupled absorption of Ho3+ jointly contribute to the enhanced UC luminescence. Our approach provides an efficient methodology to broaden the excitation bandwidth of UC luminescent materials, which may have the potential for promising application in solar cells.
authors: Beibei
authors: B
authors: Xu
authors: Gongxun
authors: G
authors: Bai
authors: Juechen
authors: J
authors: Wang
authors: Qiangbing
authors: Q
authors: Guo
authors: Dezhi
authors: D
authors: Tan
authors: Weibo
authors: W
authors: Chen
authors: Xiaofeng
authors: X
authors: Liu
authors: Shifeng
authors: S
authors: Zhou
authors: Jianhua
authors: J
authors: Hao
authors: Jianrong
authors: J
authors: Qiu
mesh_terms: D001729:Bismuth / Q000737:chemistry* / Q000528:radiation effects; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005898:Glass / Q000737:chemistry* / Q000528:radiation effects; D006695:Holmium / Q000737:chemistry* / Q000528:radiation effects; D008029:Lighting / Q000295:instrumentation*; D008163:Luminescent Measurements / Q000295:instrumentation*; D008422:Materials Testing
chemical_list: D001729:Bismuth; D006695:Holmium