title: [Near-infrared quantum cutting downconversion luminescence of Yb3+ ion cooperative energy transferred from YVO4 matrix donor].
abstract: The present manuscript researches the near infrared quantum cutting luminescence phenomena of Yb3+ ion in YVO4 crystal matrix The luminescence spectra, excitation spectra and fluorescence lifetimes were measured. It was found that the excitation of YVO4 crystal matrix energy band by 322.0 nm light can result in the effective secondary cooperative energy transfer of Yba+ ion from the YVO4 crystal matrix It results in the intense 985.5 nm 2F(5/2)-->2F(7/2) near infrared quantum cutting luminescence of Yb3+ ion. Meanwhile, the 430.O nm luminescence intensity of YVO4 crystal matrix decreases greatly. From the experimental measurements, it was found that the lifetime of 430.0 nm fluorescence of (A) Yb(1.5) : YVO4 crystal is tauA = 3.785 s and that of (B) YVO4 crystal is tauB=22.72 s. It was found also that the theoretical efficiency up limit of quantum cutting of (A) Yb(1.5) : YVO4 crystal is about eta1.5%=183-3%.
authors.forename: Xiao-bo
authors.initials: XB
authors.lastname: Chen
authors.forename: Gu
authors.initials: G
authors.lastname: Zhou
authors.forename: Yong-fen
authors.initials: YF
authors.lastname: Zhou
authors.forename: Zheng-long
authors.initials: ZL
authors.lastname: Wu
authors.forename: Yu-ying
authors.initials: YY
authors.lastname: Guo
authors.forename: Shui-feng
authors.initials: SF
authors.lastname: Wang
authors.forename: Qiu-yan
authors.initials: QY
authors.lastname: Zou
authors.forename: Qiu-yan
authors.initials: QY
authors.lastname: Zhuang
authors.forename: Xiao-duan
authors.initials: XD
authors.lastname: Chen
authors.forename: Chun-mi
authors.initials: CM
authors.lastname: Li
authors.forename: Wen-ting
authors.initials: WT
authors.lastname: Yao
authors.forename: Huan-li
authors.initials: HL
authors.lastname: Cheng