Intense single-band red upconversion emission in BiOCl:Er3+ layered semiconductor via co-doping Ho3+  

作　　者：Yuehong Peng Jincai Peng Jiajun Han Tianhui Wang Zhaoyi Yin Jianbei Qiu Qi W ang Zhengwen Yang Zhiguo Song 

机构地区：[1] School of Materials Science and Engineering,Kunming University of Science and Technology,Kunming 650093,China [2] School of Physics and Electronical Science,Chuxiong Normal University,Chuxiong 675000,China [3] Dean's Office,Sichuan University of Arts and Science,Dazhou 635000,China

出　　处：《Journal of Rare Earths》2020年第6期577-583,共7页稀土学报（英文版）

基　　金：the National Natural Science Foundation of China(11874186);the Applied Basic Research Program of Yunnan Province(2017FB079);the Reserve Talents Project of Yunnan Province(2015HB013);the Scientific Research Foundation of the Education Department of Yunnan Province(2018JS452)。

摘　　要：Exploring a new tuning way to facilely realize single-band red emission in trivalent rare-earth ions(RE3+) doped upconversion(UC) materials is still desirable.In this work,the intense single-band red emission is achieved by co-doping only Ho3+in the BiOCl:Er3+ under 1550 nm excitation.In the BiOCl layered host,co-doping Ho3+can further enhance the red emission and simultaneously suppress the green emission of Er3+,and thus obviously improve the red-to-green(R/G) ratio.It is found that Ho3+does not se rve as ene rgy trapping through the 5 I6 state as in traditional UC materials but acts as ET bridge(4 S3/2,2 H11/2(Er3+)→5 F4,5 S2(Ho3+)→4 F9/2(Er3+)).The tuning mechanism of Ho3+is discussed in detail and further confirms through a comparative experiment.Our research gives an unusual perspective to tune the UC behavior of Er3+through co-doping Ho3+,which might be inspiring for achievement of single-band red UC emission.

关 键 词：Single-band red emission BiOCl ER3+ Ho3+ Rare Earths 

分 类 号：TQ422[化学工程]