Broadening and enhancing emission of Cr^(3+) simultaneously by co-doping Yb^(3+) in Ga1.4ln0.6SnO5  

作　　者：Shuang Zhao Zhongfei Mu Lulu Lou Shuwen Yuan Min Liao Qiuming Lin Daoyun Zhu Fugen Wu 

机构地区：[1]School of Materials and Energy,Guangdong University of Technology,Guangzhou,510006,China [2]Guangdong Provincial Key Laboratory of Information Photonics Technology Guangdong University of Technology,Guangzhou,510006,China [3]Experimental Teaching Department,Guangdong University of Technology,Guangzhou,510006,China

出　　处：《Journal of Rare Earths》2023年第12期1895-1903,I0003,共10页稀土学报（英文版）

基　　金：Project supported by the National Natural Science Foundation of China (62127816);the Guangdong Introducing Innovative and Entrepreneurial Teams of "The Pearl River Talent Recruitment Program"(2019ZT08X340)。

摘　　要：Cr^(3+)doped broadband near-infrared(NIR) emitting phosphors are currently the focus of research.Researchers have developed a variety of strategies to achieve broad and strong NIR emission,However,it is a conundrum to simultaneously broaden and enhance the emission of Cr^(3+)with a single strategy,In this work,we solved this problem by co-doping Yb^(3+).Under 452 nm excitation,Ga_(1.4)In_(0.6)SnO_(5)(GISO):0.01Cr^(3+)shows ultrabroadband NIR emission covering 650-1300 nm with a peak of 884 nm,The full width half maximum(FWHM) of the emission is 215 nm and the internal quantum yield(IQY) is 25%.This indicates that the double sites occupation strategy is favorable to achieve ultra-broadband NIR emission.The co-doping of Yb^(3+)can effectively broaden and enhance the emission of Cr^(3+).The FWHM for GISO:0.01Cr^(3+),0.002Yb^(3+)extends to 245 nm,and the IQY increases to 28%.Further increasing the concentration of Yb^(3+)to 0.005,the IQY is lifted to 32%.Finally,a phosphor-co nverted light emitting diode(pc-LED) was prepared by integrating the GISO:0.01Cr^(3+),0.002Yb^(3+)with a blue light chip.Under the current drive of 40 mA,the maximum output power of pc-LED is 4.54 mW,and the photoelectric conversion efficiency is 4.12%.These results indicate that Yb^(3+)ions can simultaneously broaden the emission band and improve the emission efficiency.This work provides an effective strategy for the design of efficient broadband NIR phosphors in the future.

关 键 词：Cr^(3+) ULTRA-BROADBAND NEAR-INFRARED Yb^(3+) Rare earths 

分 类 号：TQ422[化学工程]