Efficient Near-infrared Down-conversion Phosphor of Ce^(3+)/Yb^(3+)Co-doped La3Ga5SiO14 and Its Spectral Structural Modulation  

作　　者：YU Wan-Jun GONG Xing-Hong QIN Hao-Ran 虞万军;龚兴红;秦皓然(College of Chemistry,Fuzhou University,Fuzhou 350116,China;Key Laboratory of Optoelectronic Materials Chemistry and Physics,Fujian Institute of Research on the Structure of Matter,Chinese Academy of Sciences,Fuzhou 350002,China;Fujian Science&Technology Innovation Laboratory for Optoelectronic Information of China,Fuzhou 350108,China)

机构地区：[1]College of Chemistry,Fuzhou University,Fuzhou 350116,China [2]Key Laboratory of Optoelectronic Materials Chemistry and Physics,Fujian Institute of Research on the Structure of Matter,Chinese Academy of Sciences,Fuzhou 350002,China [3]Fujian Science&Technology Innovation Laboratory for Optoelectronic Information of China,Fuzhou 350108,China

出　　处：《Chinese Journal of Structural Chemistry》2021年第9期1194-1204,1110,共12页结构化学（英文）

基　　金：the Ministry of Science and Technology of the People’s Republic of China(2016YFB0701002);Chinese Academy of Sciences(KFJ-STS-QYZX-069,XDB20000000);Natural Science Foundation of Fujian Province(2019J01127)。

摘　　要：A series of near-infrared(NIR)down-conversion phosphors of La_(3)Ga_(5)SiO_(14)(LGS):Ce^(3+)/Yb^(3+)were synthesized via high-temperature solid-state reaction.Under excitation at 345 nm,the phosphors show strong NIR emission around 978 nm,which matches well with the optimal spectral response of crystalline silicon(c-Si)solar cells.The emission spectra and decay curves were used to demonstrate the energy transfer from Ce^(3+)to Yb^(3+).The energy transfer mechanism was discussed in detail,indicating that the energy transfer from Ce^(3+)to Yb^(3+)is dominated by a single photon process,and the energy transfer efficiency is up to 51%.In addition,La_(3)Ga_(5-z)Al_(2)SiO_(14)(z=0,1,2,3):Ce^(3+)/Yb^(3+)were also synthesized.The NIR emission intensity of La_(3)Ga_(2)Al_(3)SiO_(14):1%Ce^(3+)/5%Yb^(3+)is 4.6 times that of LGS:1%Ce^(3+)/5%Yb^(3+),and the thermal relaxation was used to explain this phenomenon.The results show that La_(3)Ga_(5-z)Al_(2)SiO_(14)(z=0,1,2,3):1%Ce^(3+)/5%Yb^(3+)phosphors have the potential to increase the conversion efficiency of c-Si solar cells.

关 键 词：Ce^(3+)/Yb^(3+) DOWN-CONVERSION PHOSPHOR ions substitution solar cells 

分 类 号：TM914.4[电气工程—电力电子与电力传动] TQ422[化学工程]