Electron-trapping materials,due to their exceptional ability of energy storage and controllable photon release under external stimulation,have attracted considerable attention in the field of optical information stora...Electron-trapping materials,due to their exceptional ability of energy storage and controllable photon release under external stimulation,have attracted considerable attention in the field of optical information storage(OIS).In this work,Gd_(3)Al_(3)Ga_(2)O_(12):Ce^(3+), Yb^(3+)fluorescent ceramics,were developed using air and vacuum sintering technology.By co-doping Ce^(3+)and Yb^(3+),the trap density was significantly increased by 7.5 times compared to samples containing only Ce^(3+).Vacuum annealing further enhanced trap density by 1.6 times compared to samples sintered solely in air,while generating deep traps(1.44 eV),making Gd_(3)Al_(3)Ga_(2)O_(12):Ce^(3+), Yb^(3+) an excellent OIS medium.This work is expected to facilitate the development of OIS materials.展开更多
Gd_3Ga_5O_ 12(GGG) was synthesized by a co-precipitation method using carbonate as precipitant. TG-DTA and IR spectra indicated that the precursor was alkaline. The weight loss was about 28% during sintering the precu...Gd_3Ga_5O_ 12(GGG) was synthesized by a co-precipitation method using carbonate as precipitant. TG-DTA and IR spectra indicated that the precursor was alkaline. The weight loss was about 28% during sintering the precursor. Sintering temperature was optimized according to XRD results and well-crystallized GGG was obtained by sintering at 1000 ℃ for 3 h. Compared with the solid-state reaction, the carbonate co-precipitation method had the merits of short reaction time, well-crystallization, lower sintering temperature and less volatilization. As a result, volatilization and disproportion of Gd_2O_3 and Ga_2O_3 might be controlled during GGG crystal growth.展开更多
基金supported by the National Key R&D Program of China(Nos.2021YFB2802000 and 2022YFA1204300)the Shanghai Municipal Science and Technology Commission Innovation Action Plan(No.18DZ1100400)+4 种基金the National Natural Science Foundation of China(Nos.52221001,62090035,62175061,and U19A2090)the Key Program of Science and Technology Department of Hunan Province(Nos.2019XK2001 and 2020XK2001)the Key Research and Development Plan of Hunan Province(No.2023GK2012)the Open Project of Key Laboratory of Nanodevices and Applications,Suzhou Institute of Nano-Tech and Nano-Bionics,Chinese Academy of Sciences(No.22ZS01)the Natural Science Foundation of Hunan Province(No.2022JJ30167).
文摘Electron-trapping materials,due to their exceptional ability of energy storage and controllable photon release under external stimulation,have attracted considerable attention in the field of optical information storage(OIS).In this work,Gd_(3)Al_(3)Ga_(2)O_(12):Ce^(3+), Yb^(3+)fluorescent ceramics,were developed using air and vacuum sintering technology.By co-doping Ce^(3+)and Yb^(3+),the trap density was significantly increased by 7.5 times compared to samples containing only Ce^(3+).Vacuum annealing further enhanced trap density by 1.6 times compared to samples sintered solely in air,while generating deep traps(1.44 eV),making Gd_(3)Al_(3)Ga_(2)O_(12):Ce^(3+), Yb^(3+) an excellent OIS medium.This work is expected to facilitate the development of OIS materials.
文摘Gd_3Ga_5O_ 12(GGG) was synthesized by a co-precipitation method using carbonate as precipitant. TG-DTA and IR spectra indicated that the precursor was alkaline. The weight loss was about 28% during sintering the precursor. Sintering temperature was optimized according to XRD results and well-crystallized GGG was obtained by sintering at 1000 ℃ for 3 h. Compared with the solid-state reaction, the carbonate co-precipitation method had the merits of short reaction time, well-crystallization, lower sintering temperature and less volatilization. As a result, volatilization and disproportion of Gd_2O_3 and Ga_2O_3 might be controlled during GGG crystal growth.
