TY - JOUR
T1 - Broadband, Enhanced, and Antithermally Quenched Near-Infrared Phosphors via a Cosubstitution Approach
AU - Ma, Qianrui
AU - Wang, Ting
AU - Gao, Wei
AU - Liu, Bitao
AU - Zhang, Hao
AU - Cui, Zhenzhen
AU - Guo, Haihong
AU - Xiu, Liang
AU - Wang, Shaoqing
AU - Li, Ziyang
AU - Guo, Longchao
AU - Yu, Siufung
AU - Yu, Xue
AU - Xu, Xuhui
AU - Qiu, Jianbei
N1 - Funding Information:
This work was supported by the Excellent Youth Project of Yunnan Province Applied Basic Research Project (2019FI001), the Key Project of Yunnan Provincial Natural Science Foundation (202101AT070126), and the National Natural Science Foundation of China (61775187, 61965012, 12064022).
Funding Information:
This work was supported by the Excellent Youth Project of Yunnan Province Applied Basic Research Project (2019FI001), the Key Project of Yunnan Provincial Natural Science Foundation (202101AT070126) and the National Natural Science Foundation of China (61775187, 61965012 12064022).
Publisher Copyright:
© 2021 American Chemical Society.
PY - 2021/8/2
Y1 - 2021/8/2
N2 - Wearable biosensing and food safety inspection devices with high thermal stability, high brightness, and broad near-infrared (NIR) phosphor-converted light-emitting diodes (pc-LEDs) could accelerate the next-generation NIR light applications. In this work, NIR La3-xGdxGa5GeO14:Cr3+ (x = 0 to 1.5) phosphors were successfully fabricated by a high-temperature solid-state method. Here, by doping Gd3+ ions into the La3+ sites in the La3Ga5GeO14 matrix, a 7.9-fold increase in the photoluminescence (PL) intensity of the Cr3+ ions, as well as a remarkably broadened full width at half-maximum (FWHM) of the corresponding PL spectra, is achieved. The enhancements in the PL, PLE intensity, and FWHM are attributed to the suppression of the nonradiative transition process of Cr3+ when Gd3+ ions are doped into the host, which can be demonstrated by the decay curves. Moreover, the La1.5Gd1.5Ga5GeO14:Cr3+ phosphor displays an abnormally negative thermal phenomenon that the integral PL intensity reaches 131% of the initial intensity when the ambient temperature increases to 160 °C. Finally, the broadband NIR pc-LED was fabricated based on the as-explored La1.5Gd1.5Ga5GeO14:Cr3+ phosphors combined with a 460 nm chip, and the potential applications for the broadband NIR pc-LEDs were discussed in detail.
AB - Wearable biosensing and food safety inspection devices with high thermal stability, high brightness, and broad near-infrared (NIR) phosphor-converted light-emitting diodes (pc-LEDs) could accelerate the next-generation NIR light applications. In this work, NIR La3-xGdxGa5GeO14:Cr3+ (x = 0 to 1.5) phosphors were successfully fabricated by a high-temperature solid-state method. Here, by doping Gd3+ ions into the La3+ sites in the La3Ga5GeO14 matrix, a 7.9-fold increase in the photoluminescence (PL) intensity of the Cr3+ ions, as well as a remarkably broadened full width at half-maximum (FWHM) of the corresponding PL spectra, is achieved. The enhancements in the PL, PLE intensity, and FWHM are attributed to the suppression of the nonradiative transition process of Cr3+ when Gd3+ ions are doped into the host, which can be demonstrated by the decay curves. Moreover, the La1.5Gd1.5Ga5GeO14:Cr3+ phosphor displays an abnormally negative thermal phenomenon that the integral PL intensity reaches 131% of the initial intensity when the ambient temperature increases to 160 °C. Finally, the broadband NIR pc-LED was fabricated based on the as-explored La1.5Gd1.5Ga5GeO14:Cr3+ phosphors combined with a 460 nm chip, and the potential applications for the broadband NIR pc-LEDs were discussed in detail.
UR - https://www.scopus.com/pages/publications/85111505826
U2 - 10.1021/acs.inorgchem.1c01588
DO - 10.1021/acs.inorgchem.1c01588
M3 - Journal article
C2 - 34284577
AN - SCOPUS:85111505826
SN - 0020-1669
VL - 60
SP - 11616
EP - 11625
JO - Inorganic Chemistry
JF - Inorganic Chemistry
IS - 15
ER -