Luminescent Properties of Ca_(5)Ga_(6)O_(14)∶Eu^(2+)and Its Application to Warm White LEDsOA
Eu^(2+)can be excited by a broad blue light band and exhibits characteristics of broad wavelength emission.Due to the significant influence of the crystal field environment on Eu^(2+)ions,selecting appropriate host materials or adjusting host components can regulate the emission properties of Eu^(2+).This approach also enables the phosphor to be highly compatible with blue light chips,compensating for the red spectral deficiency in commercial white LEDs and enhancing the lighting quality of white LEDs.This study selected the gallate Ca_(5)Ga_(6)O_(14)as the matrix and synthesized Eu^(2+)-doped red phosphor via a high temperature solid-state method.The luminescence properties were optimized by employing an Al3+ion substitution strategy to replace Ga3+cations in the host,and the quantum efficiency can reach 79.2%,and the luminous intensity at 423 K attained 60%of room temperature.By integrating the Ca_(5)Ga_(5.8)Al_(0.2)O_(14)∶0.01Eu^(2+)red phosphor with the commercial yellow phosphor Y3(Al,Ga)_(5)O_(12)∶Ce^(3+)and a blue light chip,a white LED device was fabricated,which exhibits a color rendering index(CRI)of 95.5 and a correlated color temperature(CCT)of 4002 K.This demonstrates the promising application prospects of the red phosphor in the field of white light LEDs.
KANG Mengyi;WANG Dawei;ZHAO Jinxin;WANG Zhijun;HAN Xuping;ZHANG Guodong;SUO Hao;YANG Zhiping;LI Panlai
Hebei Key Laboratory of Optic-electronic Information and Materials,College of Physics Science&Technology,Hebei University,Baoding 071002,ChinaHebei Key Laboratory of Semiconductor Lighting and Display Critical Materials,Hebei Ledphor Optoelectronics Technology Co.,LTD.,Baoding 071000,ChinaHebei Key Laboratory of Semiconductor Lighting and Display Critical Materials,Hebei Ledphor Optoelectronics Technology Co.,LTD.,Baoding 071000,ChinaHebei Key Laboratory of Optic-electronic Information and Materials,College of Physics Science&Technology,Hebei University,Baoding 071002,ChinaHebei Key Laboratory of Optic-electronic Information and Materials,College of Physics Science&Technology,Hebei University,Baoding 071002,ChinaHebei Key Laboratory of Optic-electronic Information and Materials,College of Physics Science&Technology,Hebei University,Baoding 071002,ChinaHebei Key Laboratory of Optic-electronic Information and Materials,College of Physics Science&Technology,Hebei University,Baoding 071002,ChinaHebei Key Laboratory of Optic-electronic Information and Materials,College of Physics Science&Technology,Hebei University,Baoding 071002,ChinaHebei Key Laboratory of Optic-electronic Information and Materials,College of Physics Science&Technology,Hebei University,Baoding 071002,China
数理科学
Eu^(2+)red phosphoroxidewhite light-emitting diodes
《发光学报》 2026 (7)
P.1159-1170,12
Supported by National Natural Science Foundation of China(51902080)Higher Education Scientific Research Project of Hebei Province(JCZX2026030)。
评论