The Influence of Junction Temperature on the White LED Spectral Characteristics of the Mixture of the DCJTB and YAG∶Ce3+
LIANG Tian-jing1, ZHANG Fang-hui1, QU Shao-jun2, HAN Liang1, QIU Xi-zhen1
1. College of Electric and Communication, Shaanxi University of Science and Technology, Xi’an 710021, China 2. Nanjing Forestry University College of Wood Science and Technology, Nanjing 210037, China
Abstract：The present paper mainly studies the influence of the junction temperature on the white LED spectral characteristics of the mixture of the DCJTB and YAG∶Ce3+ phosphor. With layered coating of YAG phosphor and organic materials DCJTB on the LED chip with the method of hierarchical point powder, the color rendering index of the device will reach up to 90. The junction temperature can be measured conveniently and accurately with the integrated LED cooling pad which was developed by the laboratory. Experiments show that: the rise of the junction temperature can make the radiation amplitude of the blue chip decline continuously. The yellow radiation amplitude of YAG phosphor which is excited by radiation first increases and then decreases, the red spectrum is blue-shifted, the color rendering index of the device decreased linearly, while the color temperature first increases and then decreases.
梁田静1，张方辉1，屈少君2，韩 亮1，邱西振1 . 结温对DCJTB混合YAG∶Ce3+白光LED光谱特性的影响 [J]. 光谱学与光谱分析, 2013, 33(02): 490-493.
LIANG Tian-jing1, ZHANG Fang-hui1, QU Shao-jun2, HAN Liang1, QIU Xi-zhen1 . The Influence of Junction Temperature on the White LED Spectral Characteristics of the Mixture of the DCJTB and YAG∶Ce3+. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2013, 33(02): 490-493.
