荧光粉沉降对发光二极管光色特性的影响
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摘要
针对白光发光二极管(LED)器件封装中存在的荧光粉沉淀现象,对点胶后不同静置时间下白光LED的光学性能和色坐标集中度进行了研究。研究结果表明,当荧光粉静置时间在0~30min时,色坐标落点较为集中,中心坐标位于色容差7SDCM内;30~40min时,落点较为分散,中心坐标超出色容差。模拟了白光LED灯具在热学平衡时的热量分布,结果显示LED灯具的工作温度满足工业生产的需求。
Aiming at the phenomenon of phosphor sedimentation during white light emitting diode(LED)package,the optical properties and the concentration ratios of color coordinates of a white LED after dispensing are studied under different standing time.The study results show that,when the standing time is between 0 and 30 min,the color coordinate setting is concentrated whose center coordinates are in the range of 7 SDCM color tolerance;when the standing time is between 30 min and 40 min,the color coordinate setting is dispersive whose center coordinates are out of the range of color tolerance.The heat distribution of white LED lamps at the heat balance is simulated and the results show that the working temperature of light emitting diode lamps meets the requirements of industrial production.
Aiming at the phenomenon of phosphor sedimentation during white light emitting diode(LED)package,the optical properties and the concentration ratios of color coordinates of a white LED after dispensing are studied under different standing time.The study results show that,when the standing time is between 0 and 30 min,the color coordinate setting is concentrated whose center coordinates are in the range of 7 SDCM color tolerance;when the standing time is between 30 min and 40 min,the color coordinate setting is dispersive whose center coordinates are out of the range of color tolerance.The heat distribution of white LED lamps at the heat balance is simulated and the results show that the working temperature of light emitting diode lamps meets the requirements of industrial production.
引文
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[18]Yang B B,Zou J,Wang F C,et al.Optical and reliability properties of green YAG phosphors by Ga substitution[J].Journal of Materials Science:Materials in Electronics,2016,27(4):3376-3383.
[19]Wang Baohe,Wang Xizhong.New method for calculation of settling velocity of a spheroidal particle[J].Powder Science and Technology,1996,2(2):30-39.王宝和,王喜忠.计算球形颗粒自由沉降速度的一种新方法[J].粉体技术,1996,2(2):30-29.
[20]Jia Longchang.Research on color temperature drift of white light emitting LED caused by phosphor sedimentation and its solution[D].Nanjing:Southeast University,2015.贾龙昌.荧光粉沉降导致的白光LED色温漂移及其解决办法[D].南京:东南大学,2015.
[21]Li Li,Liu Hongbin,Yang Xianping,et al.Study on sedimentation law of cutting grains in solid liquid separator[J].Natural Gas Industry,2005,25(11):62-65.李丽,刘洪斌,杨献平,等.固液分离机中岩屑颗粒沉降规律研究[J].天然气工业,2005,25(11):62-65.
[2]Fang Zhilie.Future applications of light emitting diodes[J].Physics,2003,32(5):295-301.方志烈.发光二极管材料与器件的历史、现状和展望[J].物理,2003,32(5):295-301.
[3]Dupuis R D,Krames M R.History,development,and applications of high-brightness visible light-emitting diodes[J].Journal of Lightwave Technology,2008,26(9):1154-1171.
[4]Shur M S,Zukauskas R.Solid-state lighting:toward superior illumination[J].Proceedings of the IEEE,2005,93(10):1691-1703.
[5]Mueller-Mach R,Mueller G O,Krames M R,et al.High-power phosphor-converted light-emitting diode based on III-nitrides[J].IEEE Journal on Selected Topics in Quantum Electronics,2002,8(2):339-345.
[6]Zhang Shaohua,Zhou Mingbin,Hu Jiangfeng,et al.Research progress in preparation of single phase silicate phosphor for NUV-white light emitting diodes[J].Materials Review,2009,23(5):25-29.章少华,周明斌,胡江峰,等.近紫外光激发的白光LED用单基质硅酸盐荧光粉的研究进展[J].材料导报,2009,23(5):25-29.
[7]Yang Zhiping,Liu Yufeng,Wang Liwei,et al.Luminescence properties of the single white emitting phosphor Eu2+,Mn2+co-doped Ca2SiO3Cl2[J].Acta Physica Sinica,2007,56(1):546-550.杨志平,刘玉峰,王利伟,等.用于白光LED的单一基质白光荧光粉Ca2SiO3Cl2…Eu2+,Mn2+的发光性质[J].物理学报,2007,56(1):546-550.
[8]Song Guohua,Miao Jianwen,Jiang Bin,et al.White LED based on near UV LED chip precoated with tri-color phosphors[J].Semiconductor Technology,2011,36(8):586-590.宋国华,缪建文,姜斌,等.近紫外芯片激发三基色荧光粉制作的白光LED[J].半导体技术,2011,36(8):586-590.
[9]Brinkley S E,Pfaff N,Denault K A,et al.Robust thermal performance of Sr2Si5N8…Eu2+:an efficient red emitting phosphor for light emitting diode based white lighting[J].Applied Physics Letters,2011,99(24):241106.
[10]Yao Qi.Spectral efficiency performance optimization research on three-chips of LED[J].Laser&Optoelectronics Progress,2015,52(8):083003.姚其.三芯片LED光谱效率性能优化研究[J].激光与光电子学进展,2015,52(8):083003.
[11]Mei Jianjian,Liu Lilan.Research on white light color temperature deviation based on tricolor LEDs[J].Acta Optica Sinica,2016,36(8):0833001.梅健健,刘丽兰.基于三基色LED的白光色温偏差研究[J].光学学报,2016,36(8):0833001.
[12]Hu Yibin,Zhuang Qiren,Liu Shiwei,et al.Study on LEDs synthesized high color rendering index white light source[J].Acta Optica Sinica,2016,36(3):0323003.胡奕彬,庄其仁,刘士伟,等.高显色指数LED合成白光光源的研究[J].光学学报,2016,36(3):0323003.
[13]Jang H S,Im W B,Dong C L,et al.Enhancement of red spectral emission intensity of Y3Al5O12…Ce3+phosphor via Pr co-doping and Tb substitution for the application to white LEDs[J].Journal of Luminescence,2007,126(2):371-377.
[14]Liu Zongyuan.Research on key issues of design and manufacturing for high-power light-emitting diode packaging[D].Wuhan:Huazhong University of Science and Technology,2010.刘宗源.大功率LED封装设计与制造的关键问题研究[D].武汉:华中科技大学,2010.
[15]Zukauskas A,Shur M S,Gaska R.Introduction to solid-state lighting[M].New York:John Wiley&Sons,2002.
[16]Hoelen C,van der Burgt P,Jungwirth P,et al.Color-consistent LED modules for general lighting[C].SPIE,2009,7231:72310A.
[17]Feng Han.Influence of phosphor settling on optical consistency of high-power LED[D].Wuhan:Huazhong University of Science and Technology,2011.冯瀚.荧光粉沉降问题对LED光学一致性的影响[D].武汉:华中科技大学,2011.
[18]Yang B B,Zou J,Wang F C,et al.Optical and reliability properties of green YAG phosphors by Ga substitution[J].Journal of Materials Science:Materials in Electronics,2016,27(4):3376-3383.
[19]Wang Baohe,Wang Xizhong.New method for calculation of settling velocity of a spheroidal particle[J].Powder Science and Technology,1996,2(2):30-39.王宝和,王喜忠.计算球形颗粒自由沉降速度的一种新方法[J].粉体技术,1996,2(2):30-29.
[20]Jia Longchang.Research on color temperature drift of white light emitting LED caused by phosphor sedimentation and its solution[D].Nanjing:Southeast University,2015.贾龙昌.荧光粉沉降导致的白光LED色温漂移及其解决办法[D].南京:东南大学,2015.
[21]Li Li,Liu Hongbin,Yang Xianping,et al.Study on sedimentation law of cutting grains in solid liquid separator[J].Natural Gas Industry,2005,25(11):62-65.李丽,刘洪斌,杨献平,等.固液分离机中岩屑颗粒沉降规律研究[J].天然气工业,2005,25(11):62-65.