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Development of optical-thermal coupled model for phosphor-converted LEDs

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Abstract

In this review, first, we discussed the effect of phosphor features on optical properties by the software simulation in detail. A combination of these parameters: phosphor material, phosphor particle size and particle distribution, phosphor layer concentration, phosphor layer thickness, geometry, and location of the phosphor layer, will result in the final optical performance of the phosphor layer. Secondly, we introduced how to improve light extraction efficiency with various proposed methods. Thirdly, we summarized the thermal models to predict the phosphor temperature and the junction temperature. To stabilize the optical performance of phosphor-converted light emitting diodes (PC-LEDs), much effort has been made to reduce the junction temperature of the LED chips. The phosphor temperature, a critical reliability concern for PC-LEDs, should be attracted academic interest. Finally, we summed up optical-thermal coupled model for phosphors and summarized future optical- thermal issues exploring the light quality for LEDs. We foresee that optical-thermal coupled model for PC-LEDs should be paid more attention in the future.

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Acknowledgements

This work was supported by the Science and Technology Planning Project of Zhejiang Province, China (No. 2018C01046), Enterprise-funded Latitudinal Research Projects (Nos. J2016-141, J2017-171, J2017-293 and J2017-243).

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Authors and Affiliations

  1. School of Science, Shanghai Institute of Technology, Shanghai, 201418, China

    Xinglu Qian, Jun Zou, Mingming Shi, Bobo Yang, Zizhuan Liu & Fei Zheng

  2. Zhejiang Emitting Optoelectronic Technology Co, Ltd., Zhejiang, 314100, China

    Jun Zou

  3. School of Material Science and Engineering, Shanghai Institute of Technology, Shanghai, 201418, China

    Yang Li, Ziming Wang & Yiming Liu

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  1. Xinglu Qian
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  2. Jun Zou
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Correspondence to Jun Zou.

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Xinglu Qian received the Bachelor degree from Shanghai Institute of Technology in 2017. And now she is a postgraduate at the Shanghai Institute of Technology. Her major is material chemical engineering. Her current research interests are reliability of LED packaging, mainly involving the research of flexible phosphor film materials and packaging for white LEDs.

Jun Zou is currently a professor at the School of Science, Shanghai Institute of Technology. He received his Bachelor degree in inorganic non-metallic materials from Changchun University of Science and Technology in 2002. He obtained his Ph.D. degree in materials science from Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences in 2007. His research interests include semiconductor materials and devices.

Mingming Shi received his Master’s degree in materials chemical engineering from Shanghai Institute of Technology in 2016. Now, he is a research assistant at the School of Science, Shanghai Institute of Technology. His current research interests include LED package and simulation.

Bobo Yang received his Master’s degree in materials chemical engineering from Shanghai Institute of Technology in 2015. Now, he is a research assistant at the School of Science, Shanghai Institute of Technology. His current research interests include phosphor and the application in light emitting diodes.

Yang Li obtained her Ph.D. degree in materials science from Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences in 2018. Now, she is a research assistant at the School of Material Science and Engineering, Shanghai Institute of Technology. Her current research concerns optical glasses and phosphor materials.

Ziming Wang is a postgraduate at the Shanghai Institute of Technology. His major is chemical engineering. His current research interest includes LED packaging.

Yiming Liu is a postgraduate at the Shanghai Institute of Technology. Her major is material chemical engineering. Her current research interests are optoelectronic materials and devices, mainly involving the research of flexible phosphor film materials and devices for white LEDs.

Zizhuan Liu is a postgraduate at the Shanghai Institute of Technology. Her major is material chemical engineering. Her current research interests include spectral coupling law and chromaticity coordinates drift mechanism of LED devices.

Fei Zheng is a postgraduate at the Shanghai Institute of Technology. His major is material chemical engineering. His current research interests include semiconductor materials and devices.

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Qian, X., Zou, J., Shi, M. et al. Development of optical-thermal coupled model for phosphor-converted LEDs. Front. Optoelectron. 12, 249–267 (2019). https://doi.org/10.1007/s12200-018-0857-2

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