Dong Zhijiang: Research progress and development trend of LED power chip lighting improvement for lighting
The conference attracted a total of 150 visitors. Most of the audience at the conference were senior executives and members of government agencies of LED enterprises in Wuhan. At the meeting, Diyuan Optoelectronics Dong Zhijiang, Jiangsu Xinli Optoelectronics Chen Xu, Ke Rui China Li Wei, Gao Gong LED Xie Suyun and other outstanding speeches. Chen Huafen, director of the Economic Development Bureau of Wuhan East Lake Development Zone, delivered a speech on behalf of the government.
Diyuan Optoelectronics Dong Zhijiang: Research Progress and Development Trend of Light Efficiency Improvement of LED Power Chips for Lighting
Dong Zhijiang pointed out that the current application fields of LED high-power chips for lighting are mainly in the fields of indication, display, backlight and illumination. The requirements for chips in each field are different, such as size, light efficiency, reliability, etc. Especially in the application of LED lighting, the harsh environment of LED lighting puts higher demands on the heat dissipation and temperature shock of the device.
Dong Zhijiang believes that the development of the LED lighting industry depends on three points: higher luminous efficiency, lower cost and better thermal management technology and reliability. For every 1% increase in luminous efficiency, you can save $2 billion annually. To improve LED light efficiency, Dong Zhijiang proposed to improve LED light efficiency by improving internal quantum efficiency and light extraction efficiency (EQE). Among them, methods for improving internal quantum efficiency include: patterned substrate (PSS) technology, pGaN coarsening, hydride vapor phase epitaxy (HVPE), quantum dots, quantum wire MQW growth technology, roughened semi-polar, and non-polar epitaxy. Distributed Bragg Reflection (DBR) and Side Corrosion (LBR) techniques can be used to increase light extraction efficiency.
At the meeting, Dong Zhijiang outlined the research results of industrialization of 100lm/W high-power chips. The 100lm/W high-power chip is applied to indoor lighting fixtures. Through 1000-hour high-temperature accelerated aging (450mA) test, chip normal temperature life test and related data comparison, he believes that LED epitaxy and chip are the core technologies to solve luminous efficiency and thermal management.
Finally, Dong Zhijiang also briefly introduced Diyuan Optoelectronics Semiconductor Lighting Industrial Park. Diyuan Optoelectronics is positioned in LED lighting high-power epitaxy, chip research and development and production. Wuhan Diyuan Optoelectronics Technology Co., Ltd. produces power LED chips with higher lm /$, cost-effective.
Dong Zhijiang, General Manager of Wuhan Diyuan Optoelectronics Technology Co., Ltd.
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