| Biography | |
|---|---|
 Prof. Shengjun Zhou Wuhan University, China |
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| Title: Boosting quantum efficiency of GaN-based visible and ultraviolet light-emitting diodes | |
| Abstract: GaN-based light-emitting diodes (LEDs) have attracted considerable interest for their applications in high-definition displays, automotive front lighting, visible light communication and solid state lighting because of their high luminous efficiency, low energy consumption, long operation lifetime, and broad spectral range spanning from ultraviolet to red wavelengths. The light extraction efficiency of GaN-based blue/green/ultraviolet LEDs is relatively low due to total internal reflection of the generated light at the nitride-air interface resulting from their very different refractive indices. In addition, the further improvement in internal quantum efficiency of GaN-based blue/green/ultraviolet LEDs is limited by high threading dislocation density in the as-grown nitride semiconductors. This talk will outline the emerging challenges in light extraction micro-nano structure designs and the MOCVD growth process for high-efficiency blue/green/ultraviolet LEDs. Moreover, the recent development in flip-chip LED, vertical LEDs, and Mini/Micro-LEDs will be discussed. | |
| Biography: Shengjun Zhou received the Ph.D. degree from Shanghai Jiao Tong University, Shanghai, China, in 2011. He is now a Professor at Wuhan University. His current research interests lie in the areas of GaN-based blue/green/ultraviolet LEDs, nitride semiconductors, nanoimprint lithography and direct laser writing with applications in electronic and photonic devices. He is well known as an industrial technologist. Prior to joining Wuhan University, he was a CTO at Quantum Wafer Inc. from 2011 to 2014, focusing on the development of high-brightness GaN-based high-power LEDs. He was a research fellow at University of Michigan, Ann Arbor, from 2014 to 2015. He received many academic awards including IOP Publishing CHINA TOP CITED PAPER AWARD, distinguished Young Scholar of Hubei province, Chutian Scholar of Hubei province, and Luojia Young Scholar of Wuhan University. He has published more than 70 papers and holds 20 patents. He is Co-chair of the Organizing Committee for IEEE ICEPT 2016 conference. He served as committee member for many conferences. | |
