| Biography | |
|---|---|
 Prof. Shengjun Zhou Wuhan University, China |
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| Title: Highly efficient nitride-based blue/green/ultraviolet light-emitting diodes | |
| Abstract: Nitride-based light-emitting diodes (LEDs) have attracted considerable interest for their applications in solid state lighting, automotive front lighting, and high-resolution micro-display due to their inherent advantages such as long lifetime, high luminous efficiency, low power consumption, and compact volume. Owing to the large different in refractive indices between GaN and surrounding air, the light extraction efficiency of GaN-based LEDs is low caused by the total internal reflection (TIR) of the emanated light at the GaN/air interface. This talk will outline the emerging challenges in the design and fabrication of micro/nano-structures for improving light extraction efficiency of GaN-based blue/green/ultraviolet LEDs. Recent development from our group in developing high-efficiency light-outcoupling micro/nano-structures, such as patterned dual-layer ITO, patterned SiO2 current blocking layer, nanoscale patterned sapphire substrate, sidewall nano-prism, embedded air cavity array, microstructured SiO2 lens, and metal wire gird transparent conductive electrode will be discussed. Moreover, the recent development in fabricating Mini-LEDs for high-resolution micro-display will also be introduced. | |
| 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 distinguished Young Scholar of Hubei province, Chutian Scholar of Hubei province, and Luojia Young Scholar of Wuhan University. He has published more than 50 papers and holds 10 patents. | |
