Prof.  Shengjun  Zhou
Wuhan University,  China

Title: Recent advances in 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 full-colour displays because of their high luminous efficiency, low energy consumption, long operation lifetime, and broad spectral range spanning from ultraviolet to red wavelengths. However, the poor internal quantum efficiency and low light extraction efficiency constitute the bottlenecks in realizing high performance devices. 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 advances from our group in developing light-out coupling micro/nano-structures, such as nanometer-scale V-pits, 3D patterned dual-layer ITO, nanoscale patterned sapphire substrate, wavy sidewall, sidewall nano-prisms, embedded air voids, microstructured SiO₂array, and metal wire gird transparent conductive electrode will be discussed. Moreover, the recent development in fabricating flip-chip LED, vertical LEDs, and Mini-LEDs will also be introduced.

 

Biography:

Shengjun Zhou the Ph.D. degree from Shanghai Jiao Tong University, Shanghai, China, in 2011. He is now an Associate 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 Scholarof Hubei province, and Luojia Young Scholar of Wuhan University. He has published more than 50 papers and holds 10 patents. He is Co-chair of the Organizing Committee for IEEE ICEPT 2016 conference. He served as committee member for many conferences.