| Biography | |
|---|---|
 Prof. Shengjun Zhou Wuhan University, China |
|
| Title: Boosting quantum efficiency of III-nitride LEDs | |
| Abstract: III-nitride light-emitting diodes (LEDs) have attracted considerable interest for applications in automotive front lighting, high-resolution full color displays, and visible light communication. However, the internal quantum efficiency of GaN-based LEDs is limited by high threading dislocation density in GaN film due to the lattice mismatch and difference in thermal expansion coefficients between the GaN and the substrate. In addition, the light extraction efficiency of GaN-based LEDs is relatively low due to total internal reflection of light at the GaN-air interface. We will intruduce the recent advances in improving crystalline quality and light extraction efficiency of III-nitride blue/green/ultraviolet LEDs in our group. Recent work, including patterned sapphire substrate, V-pits, patterned current blocking layer, patterned substrate with silica array, sidewalls nano-prism, Ag-based metal reflector, and distributed Bragg reflector (DBR) will be discussed in this talk. Moreover, design and manufacturing technology of mini/micro-LEDs will 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 the National Youth Talent Support Program, IAAM Scientist Medal, IOP Publishing CHINA TOP CITED PAPER AWARD, distinguished Young Scholar of Hubei province, and Chutian Scholar of Hubei province. He has published more than 86 papers and holds over 26 patents. He is Co-chair of the Organizing Committee for IEEE ICEPT 2016 conference. He served as committee member for many conferences. | |
