[Distinguished Lecture Series]

Nov. 13^th Wed. 2019, 4:30pm
N Center #86120, Sungkyunkwan University, Suwon

Mass production strategy of optoelectronically-active nanomaterials for telecommunications

Prof. Joohoon Kang

(Advanced Materials Science and Engineering, SKKU)

Abstract

The emergence of nanomaterials provides various advantages to alternate the conventional optoelectronic materials platform, such as relatively simple processing, CMOS compatibility, unique properties originated from confined structures, and wide materials selection. For practical high-performance optoelectronic applications, it is required to produce large quantity nanomaterials with high chemical and structural purity. Although solution-processing approaches for isolating large quantities of nanomaterials have emerged as a scalable production approach, they typically lack control over the materials purity, resulting in polydisperse dispersions with heterogeneous properties. To overcome the limitations, firstly, I will introduce three subsequent process developments to avoid chemical degradation of ambient-reactive nanomaterials. And then, I will discuss a post-synthetic process, density gradient ultracentrifugation, to achieve high structural purity. Lastly, scalable photonic applications including NIR lasing at telecommunication wavelengths will be demonstrated based on the as-prepared high-quality, chemically and structurally pure nanomaterials. From the results, future directions and outlook will be further discussed for the next generation of photon-based communication system.

Brief Bio

Joohoon Kang is an Assistant Professor in the School of Advanced Materials Science and Engineering at Sungkyunkwan University. He received his B.S. and M.S. in the Department of Materials Science and Engineering in 2009 and 2011, respectively, from Yonsei University in Korea and his Ph.D. in Materials Science and Engineering from Northwestern University in 2018 under Professor Mark C. Hersam. And then, he moved to the University of California at Berkeley to pursue postdoctoral research under Professor Peidong Yang in the Department of Chemistry. His research interests include nanomaterials synthesis, processing and optoelectronic applications.