[융합과학부]Nanocrystals: Past, Present and Future

Speaker: 오누리 교수(한양대학교)

Date & Time: 2019년 5월 15일(수), 17:00

Where: 융합대학원 D-122호

Abstract

Quantum and dielectric confinement effects in the nanoscale semiconductors result in the size- and shape-dependent optical/electrical properties that are not available in traditional bulk semiconductors. The semiconductor nanocrystals (also referred to as quantum dots) are commonly made of compound semiconductors including II-VI, III-V, IV-VI and I-III-VI2 semiconductors and can be synthesized by scalable wet-chemical synthetic methods. With the benefits of solution-based fabrication techniques, these colloidal nanocrystals can be processed into arrays or solid films and integrated in electronic/optoelectronic devices to control the charge carriers and convert them into optical flux or vice versa. The main challenge is to control the direction, separation and recombination of electrons and holes while having both carriers physically and electronically accessible. In this talk, I will review the brief history and recent progress of semiconductor nanocrystals, and describe how to synthesize and characterize colloidal nanorod heterostructures that consist of two heterojunctions and maintain the anisotropic shapes. Band offsets designed into the nanorods can facilitate both charge recombination and separation, ultimately allowing one device to function as both high performance LEDs and photodetectors. These dual-functioning, all-solution-processed light-responsive LEDs open feasible routes to novel display applications, from touchless interactive screens to energy harvesting displays and massively parallel display-to-display data communication.

Biography

[학력]

2010.08 – 2016.05 Ph.D, Materials Science & Engineering, University of Illinois at Urbana-Champaign
2007.02 – 2009.02 M.S, Materials Science & Engineering, Hanyang University
2000.03 – 2007.02 B.S, Materials Science & Engineering, Hanyang University

[경력]

2018.03 – Present Assistant Professor, Division of Materials Science & Engineering, Hanyang University
2016.09 – 2018.02 Postdoctoral Researcher, University of Pennsylvania
2016.05 – 2016.08 Postdoctoral Researcher, University of Illinois at Urbana-Champaign
2009.10 – 2010.07 Research Scientist, Korea Institute of Science and Technology

 

초청자: 융합과학부 나노융합전공 송윤규 교수(연락처 : 031-888-9133, songyk@snu.ac.kr)

2019-05-13|