visual
visual

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나
날짜 2018-05-29 16:00 
일시 May 29 (Tue.), 04:00 PM 
장소 #1323, E6-2 
연사 Prof. Jae-Won Jang 

Physics Seminar Series

 

 

Investigation on metal nanostructure/semiconductor junction and its applications

 

Prof. Jae-Won Jang

Dept. of Physics, Pukyong National University

 

May 29 (Tue.), 04:00 PM

#1323, E6-2

 

Abstract:

Hybrid nanostructures have attracted attention due to many novel properties that are lacking in any one material. Among hybrid nanostructures, semiconductor with metal nanomaterials have been more exploited because metals and semiconductors have different properties that, in combination, result in unique electrical and optical properties. Localized surface plasmon resonance (LSPR), which is one of the novel properties of metal nanoparticles (NPs), has been used as a good strategy for increasing the opto-electric performance in semiconductors. In this presentation, improvement of the opto-electronic properties of non-single crystallized nanowire (NW) devices with space charges generated by LSPR is demonstrated. The photocurrent and spectral response of single polypyrrole (PPy) NW devices are increased by electrostatically attached Ag nanoparticles (NPs). In particular, it is also proved the space charge generation by LSPR of Ag NPs by means of characterizing current–voltage (J–V) dependence and finite-differential time domain (FDTD) simulation on the NW devices. Moreover, semiconductor type dependent role of metal NP in metal NPs decorated semiconductor NW is demonstrated by using light irradiated Kevin probe force microscopy. As an another example of applications based on metal nanostructures and semiconductor junction, it is also demonstrated that a non-traditional metal–semiconductor transition governed by two-layer conduction is possible by tuning the conducting channel of one layer of the two-layer conduction system. By means of the electroless deposition method Au nanofeatures (AuNFs) on p-type silicon (p-Si) is produced as the two-layer conduction system, controlling AuNF coverage (Au%) below and above the percolation threshold (pc). Even when the AuNF coverage percentage is larger than pc, the resistivities of the AuNFs on p-Si show unconventional metal-semiconductor transition as the temperature increases.

 

Department of Physics, KAIST

 

5b07a2c83fc9688fef6c438c.png

 

번호 날짜 장소 제목
공지 2023-02-27 12:00  E6-1 #1501  2023 봄학기 콜로키움 전체 일정
공지 2023-03-16 16:00  E6-2 #1323  2023 봄학기 광학분야 및 응집물리 특별세미나 전체 일정
314 2022-12-20 16:00  E6-2. #2501  Getting into Biology and Medicine as Physicist
313 2019-03-26 15:00  E6-2. 2st fl. #2501  Consideration of thermal Hall effect in frustrated and un-frustrated quantum magnets file
312 2022-06-03 09:30  Online seminar  (Quantum-&Nano-Photonics Webinar) Seeing glass in a new light: reimagine chalcogenide photonics file
311 2018-10-11 16:00  #1323, E6-2  Dirac electrons in a graphene quasicrystal file
310 2019-10-29 14:30  #1323, E6-2  Quantum sensing file
309 2019-05-02 16:00  #1323, E6-2  Anomalous optical properties of halide perovskites file
308 2019-04-11 16:00  #1323, E6-2  Massive screening for cathode active materials using deep neural network file
307 2018-09-20 16:00  #1323, E6-2  Toward Cancer Treatment Using Terahertz Radiation: Demethylation of Cancer DNA file
306 2018-09-20 16:00  #1323, E6-2  Toward Cancer Treatment Using Terahertz Radiation: Demethylation of Cancer DNA file
305 2018-10-18 16:00  #1323, E6-2  Applications of nonlinear optics for condensed matter researches file
304 2018-05-09 16:00  #1323, E6-2  Recent advances in thermoelectric bulk composites file
303 2017-01-09 16:00  Lecture Hall, College of Natural Sciences [#1501,E6-2]  Topological Defects and Phase Transitions" file
302 2016-07-28 16:00  #1323(E6-2. 1st fl.)  Low Dimensional Electrons: On the Road to Hybrid Quantum Systems
301 2019-04-23 16:00  #1323, E6-2  From Mott physics to high-temperature superconductivity file
300 2022-07-21 16:00  CAPP Seminar Room C303, Creation Hall, KAIST Munji Campus  Quintessential axions file
299 2019-11-14 16:00  #1323, E6-2  Semi-classical model of polariton propagation file
298 2017-12-15 09:20  E6-2, Lecture Room #1323  Workshop on Magnetism in Unconventional Superconductors 개최 file
297 2019-11-07 16:00  #1323, E6-2  Integrated quantum photonics with solid-state quantum emitters file
» 2018-05-29 16:00  #1323, E6-2  Investigation on metal nanostructure/semiconductor junction and its applications file
295 2020-10-23 14:00  E6-2 #1323  Plasmon spectroscopy of low-dimensional superconductors in fluctuating regime file