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
202 2012-04-02 16:00  E6, 1501  A new route to ferroelectricity in magnetic spinels: a case of Co2MnO4
201 2012-02-13 16:00  E6, 1501  Physics Colloquium : 2012 Spring
200 2011-09-03 16:00  E6, 1501  Physics Colloquium : 2011 Fall file
199 2011-05-16 16:00  E6, 1501  Photonics with surface plasmon polaritons
198 2010-02-14 16:00  E6, 1501  Physics Colloquium - 2011 Spring file
197 2010-09-06 16:00  E6, 1501  Physics Colloquium : 2010 Fall file
196 2010-02-08 16:00  E6, 1501  Physics Ciolloquium : 2010 Spring file
195 2009-10-21 16:00  E6, 1501  Interdimensional Universality of Dynamic Interfaces
194 2009-09-07 16:00  E6, 1501  Physics Colloquium : 2009 Fall file
193 2009-02-23 16:00  E6, 1501  Physics Colloquium : 2009 Spring file
192 2024-03-28 11:00  E6, #2501  Geometric characterization of thermoelectric performance of two-dimensional quadratic band-crossing semimetals
191 2022-03-28 16:00  E6, #1501  Ultimate-density atomic semiconductor via flat bands
190 2022-03-21 16:00  E6, #1501  Multi-wavelength Studies on Relativistic Jets from Gamma-ray Bright Active Galactic Nuclei
189 2022-04-25 16:00  E6, #1501  Ultrafast electron beam, a tool to explore the nanoscopic world of materials(우리말강의)
188 2022-03-07 16:00  E6, #1501  Climate Physics and Modelling(우리말강의)
187 2022-03-14 16:00  E6, #1501  Quantitative phase imaging and artificial intelligence: label-free 3D imaging, classification, and inference
186 2022-02-28 16:00  E6, #1501  Spin-based training of optical microscopes
185 2022-05-02 16:00  E6, #1501  What can we learn from the history of science and technology?(우리말강의)
184 2022-04-11 16:00  E6, #1501  Emergence of Statistical Mechanics in Quantum Systems
183 2022-05-23 16:00  E6, #1501  Novel electronic transport in topological van der Waals magnets