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
173 2022-05-20 11:00  E6-1 #1323  (응집물리 세미나) Exploration of new polymorphs in van der Waals crystals
172 2023-05-17 14:00  E6 #1323  Optical Response in the multilayer thin films
171 2019-05-01 16:00  #1323, E6-2  Raman and x-ray scattering study on correlated electron systems: two case examples file
170 2016-05-11 16:00  E6-2. #1323(1st fl.)  The quest for novel high-temperature superconductors---Prospects and progress in iridates
169 2016-05-13 16:00  E6. #1501(1st fl.)  Graphene analogue in (111)- BaBiO3 bilayer heterostructures for topological electronics
168 2016-05-13 13:30  E6. #1501(1st fl.)  Aperiodic crystals in low dimensions
167 2023-05-15 16:00  CAPP Seminar Room C303, Creation Hall, KAIST Munji Campus  Role of dark Higgs boson in DM physics and cosmology file
166 2016-05-16 16:00  #1323(E6-2, 1st Fl.)  Tuning microwave cavities with biased nonlinear dielectrics for axion searches
165 2023-05-17 16:30  Zoom  Detecting Hidden Photon Dark Matter via the Excitation of Qubits file
164 2016-05-19 16:00  #1323(E6-2, 1st fl.)  Nonlinear/quantum optical effect in silicon nano-photonics
163 2016-05-19 15:00  May 19, 2016 (Thur.) 3PM,  The CERN Resonant WISP Search: Development, Results and Lesson-Learned
162 2019-05-02 16:00  #1323, E6-2  Anomalous optical properties of halide perovskites file
161 2019-05-21 16:00  #5318, E6-2  Classification of flat bands according to the band-crossing singularity of Bloch wave functions file
160 2023-05-22 13:00  E6-6 119  Design & Development of Electrochemical Biosensors for the Detection of T2DM Biomarkers
159 2019-05-24 16:00  #1323, E6-2  Infrared spectroscopy study on metal-insulator transitions in layered perovskite iridates file
158 2016-05-24 16:00  E6-2. #1323(1st fl.)  Electronic and magnetic properties of 2D transition-metal thiophosphates and tunability of magnetic order with carrier density
157 2022-05-27 11:00  Online seminar  Current Status and Future Plans of ADMX file
» 2018-05-29 16:00  #1323, E6-2  Investigation on metal nanostructure/semiconductor junction and its applications file
155 2023-05-03 16:00  E6-2, #2502  Probing microscopic origins of axions by the chiral magnetic effect
154 2019-05-30 16:00  #1323, E6-2  Tuning the excitonic properties of semiconductors with light-matter interactions file