学术报告

【2019-49】

报告人：Soo Young Kim(Korea University)

报告题目：Transition metal dichalcogenides for optoelectronic devices  

报告人简介：
       Soo Young kim received the Ph.D. degrees in materials science and engineering from Pohang University of Science and Technology(POSTECH), Pohang, South Korea in 2007. After starting assistant professor in Chung-Ang Univcrsity. Scoul, South Korca. in 2009, hc has been interested in the modulation of the properties of two-dimensional malerials such as graphene. graphene oxide, transition metal dichalcogenides(TMDs ), and their applications. his research is focused on the optimization of two-dimensional materials properties and their application to energy devices, such as OLEDs, organic photovoltaics perovskite solar cells. light emitting diodes. gas sensors. hydrogen evolution reaction, and CO₂ reduction. he has learnd the synthesis of nano particles based on metal sulfides, organic perovskite malerials, and inorganic perovskite materials. Nowadays, he is now trying to apply perovskite nanoparticles and TMD materials to the light emitting diodes and solar cells.

报告内容简介：       

      Recently, transition metal dichalcogenides(TMDs) including MoS2 and WS2 have attracted increasing attention because of their great potential as semiconductors of electronic devices We will introduce three kinds of fabrication methods for TMDs. first, TMD layers with a polycrystalline structure were synthesized by a chemical deposition method using uniformly spin coated (NH4 )MoS4 and (NH4)WS4 precursor solutions. TMDs were used in Organic light milling diodes (OLEDs)and organic photovoltaic cells. It dramatically improved the device performance. Second, the backplane circuitry of a flexible display, comprising an array of transistors responsible for turning the individual OLED pixels ON and OFF, was fabricated using a metal-organic CVD(MOCVD)-grown bilayer MoS2 film on a 6-mm-thick ultrathin polyethylene terephthalate. Last, TMDs were synthesized using a direct synthesis method on a p-type Si wafer via thermolysis. The application of TMDs synthesized by last two methods also will be shown in this talk.
 

报告时间:2019年8月21日(星期三)下午4:30
报告地点:致知楼三层报告厅(2307室)