|
|
| Type |
Poster Presentation |
| Area |
Material Chemistry |
| Room No. |
Exhibition Hall 2+3 |
| Time |
10월 19일 (목요일) 11:00~12:30 |
| Code |
MAT.P-413 |
| Subject |
Two-Dimensional Structure of Germanium Arsenide |
| Authors |
SeungHwan CHA, jeunghee park1,*, eunhee cha2,*
Deapartment Green Energy Engineering, Hoseo University, Korea
1Department of Materials Chemistry, Korea University, Korea
2Department of Pharmaceutics, Hoseo University, Korea
|
| Abstract |
The increasing energy demand and the environmental issues caused by fossil fuels have led to the intense search for clean energy. Hydrogen is considered the ideal sustainable alternative to fossil fuels. Photoelectrochemical(PEC) water splitting for hydrogen generation has been attractive as it can store solar energy in the form of hydrogen. The recent discovery of graphene has given rise to significant interest in searching for new two-dimensional (2D) materials with their three-dimensional prototypes, where the 2D layers are stacked with weak van der Waals interactions. One of remarkable properties of the 2D nanostructures is their unique quantum confinement effect at the 2D limit. In the present work, we synthesized the germanium arsenide nanosheets using the exfoliation of bulk crystals that were synthesized by Bridgeman melt-growth method. Bulk GeAs is found to have a band gap (Eg) of ~1 eV, while the GeAs monolayer has been predicted to have Eg = 2.1 eV. We fabricated the Si/GeAs core/shell nanowire array that acts as a photoelectrode in the solar-driven water-splitting reaction, and observed the higher photocurrent with decreasing the layer thickness. |
| E-mail |
rbbr1023@naver.com |
|
120th General Meeting of the KCS