| 학회 | 한국공업화학회 |
| 학술대회 | 2018년 가을 (10/31 ~ 11/02, 제주국제컨벤션센터(ICC JEJU)) |
| 권호 | 22권 2호 |
| 발표분야 | 에너지저장.변환_포스터 |
| 제목 | Synthesis of Copper Bismuth Oxide Photocathode and Thin Metal Oxide Passivation |
| 초록 | Copper bismuth oxide is a p-type semiconductor material which has 1.8eV band gap and 19.7mA/cm2 of theoretical photocurrent density. The p-type Conductivity comes from the copper vacancy states near the valence band edge. CBO fulfills several requirements for the photoelectrochemical water splitting photocatalyst, 1) proper band gap (from 1.3eV to 1.8eV) 2) appropriate band alignment for hydrogen reduction. and 3) earth abundant and low cost of fabrication. But CBO has poor charge transfer activity, slow kinetics and photocorrosion caused by trapping of photoelectrons in the Cu 3d band. To overcome disadvantages, 1) optimizing the synthesis method, 2) improve charge transfer activity by using dopant, junction, and so on, and 3) passivation layer for stability are required. In this study, highly transparent and regular copper bismuth oxide film was obtained by drop-casting method. Metal oxide passivation layers were tried to improve charge transfer activity and stability. |
| 저자 | 김지혜, 이재성 |
| 소속 | UNIST |
| 키워드 | 광촉매; 반도체 |
