| 학회 |
한국공업화학회 |
| 학술대회 |
2018년 봄 (05/02 ~ 05/04, 대구 엑스코(EXCO)) |
| 권호 |
22권 1호 |
| 발표분야 |
촉매_포스터 |
| 제목 |
Defect-pairs of Titanium and Carbon in Iron Oxide Film for Efficient Visible Light Driven Water Splitting |
| 초록 |
Iron oxide (hematite, Fe2O3) has recently attracted much attention for solar-powered photoelectrochemical (PEC) water oxidation, but it has very short hole diffusion length and low carrier mobility, which causes considerable recombination of photo-generated electrons and holes. We found a much simpler way to improve the electrical properties of Fe2O3 film, namely defect-pairs due to co-doping. Titanium (Ti) and carbon (C) co-doped thin Fe2O3 film (i.e. (Ti,C)-Fe2O3) turns out to lead significantly enhanced PEC performance when used as a photoanode. The origin for such substantial enhancement will be discussed in detail: A series of experimental and computational spectroscopies which indicate that C atoms can be more deeply and heavily doped under the existence of Ti dopants in Fe2O3 film and then the defect-pairs of Ti and C increase not only charge carrier density but also electron’s mobility. |
| 저자 |
최일용1, 김동훈2, 전태화1, 이국승3, 최원용1, 한상수2, 김종규1
|
| 소속 |
1POSTECH, 2KIST, 3PAL |
| 키워드 |
Defect-pairs; Titanium; Carbon; Iron Oxide; Visible Light Driven Water Splitting
|
| E-Mail |
|
