| 학회 | 한국재료학회 |
| 학술대회 | 2020년 가을 (11/18 ~ 11/20, 휘닉스 제주 섭지코지) |
| 권호 | 26권 1호 |
| 발표분야 | C. 에너지 재료 분과 |
| 제목 | Enhanced broadband light absorption in silicon nanowires fabricated by metal-assisted chemical etching for efficient solar vapor generation |
| 초록 | Solar-thermal energy conversion for vapor generation has attracted much attention as a next-generation green and sustainable technology. To enhance solar absorption capability, there have been many efforts to find efficient solar absorption materials, including metallic nanoparticles, metal oxides, carbon-based materials, polymers, semiconductors, and structured materials. Among various canidiates, silicon (Si) would be a promising material for next-generation solar-thermal conversion due to its abundance and low cost. However, Si shows insufficient absorption properties from the visible to near-infrared (NIR) range. Moreover, it barely absorbs photons that have energy below the bandgap (1.1eV), which occupies 19% of the solar spectrum. For these reasons, there were inherent limitations in applying Si as an efficient solar absorber. To overcome the low absorption limit of Si and apply it as a solar vapor generation, in this work, silicon nanowires (Si NWs) were demonstrated as a solar absorber which was fabricated by metal-assisted chemical etching methods. The Si NWs show high efficient absorption properties with 95% and 50% in visible and NIR range. We investigated the solar vapor generation (SVG) performance by using Si NW as a solar absorber and Hanji(Korean tranditional paper) as a water supply channel. From this work, we will discuss the possibility of Si NWs for next-generation SVG materials. |
| 저자 | 주범수, 김진아, 강구민 |
| 소속 | 한국과학기술(연) |
| 키워드 | <P>Silicon nanowire; Metal-assisted chemical etching; Solar vapor generation</P> |
