| 학회 | 한국재료학회 |
| 학술대회 | 2021년 가을 (11/24 ~ 11/26, 경주 라한호텔) |
| 권호 | 27권 2호 |
| 발표분야 | C. 에너지 재료 분과 |
| 제목 | Hydrothermally Grown Antimony Sulfide as an Absorber Layer for Substrate Configured Thin Film Solar Cells |
| 초록 | Antimony sulfide (Sb2S3) have been developed as an attractive non-toxic and earth-abundant solar absorber candidate among the thin-film photovoltaic devices. Sb2S3 has gained significant interest in recent years because of its excellent excellent photovoltaic properties, for example, an appropriate optical band gap (~1.7 eV) and a high optical absorption coefficient in the visible region (≥105 cm-1). As a binary semiconductor compound, Sb2S3 exhibits a single phase by avoiding unwanted secondary phases at a high-temperature process. To date, the highest power conversion efficiency (PCE) of ~6.56% and ~7.50% was obtained for the planer and mesoporous sensitized Sb2S3-based solar cells, respectively. Whereas substrate structured devices achieved less than 1.86% PCE. The low PCE for substrate structured Sb2S3 devices was attributed to the compromised ohmic contact and low current density due to the unfavorable grain growth and orientation of the Sb2S3 absorber layer on the Molybdenum (Mo) substrate. In this work, we used a facile hydrothermal approach to deposit Sb2S3 thin films on molybdenum and investigated the effect of post-deposition annealing on the structure, orientation, and morphology of Sb2S3 thin films. Variation in the annealing temperature from 0 to 350 ℃ resulted in a transformation of nearly amorphous to polycrystalline Sb2S3 thin films with horizontally aligned large plate-like grains. The specific orientation of the films was analyzed from the texture coefficient calculated from the XRD data. All the annealed Sb2S3 thin films were confirmed to have preferred orientation along the (hk0) crystal direction. The solar cell device composed of Mo/Sb2S3/CdS/i-ZnO/AZO/Al structure was fabricated to measure the J-V characteristics. The fabricated device has shown the highest PCE of ~1.0%. |
| 저자 | Pravin S. Pawar1, Raju Nandi2, Jae Yu Cho1, Jaeyeong Heo2 |
| 소속 | 1Department of Material Science and Engineering and Optoelectronics Convergence Research Center, 2Chonnam National Univ. |
| 키워드 | Antimony sulfide; thin-film solar cells; substrate structure; hydrothermal deposition; annealing temperature |
