P/i interfacial engineering in semi-transparent silicon thin film solar cells for fabrication at a low temperature of 150 °C
- Authors
- Choi, Soo-Won; Yang, Johwa; Park, Jae-Ho; Han, Se-Jin; Song, Pungkeun; Kang, Dong-Won; Kwon, Jung-Dae
- Issue Date
- Oct-2019
- Publisher
- Elsevier B.V.
- Keywords
- Building-integrated photovoltaics; Hydrogenated amorphous silicon; Low temperature; Semitransparent; Solar cells; Thin film
- Citation
- Current Applied Physics, v.19, no.10, pp 1120 - 1126
- Pages
- 7
- Journal Title
- Current Applied Physics
- Volume
- 19
- Number
- 10
- Start Page
- 1120
- End Page
- 1126
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/34082
- DOI
- 10.1016/j.cap.2019.07.006
- ISSN
- 1567-1739
1878-1675
- Abstract
- In this study, we aimed to develop semitransparent solar cells (STSCs) using hydrogenated amorphous silicon (a-Si:H) at a low temperature of 150 °C to support the fabrication of flexible solar modules, applicable in building-integrated photovoltaics (BIPV). To compensate for the presumable loss of device performance at such a low processing temperature, careful control of the p/i interface is proposed. We fabricated buffer layers with hydrogen (H2)/silane (SiH4) gas flow ratios (R) ranging from 4 to 16 (R4–R16) to investigate their characteristics and incorporate them at the p/i interface by considering energy band matching. By employing this buffer, the power conversion efficiency (PCE) of a STSC was improved from 4.83% to 5.57% which is the best record in a-Si:H STSCs processed at a low temperature of 150 °C. This p/i interfacial buffer can support the realization of flexible a-Si:H-based BIPV systems using plastic- or polymer-based substrates. © 2019 Korean Physical Society
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