Potential of chemical rounding for the performance enhancement of pyramid textured p-type emitters and bifacial n-PERT Si cells
- Authors
- Song, Inseol; Lee, Hyunju; Lee, Sang-Won; Bae, Soohyun; Hyun, Ji Yeon; Kang, Yoonmook; Lee, Hae-Seok; Ohshita, Yoshio; Ogura, Atsushi; Kim, Donghwan
- Issue Date
- 11월-2018
- Publisher
- ELSEVIER SCIENCE BV
- Keywords
- Chemical rounding; Pyramid texturing; p(+)-emitter; Solar-weighted reflectance; AlOx passivation; Bifacial n-PERT solar cell
- Citation
- CURRENT APPLIED PHYSICS, v.18, no.11, pp.1268 - 1274
- Indexed
- SCIE
SCOPUS
KCI
- Journal Title
- CURRENT APPLIED PHYSICS
- Volume
- 18
- Number
- 11
- Start Page
- 1268
- End Page
- 1274
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/72041
- DOI
- 10.1016/j.cap.2018.07.004
- ISSN
- 1567-1739
- Abstract
- We have investigated the effects of chemical rounding (CR) on the surface passivation and/or antireflection performance of AlOx- and AlOx/SiNx:H stack-passivated pyramid textured p(+) -emitters with two different boron doping concentrations, and on the performance of bifacial n-PERT Si solar cells with a front pyramid textured p(+)-emitter. From experimental results, we found that chemical rounding markedly enhances the passivation performance of AlOx layers on pyramid textured p(+)-emitters, and the level of performance enhancement strongly depends on boron doping concentration. Meanwhile, chemical rounding increases solar-weighted reflectance (R-SW) from similar to 2.5 to similar to 3.7% for the AlOx/SiNx:H stack-passivated pyramid textured p(+)-emitters after 200-sec chemical rounding. Consequently, compared to non-rounded bifacial n-PERT Si cells, the short circuit current density Jsc of 200-sec-rounded bifacial n-PERT Si cells with similar to 60 and similar to 100 Omega/sq p(+) -emitters is reduced by 0.8 and 0.6 mA/cm(2), respectively under front p(+)-emitter side illumination. However, the loss in the short circuit current density JSC is fully offset by the increased fill factor FF by 0.8 and 1.5% for the 200-sec-rounded cells with similar to 60 and similar to 100 Omega/sq p(+)-emitters, respectively. In particular, the cell efficiency of the 200-sec-rounded cells with a similar to 100 Omega/sq p(+)-emitter is enhanced as a result, compared to that of the non-rounded cells. Based on our results, it could be expected that the cell efficiency of bifacial n-PERT Si cells would be improved without additional complicated and costly processes if chemical rounding and boron doping processes can be properly optimized.
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Collections - Graduate School of Energy and Environment (KU-KIST GREEN SCHOOL) > Department of Energy and Environment > 1. Journal Articles
- College of Engineering > Department of Materials Science and Engineering > 1. Journal Articles
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