Time domain simulation of tandem silicon solar cells with optimal textured light trapping enabled by the quadratic complex rational function
- Title
- Time domain simulation of tandem silicon solar cells with optimal textured light trapping enabled by the quadratic complex rational function
- Author
- 정경영
- Issue Date
- 2014-04
- Publisher
- OPTICAL SOC AMER
- Citation
- OPTICS EXPRESS; MAY 5 2014, 22, 9, pA818-pA832
- Abstract
- Amorphous silicon/crystalline silicon (a-Si/c-Si) micromorph tandem cells, with best confirmed efficiency of 12.3%, have yet to fully approach their theoretical performance limits. In this work, we consider a strategy for improving the light trapping and charge collection of a-Si/c-Si micromorph tandem cells using random texturing with adjustable short-range correlations and long-range periodicity. In order to consider the full-spectrum absorption of a-Si and c-Si, a novel dispersion model known as a quadratic complex rational function (QCRF) is applied to photovoltaic materials (e. g., a-Si, c-Si and silver). It has the advantage of accurately modeling experimental semiconductor dielectric values over the entire relevant solar bandwidth from 300-1000 nm in a single simulation. This wide-band dispersion model is then used to model a silicon tandem cell stack (ITO/a-Si:H/c-Si:H/silver), as two parameters are varied: maximum texturing height h and correlation parameter f. Even without any other light trapping methods, our front texturing method demonstrates 12.37% stabilized cell efficiency and 12.79 mA/cm(2) in a 2 mu m-thick active layer. (C) 2014 Optical Society of America
- URI
- https://www.osapublishing.org/oe/abstract.cfm?uri=oe-22-S3-A818http://hdl.handle.net/20.500.11754/51187
- ISSN
- 1094-4087
- DOI
- 10.1364/OE.22.00A818
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > ELECTRONIC ENGINEERING(융합전자공학부) > Articles
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