Journal
JOURNAL OF PHYSICS D-APPLIED PHYSICS
Volume 44, Issue 26, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0022-3727/44/26/262001
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Funding
- NSERC (Natural Sciences and Engineering Research Council of Canada)
- ORF-RE(Ontario Research Foundation-Research Excellence) in collaboration with ARISE Technologies
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Wave optics calculations are performed to determine the energy conversion efficiency of pyramidal textured thin c-Si solar cells. For an optimized 20 mu m thick c-Si device backed by a silver mirror an efficiency of 21.3% is obtained. An alternative approach to back reflection, submicrometre phase-shifted pyramid texturization on the back surface instead of the lossy metal mirror is demonstrated to yield a higher efficiency of 21.5%. More significantly the phase-shifted texturization approach permits light to enter the solar cell from both the front and back surfaces. For 10 mu m and 5 mu m thicknesses, efficiencies of 20.4% and 19.0% are obtained, respectively. Thus, the architecture is amenable to fabrication of high-efficiency ultra-thin bifacial solar cells.
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