Abstract
The effects of textured back reflectors on light trapping in a-Si:H/μc-Si:H tandem cells are investigated with textured ZnO:Ga (GZO) back contacts obtained by surface wet etching. It is observed that rough back reflectors in fabricated tandem solar cells increase the short circuit current density of the bottom cells by 8%, which is attributed to light-trapping improvement. It is shown that enhanced longer wavelength light trapping is mainly attributable to improved light scattering at the back side by comparing identical a-Si:H/μc-Si:H tandem solar cells, both with a GZO back reflector but only one with a textured back reflector. The effectiveness of the textured GZO back reflector is also demonstrated in a textured a-Si:H/μc-Si:H tandem cell with a bottom cell thickness of 2 μm, which showed higher conversion efficiency than the reference cell.
| Original language | English |
|---|---|
| Pages (from-to) | 3946-3949 |
| Number of pages | 4 |
| Journal | Thin Solid Films |
| Volume | 519 |
| Issue number | 11 |
| DOIs | |
| Publication status | Published - 2011 Mar 31 |
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All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Materials Chemistry
- Metals and Alloys
- Surfaces, Coatings and Films
- Surfaces and Interfaces
Cite this
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Texturing of the back reflector for light trapping enhancement in micromorph thin film solar cells. / Lai, Kuang Chieh; Tsai, Fu Ji; Wang, Jen Hung; Yeh, Chih Hung; Houng, Mau-phon.
In: Thin Solid Films, Vol. 519, No. 11, 31.03.2011, p. 3946-3949.Research output: Contribution to journal › Article
TY - JOUR
T1 - Texturing of the back reflector for light trapping enhancement in micromorph thin film solar cells
AU - Lai, Kuang Chieh
AU - Tsai, Fu Ji
AU - Wang, Jen Hung
AU - Yeh, Chih Hung
AU - Houng, Mau-phon
PY - 2011/3/31
Y1 - 2011/3/31
N2 - The effects of textured back reflectors on light trapping in a-Si:H/μc-Si:H tandem cells are investigated with textured ZnO:Ga (GZO) back contacts obtained by surface wet etching. It is observed that rough back reflectors in fabricated tandem solar cells increase the short circuit current density of the bottom cells by 8%, which is attributed to light-trapping improvement. It is shown that enhanced longer wavelength light trapping is mainly attributable to improved light scattering at the back side by comparing identical a-Si:H/μc-Si:H tandem solar cells, both with a GZO back reflector but only one with a textured back reflector. The effectiveness of the textured GZO back reflector is also demonstrated in a textured a-Si:H/μc-Si:H tandem cell with a bottom cell thickness of 2 μm, which showed higher conversion efficiency than the reference cell.
AB - The effects of textured back reflectors on light trapping in a-Si:H/μc-Si:H tandem cells are investigated with textured ZnO:Ga (GZO) back contacts obtained by surface wet etching. It is observed that rough back reflectors in fabricated tandem solar cells increase the short circuit current density of the bottom cells by 8%, which is attributed to light-trapping improvement. It is shown that enhanced longer wavelength light trapping is mainly attributable to improved light scattering at the back side by comparing identical a-Si:H/μc-Si:H tandem solar cells, both with a GZO back reflector but only one with a textured back reflector. The effectiveness of the textured GZO back reflector is also demonstrated in a textured a-Si:H/μc-Si:H tandem cell with a bottom cell thickness of 2 μm, which showed higher conversion efficiency than the reference cell.
UR - http://www.scopus.com/inward/record.url?scp=79952734942&partnerID=8YFLogxK
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U2 - 10.1016/j.tsf.2011.01.360
DO - 10.1016/j.tsf.2011.01.360
M3 - Article
AN - SCOPUS:79952734942
VL - 519
SP - 3946
EP - 3949
JO - Thin Solid Films
JF - Thin Solid Films
SN - 0040-6090
IS - 11
ER -