Thin film poly-Si solar cell with ``STAR structure`` on glass substrate fabricated at low temperature
- Kaneka Corp., Kobe (Japan). Central Research Labs.
The performances of thin film poly-Si solar cells with a thickness of less than 5 {micro}m on a glass substrate have been systematically investigated as a function of thickness. The cell of glass/back reflector/n-i-p poly-Si/ITO is well characterized by the structure of naturally surface texture and enhanced absorption with a back reflector (STAR), where the active i-layer was fabricated by plasma chemical vapor deposition (CVD) at low temperature. The cell with a thickness of 3.5 {micro}M and 2.5 {micro}m demonstrated an intrinsic efficiency of 9.8%, as independently confirmed by Japan Quality Assurance. The optical confinement effect explains the excellent spectral response at long wavelength for the cells through the PC1D analysis. The higher sensitivity at long-wavelength of the cell appeared in quantum efficiency curves is well correlated to the result of reflectance measurement. The open circuit voltage of 0.526 mV and the efficiency of 9.3% has been achieved for the cell with a thickness of 1.5 {micro}m, which was proved to be entirely stable with respect to the light-soaking. The stabilized efficiency of the developed a-Si:H/poly-Si/poly-Si stacked solar cell exhibits the efficiency of 11.5%.
- Sponsoring Organization:
- New Energy and Industrial Technology Development Organization, Tokyo (Japan)
- OSTI ID:
- 304324
- Report Number(s):
- CONF-970953-; TRN: IM9905%%16
- Resource Relation:
- Conference: 26. IEEE photovoltaic specialists conference, Anaheim, CA (United States), 29 Sep - 3 Oct 1997; Other Information: PBD: 1997; Related Information: Is Part Of Conference record of the twenty sixth IEEE photovoltaic specialists conference -- 1997; PB: 1477 p.
- Country of Publication:
- United States
- Language:
- English
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