Performance of Hydrogenated a-Si:H Solar Cells with Downshifting Coating: Preprint.
Author: Nemeth, B.; Xu, Y.; Wang, H.; Sun, T.; Lee, B. G.; Duda, A.; Wang, Q.
Pages/Volumes: 7 pp.
Publication Year: 2011
Notes: Presented at the 2011 Materials Research Society Spring Meeting, 25-29 April 2011, San Francisco, California
Document Type: Conference Paper
NTIS/GPO Number: 1018103
Subject Code Description: Solar Energy - Photovoltaics
Abstract: We apply a thin luminescent downshifting (LDS) coating to a hydrogenated amorphous Si (a-Si:H) solar cell and study the mechanism of possible current enhancement. The conversion material used in this study converts wavelengths below 400 nm to a narrow line around 615 nm. This material is coated on the front of the glass of the a-Si:H solar cell with a glass/TCO/p/i/n/Ag superstrate configuration. The initial efficiency of the solar cell without the LDS coating is above 9.0 % with open circuit voltage of 0.84 V. Typically, the spectral response below 400 nm of an a-Si:H solar cell is weaker than that at 615 nm. By converting ultraviolet (UV) light to red light, the solar cell will receive more red photons; therefore, solar cell performance is expected to improve. We observe evidence of downshifting in reflectance spectra. The cell Jsc decreases by 0.13 mA/cm2, and loss mechanisms are identified.
Accession Number: 51824
Library Notes: NPL-1106 REV
Report Numbers: CP-5200-51824
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