Performance of Hydrogenated a-Si:H Solar Cells with Downshifting Coating

Bill Nemeth; Yueqin Xu; Haorong Wang; Ted Sun; Benjamin G. Lee; Anna Duda; Qi Wang

doi:10.1557/opl.2011.944

Performance of Hydrogenated a-Si:H Solar Cells with Downshifting Coating

Bill Nemeth, Yueqin Xu, Haorong Wang, Ted Sun, Benjamin G. Lee, Anna Duda, Qi Wang

Chemistry and Nanoscience

Research output: Contribution to conference › Paper › peer-review

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 J _sc decreases by 0.13 mA/cm ², and loss mechanisms are identified.

Original language	American English
Pages	105-109
Number of pages	5
DOIs	https://doi.org/10.1557/opl.2011.944 https://doi.org/10.1557/opl.2011.944
State	Published - 2012
Event	2011 MRS Spring Meeting - San Francisco, CA, United States Duration: 25 Apr 2011 → 29 Apr 2011

Conference

Conference	2011 MRS Spring Meeting
Country/Territory	United States
City	San Francisco, CA
Period	25/04/11 → 29/04/11

Bibliographical note

See NREL/CP-5200-51824 for preprint

NREL Publication Number

NREL/CP-5200-53941

Other Report Number

Paper No. 1321-A16-05

Keywords

hydrogenated amorphous silicon
performance

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title = "Performance of Hydrogenated a-Si:H Solar Cells with Downshifting Coating",

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 J sc decreases by 0.13 mA/cm 2, and loss mechanisms are identified.",

keywords = "hydrogenated amorphous silicon, performance",

author = "Bill Nemeth and Yueqin Xu and Haorong Wang and Ted Sun and Lee, {Benjamin G.} and Anna Duda and Qi Wang",

note = "See NREL/CP-5200-51824 for preprint; 2011 MRS Spring Meeting ; Conference date: 25-04-2011 Through 29-04-2011",

year = "2012",

doi = "10.1557/opl.2011.944",

language = "American English",

pages = "105--109",

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AU - Nemeth, Bill

AU - Xu, Yueqin

AU - Wang, Haorong

AU - Sun, Ted

AU - Lee, Benjamin G.

AU - Duda, Anna

AU - Wang, Qi

N1 - See NREL/CP-5200-51824 for preprint

PY - 2012

Y1 - 2012

N2 - 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 J sc decreases by 0.13 mA/cm 2, and loss mechanisms are identified.

AB - 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 J sc decreases by 0.13 mA/cm 2, and loss mechanisms are identified.

KW - hydrogenated amorphous silicon

KW - performance

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U2 - 10.1557/opl.2011.944

DO - 10.1557/opl.2011.944

M3 - Paper

AN - SCOPUS:84455211109

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EP - 109

T2 - 2011 MRS Spring Meeting

Y2 - 25 April 2011 through 29 April 2011

ER -

Performance of Hydrogenated a-Si:H Solar Cells with Downshifting Coating

Abstract

Conference

Bibliographical note

NREL Publication Number

Other Report Number

Keywords

Access to Document

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Cite this