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

Research output: Contribution to conferencePaperpeer-review


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 languageAmerican English
Number of pages5
StatePublished - 2012
Event2011 MRS Spring Meeting - San Francisco, CA, United States
Duration: 25 Apr 201129 Apr 2011


Conference2011 MRS Spring Meeting
Country/TerritoryUnited States
CitySan Francisco, CA

Bibliographical note

See NREL/CP-5200-51824 for preprint

NREL Publication Number

  • NREL/CP-5200-53941

Other Report Number

  • Paper No. 1321-A16-05


  • hydrogenated amorphous silicon
  • performance


Dive into the research topics of 'Performance of Hydrogenated a-Si:H Solar Cells with Downshifting Coating'. Together they form a unique fingerprint.

Cite this