P-Layer Optimization in High-Performance a-Si:H Solar Cells

Yueqin Xu, Bill Nemeth, Falah Hasoon, Lusheng Hong, Anna Duda, Qi Wang

Research output: Contribution to conferencePaperpeer-review

3 Scopus Citations


We report our progress toward high-performance hydrogenated amorphous silicon (a-Si:H) solar cells fabricated in NREL's newly installed multi-chamber film Si deposition system. The a-Si:H layers are made by standard radio frequency plasma-enhanced chemical vapor deposition. This system produces a-Si:H p-i-n single-junction devices on Asahi U-type transparent conducting oxide glass with >10% initial efficiency. The importance of the p-layer to the cell is identified: it plays a critical role in further improving cell performance. Our optimization process involves changing p-layer parameters such as dopant levels, bandgap, and thickness in cells as well as applying a double p-layer. With the optimized p-layer, we are able to increase the fill factor of our cells to as high as 72% while maintaining high open-circuit voltage.

Original languageAmerican English
Number of pages6
StatePublished - 2010
EventMaterials Research Society Symposium - San Francisco, California
Duration: 5 Apr 20109 Apr 2010


ConferenceMaterials Research Society Symposium
CitySan Francisco, California

NREL Publication Number

  • NREL/CP-520-47960

Other Report Number

  • Paper No. 1245-A07-15


  • high performance hydrogenated amorphous silicon


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