Optical Absorption in Co-Deposited Mixed-Phase Hydrogenated Amorphous/Nanocrystalline Silicon Thin Films

L. R. Wienkes, A. Besaws, C. Anderson, D. C. Bobela, P. Stradins, U. Kortshagen, J. Kakalios

Research output: Contribution to conferencePaperpeer-review

3 Scopus Citations


The conductivity of amorphous/nanocrystalline hydrogenated silicon thin films (a/nc-Si:H) deposited in a dual chamber co-deposition system exhibits a non-monotonic dependence on the nanocrystal concentration. Optical absorption measurements derived from the constant photocurrent method (CPM) for similarly prepared materials are reported. The optical absorption spectra, in particular the subgap absorption, are found to be independent of nanocrystalline density for relatively small crystal fractions (< 4%). For films with a higher crystalline content, the absorption spectra indicate broader Urbach slopes and higher midgap absorption. These data are interpreted in terms of a model involving electron donation from the nanocrystals into the amorphous material.

Original languageAmerican English
Number of pages6
StatePublished - 2010
Event2010 Materials Research Society Symposium - San Francisco, California
Duration: 5 Apr 20109 Apr 2010


Conference2010 Materials Research Society Symposium
CitySan Francisco, California

NREL Publication Number

  • NREL/CP-5200-50527

Other Report Number

  • Paper No. 1245-A09-03


  • cell efficiency
  • device performance
  • solar cells


Dive into the research topics of 'Optical Absorption in Co-Deposited Mixed-Phase Hydrogenated Amorphous/Nanocrystalline Silicon Thin Films'. Together they form a unique fingerprint.

Cite this