Growth and Characterization of GaPNAs on Si

John Geisz, J. M. Olson, W. E. McMahon, T. Hannappel, K. Jones, H. Moutinho, M. M. Al-Jassim

Research output: Contribution to conferencePaperpeer-review

7 Scopus Citations

Abstract

The dilute nitrogen alloy GaPNAs can be lattice matched to silicon with band gaps ranging from 2.3 eV to less than 1.7eV making it of special interest for photovoltaic applications. We have studied the growth and structural quality of the alloy grown on vicinal Si(001) and GaP(001) substrates by MOCVD. Using a particular nucleation scheme, we have deposited 1-μm thick layers that are crack-free and exhibit narrow x-ray line widths. The FWHM of the (004) x-ray reflection from a GaP1-xNx epilayer decreases dramatically from ∼300 arcsec for x=0 to 18 arcsec for x = 0.021, The band gap of this alloy is 1.96 eV. With the addition of As (and more N), the x-ray line widths tend to increase slightly to 27 arcsec.

Original languageAmerican English
Pages27-31
Number of pages5
DOIs
StatePublished - 2003
EventProgress in Compound Semiconductor Materials III - Electronic and Opoelectronic Applications - Boston, MA, United States
Duration: 1 Dec 20034 Dec 2003

Conference

ConferenceProgress in Compound Semiconductor Materials III - Electronic and Opoelectronic Applications
Country/TerritoryUnited States
CityBoston, MA
Period1/12/034/12/03

NREL Publication Number

  • NREL/CP-520-37303

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