Professional Interests:

Experimental solid state physics: Chemically deposited thin film photovoltaic solar cells, Thin film lithium batteries for MCM's and Integrated power supplies, Electron Beam Induced Conductivity (EBIC), Scanning Tunneling Optical Spectroscopy (STOS), Electrical and Optical characterization of thin film semiconductors, semiconductor junctions, and devices.

Selected Refereed Publications:

"Evidence for a Crossover from Multiple-Trapping to Percolation in the High-Temperature Electrical Conductivity of Mn-Doped LaCrO₃," R. Raffaelle, H.U. Anderson, D.M. Sparlin, P.E. Parris, Phys. Rev. Letters, 65, 1383 (1990).

"Transport Anomalies in the High-Temperature Hopping Conductivity and Thermopower of Sr-doped La(Cr,Mn)O₃," R. Raffaelle, H.U. Anderson, D.M. Sparlin, and P.E. Parris, Phys. Rev. B, 43, 10, 7991 (1991).

"Scanning Tunneling Microscopy of Electrodeposited Ceramic Superlattices", J.A. Switzer, R.P. Raffaelle, R.P. Phillips, C.J. Hung, and T.D. Golden, Science, 258, 1918 (1992).

"Determination of Modulation Wavelengths in Nanoscale Electrodeposited Superlattices Using the ScanningTunneling Microscope", R.P. Raffaelle, T.D. Golden, R.J. Phillips, and J.A. Switzer, J. Nanoscale Materials, 2, 175 (1993).

"Cross-Sectional Scanning Tunneling Microscopy of Electrodeposited Metal Oxide Superlattices," T.D. Golden, R.P. Raffaelle, and J.A. Switzer, Appl. Phys. Letters, 63, 1501 (1993).

"Effect of Crystal Defects on the Minority Carrier Diffusion Lengths in 6H SiC," S.M. Hubbard, M. Tabib-Azar, S.G. Bailey, G. Rybicki, P. Neudeck, and R.P. Raffaelle, 26^th IEEE PVSC (IEEE, New York, 1997).

"Scanning Tunneling Microscopy of Electrodeposited CuInSe₂ Nanoscale Mulilayers," R.P. Raffaelle, J.G. Mantovani, and R. Friedfeld, Solar Energy Materials and Solar Cells, 46, 201 (1997).

"Electrodeposited CuInSe₂ Thin Film Junctions," R.P. Raffaelle, J.G. Mantovani, S.G. Bailey, A.F. Hepp, E.M. Gordon, and R. Haraway, NASA/TM-97-206322 (1997).

"Electrodeposited CdS on CIS pn Junctions," R. P. Raffaelle, H. forsell, T. Potdevin, J.G. Mantovani, S.G. Bailey, E.M. Gordon, and A.F. Hepp, Solar Energy Materials and Solar Cells, 57 (1998).

"Next-Generation Space PV: Thin Films," R.P. Raffaelle, Space Photovoltaics Research and Technology, 16 (1999).

"Electrodeposition of CuIn_xGa_1-xSe₂ Thin Films," R. Friedfeld, R.P. Raffaelle, and J.G. Mantovani, Solar Energy Materials and Solar Cells 58, 375 (1999).

"Electrochemical Synthesis of CuInSe₂ for Thin Film Devices," R.P. Raffaelle, T. Potdevin, A.F. Hepp, and S.G. Bailey, Materials Science in Semiconductor Processing, 68 (1999).

Support:

"Development of the Next-Generation Thin Film CIS & CIGS Photovoltaic Solar Cell," NASA Grant NCC3-710.