Characteristics of 1977 licensed drivers and their travel: report 1, 1977, NPTS. Final report.

Mode of access: Internet.

Sequential purification and crystal growth for the production of low cost silicon substrates : quarterly technical progress report no. 1, September 15-December 31, 1979 /

"February 1980."

Photovoltaic mechanisms in polycrystalline thin film silicon solar cells : quarterly technical progress report no. 1, July 30-October 31, 1980 /

"Work Performed Under Contract No. AC02-77CH00178."

Sequential purification and crystal growth for the production of low cost silicon substrates : quarterly technical progress report no. 3, April 1-June 30, 1980 /

"August 1980."

Photovoltaic research branch semiannual report : period covered : 1 October 1979 to 31 March 1980 /

This report covers SERI research activities on solid-state theory, high-efficiency cells, thin-film cells, silicon purification, silicon crystallization, thick-film technology, surface and interface analysis, and growth of GaAs and related compounds by metal-organic chemical vapor desposition.

Photoelectronic properties of zinc phosphide crystals, films and heterojunctions : quarterly progress report no. 6 for the period July 1 - September 30, 1980 /

The purpose of this research program is to investigate the photoelectronic properties of zinc phosphide (Zn₃P₂ in single crystal form, in thin-film form, and in heterojunctions in which Zn₃P₂ forms one of the elements. This research will be directed toward understanding the role of crystalline defects and impurities in Zn₃P₂, the nature of the electronic charge transport in single crystal and thin-film material, and the properties of photovoltaic heterojunctions involving Zn₃P₂. The scope of the program extends from basic investigations of materials properties on single crystals to the preparation and characterization of all-thin-film heterojunction divices. One of the principal motivations behind this research program is the realization that Zn₃P₂ is a relatively uninvestigated yet ideal component for photovoltaic heterojunction use in solar energy conversion. The proposed program will concentrate on the basic materials problems involved with Zn₃P₂, providing the kind of information needed for other more developmental programs directed toward actual practical cells.

Advanced photovoltaic concentrator cells : quarterly technical progress report no. 5 for period September 1 - November 30, 1980 /

"Work Performed Under Contract No. AC02-77CH00178."

Materials for high efficiency monolithic multigap concentrator solar cells : SERI quarterly report no. 4, January 1 - March 31, 1980.

"Work Performed Under Contract No. AC02-77CH00178."

Commercialization of a thick film solar cell : quarterly technical progress report for April 1 - June 30, 1980 /

"Work Performed Under Contract No. AC02-77CH00178."

Commercialization of a thick film solar cell : quarterly technical progress report for period September 1 - October 1, 1980 /

"Work Performed Under Contract No. AC02-77CH00178."

Low-cost process for P-N junction-type solar cell : quarterly report 4 for May 30 - September 1, 1980 /

"Work Performed Under Contract No. AC02-77CH00178."

Low-cost substrates for polycrystalline-silicon solar cells by electrodeposition processes : thord quarterly progress report for April 1 - June 30, 1980 /

"Work Performed Under Contract No. AC02-77CH00178."

Amorphous thin films for solar-cell applications : quarterly report no. 1 for September 11- December 10, 1979 /

"Work Performed Under Contract No. AC02-77CH00178."

Thin-film polycrystalline silcon solar cells : quarterly technical progress report no. 3 for period April 1 - June 30, 1980 /

"Work Performed Under Contract No. AC02-77CH00178."

Vacuum deposited polycrystalline silicon films for solar cell applications : quarterly report for April 1 - June 30, 1980 /

"Work Performed Under Contract No. AC02-77CH00178."