Development of high-efficiency solar cells on silicon web. First quarterly progress report, April 20-July 15, 1984

Technical Report · Thu Aug 09 04:00:00 EDT 1984

DOI:https://doi.org/10.2172/6509562· OSTI ID:6509562

Rohatgi, A.; Meier, D. L.; Campbell, R. B.; Rai-Choudhury, P.

The major objective of the work reported is to improve web base material with a goal toward obtaining solar cell efficiencies in excess of 18% (AM1). The program consists of the investigation of carrier loss mechanisms in web silicon, development of techniques to reduce carrier recombination in web, and web cell fabrication using effective surface passivation. Web surfaces have been bevelled with the intention of measuring the electrical activity of the twin plane. Web crystals have been intentionally contaminated with vanadium and titanium to examine the twin-plane-assisted internal gettering by DLTS. Model calculations were done to see the effect of twin-plane activity on V/sub oc/ as a function of resistivity of the web material. Experiments were initiated to study the effect of heat treatment and gettering on the minority carrier diffusion length in webs. Fabrication of high-efficiency web cells using several web crystals was initiated. These cells will include surface passivation and double-layer antireflection coating. (LEW)

• Research Organization: Westinghouse Research and Development Center, Pittsburgh, PA (USA)
• DOE Contract Number: NAS-7-100-956786
• OSTI ID: 6509562
• Report Number(s): DOE/JPL/956786-84/1; ON: DE85001383
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY
140501* -- Solar Energy Conversion-- Photovoltaic Conversion
CRYSTAL GROWTH METHODS
DENDRITIC WEB GROWTH METHOD
DIFFUSION LENGTH
DIMENSIONS
DIRECT ENERGY CONVERTERS
EQUIPMENT
HEAT TREATMENTS
LENGTH
MATHEMATICAL MODELS
PHOTOELECTRIC CELLS
PHOTOVOLTAIC CELLS
SILICON SOLAR CELLS
SOLAR CELLS
SOLAR EQUIPMENT
TWINNING