High efficiency Cu(In,Ga)Se{sub 2}-based solar cells: Processing of novel absorber structures

Book · Sat Dec 31 00:00:00 EST 1994

OSTI ID:208013

Contreras, M A; Tuttle, J; Gabor, A ^[1]

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1. National Renewable Energy Lab., Golden, CO (United States); and others

Effort towards the attainment of high performance devices has yielded several devices with total-area conversion efficiencies above 16%, the highest measuring 16.8% under standard reporting conditions (ASTM E892-87, Global 1,000 W/m{sup 2}). The first attempts to translate this development to larger areas resulted in an efficiency of 12.5% for a 16.8-cm{sup 2} monolithically interconnected submodule test structure, and 15.3% for a 4.85-cm{sup 2} single cell. Achievement of a 17.2% device efficiency fabricated for operation under concentration (22-sun) is also reported. All high efficiency devices reported here are made from graded bandgap absorbers. Bandgap grading is achieved by compositional Ga/(In+Ga) profiling as a function of depth. The fabrication schemes to achieve the graded absorbers, the window materials and contacting will be described.

• DOE Contract Number: AC36-83CH10093
• OSTI ID: 208013
• Report Number(s): CONF-941203-; ISBN 0-7803-1459-X; TRN: IM9616%%341
• Resource Relation: Conference: 1. world conference on photovoltaic energy conversion, Waikoloa, HI (United States), 5-9 Dec 1994; Other Information: PBD: 1994; Related Information: Is Part Of 1994 IEEE first world conference on photovoltaic energy conversion: Conference record of the twenty fourth IEEE photovoltaic specialists conference -- 1994. Volume 1; PB: 1303 p.
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
14 SOLAR ENERGY
COPPER SELENIDE SOLAR CELLS
SOLAR ABSORBERS
INDIUM SELENIDE SOLAR CELLS
FABRICATION
INDIUM SELENIDES
PHYSICAL VAPOR DEPOSITION
GALLIUM SELENIDES
ENERGY EFFICIENCY
GRADED BAND GAPS
BACK CONTACT SOLAR CELLS
MAGNESIUM FLUORIDES
ANTIREFLECTION COATINGS
X-RAY DIFFRACTION
SCANNING ELECTRON MICROSCOPY
PERFORMANCE
EXPERIMENTAL DATA