High-efficiency silicon solar cells for use with a prismatic cover at 160 suns

Technical Report · Wed Aug 01 04:00:00 EDT 1990

DOI:https://doi.org/10.2172/6565556· OSTI ID:6565556

Silver, J R; Patel, B ^[1]

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1. Solarex Corp., Rockville, MD (USA)

For this program, Solarex developed a process sequence that could be used in a manufacturing environment to produce high-efficiency silicon concentrator cells. The cells had large gridlines to minimize series resistance losses and a prismatic cover to minimize shadowing. The front surface of the cell was textured to improve absorption of light and passivated to reduce front-surface recombination. Two separate diffusions steps were used: a deep emitter with a light surface concentration and a heavy diffusion to reduce recombination under the front contacts. Cell efficiencies as high as 22.25% were demonstrated at 75 suns and over 21.5% at 150 suns air mass 1.5 illumination. 16 refs., 31 figs., 10 tabs.

• Research Organization: Sandia National Labs., Albuquerque, NM (USA); Solarex Corp., Rockville, MD (USA). Aerospace Div.
• Sponsoring Organization: DOE/CE
• DOE Contract Number: AC04-76DP00789
• OSTI ID: 6565556
• Report Number(s): SAND-90-7030; ON: DE91000468
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY
140501* -- Solar Energy Conversion-- Photovoltaic Conversion
36 MATERIALS SCIENCE
360601 -- Other Materials-- Preparation & Manufacture
CONCENTRATOR SOLAR CELLS
CONTROL
DIRECT ENERGY CONVERTERS
EFFICIENCY
ENERGY LOSSES
EQUIPMENT
FABRICATION
LOSSES
MANUFACTURING
OPTICAL PROPERTIES
PHOTOELECTRIC CELLS
PHOTOVOLTAIC CELLS
PHYSICAL PROPERTIES
PROCESS CONTROL
SILICON SOLAR CELLS
SOLAR CELLS
SOLAR EQUIPMENT