Advanced photovoltaic concentrator cells. Quarterly technical progress report No. 2, 1 December 1979-29 February 1980

Technical Report · Tue Jan 01 04:00:00 EST 1980

DOI:https://doi.org/10.2172/5305609· OSTI ID:5305609

Zehr, S. W.; Yang, H. T.; Yang, J. J.; Harris, Jr., J. S.

This report describes second quarter activities for a project aimed at demonstrating the technical feasibility of advanced high efficiency concentrator solar converters. The goal of the program is to achieve 30% conversion efficiency with a converter operating at 30/sup 0/C under 500 to 1000 SUN AM2 illumination and 25% conversion efficiency with a converter operating at 150/sup 0/C under 500 to 1000 SUN AM2 illumination. The approach is to fabricate two cell, non-lattice matched, monolithic stacked converters using optimum pairs of cells having bandgaps in the range of 1.6 to 1.7 eV and 0.95 to 1.1 eV. The high bandgap cells are to be fabricated using MOCVD or LPE to produce the needed AlGaAs layers of optimized composition, thickness and doping to produce high performance, heteroface homojunction devices. The low bandgap cells are to be similarly fabricated from AlGaSb(As) compositions by LPE. These subcells are then to be joined into a monolithic structure by an appropriate thermal bonding technique which will also form the needed transparent intercell ohmic contact (IOC) between the two subcells. The activities this quarter have been largely focused on the development and study of low bandgap cell structures and attempts to develop suitable techniques for the thermal bonding operation.

• Research Organization: Rockwell International Corp., Thousand Oaks, CA (USA). Science Center; Rockwell International Corp., Anaheim, CA (USA). Electronics Research Div.
• DOE Contract Number: AC02-77CH00178
• OSTI ID: 5305609
• Report Number(s): DSE-4042-T40
• 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
ALUMINIUM ARSENIDES
ALUMINIUM COMPOUNDS
ANTIMONY COMPOUNDS
ARSENIC COMPOUNDS
ARSENIDES
BONDING
CHEMICAL COATING
CHEMICAL VAPOR DEPOSITION
CONCENTRATOR SOLAR CELLS
DEPOSITION
DIRECT ENERGY CONVERTERS
ELECTRIC CONTACTS
ELECTRICAL EQUIPMENT
ELECTRICAL PROPERTIES
EPITAXY
EQUIPMENT
FABRICATION
GALLIUM ARSENIDE SOLAR CELLS
GALLIUM ARSENIDES
GALLIUM COMPOUNDS
GRADED BAND GAPS
JOINING
PERFORMANCE
PHOTOELECTRIC CELLS
PHOTOVOLTAIC CELLS
PHYSICAL PROPERTIES
PNICTIDES
SOLAR CELLS
SOLAR EQUIPMENT
SPECTRAL RESPONSE
SUBSTRATES
SURFACE COATING