Advanced photovoltaic concentrator cells. Quarterly technical progress report No. 1, August 28, 1979-November 30, 1979

Technical Report · Sat Dec 01 04:00:00 EST 1979

DOI:https://doi.org/10.2172/5381019· OSTI ID:5381019

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

First quarter activities for a project aimed at demonstrating the technical feasibility of advanced high efficiency concentrator solar converters are described. 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: Solar Energy Research Inst., Golden, CO (USA)
• OSTI ID: 5381019
• Report Number(s): DSE-4042-T30
• 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
ARSENIC COMPOUNDS
ARSENIDES
BONDING
CHEMICAL COATING
CHEMICAL VAPOR DEPOSITION
CONCENTRATION RATIO
CONCENTRATOR SOLAR CELLS
DEPOSITION
DESIGN
DIRECT ENERGY CONVERTERS
EFFICIENCY
ELECTRIC CONTACTS
ELECTRICAL EQUIPMENT
EPITAXY
EQUIPMENT
FABRICATION
GALLIUM ARSENIDE SOLAR CELLS
GALLIUM ARSENIDES
GALLIUM COMPOUNDS
GRADED BAND GAPS
JOINING
MATHEMATICAL MODELS
OPTIMIZATION
PHOTOELECTRIC CELLS
PHOTOVOLTAIC CELLS
PNICTIDES
SOLAR CELLS
SOLAR EQUIPMENT
SPECTRAL RESPONSE
SUBSTRATES
SURFACE COATING