Advanced photovoltaic concentrator cells. Annual report, August 28, 1979-August 28, 1980

Technical Report · Thu Oct 01 04:00:00 EDT 1981

DOI:https://doi.org/10.2172/5251269· OSTI ID:5251269

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

The first year activities are described 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 SUNs AM1 illumination and 25% conversion efficiency with a converter operating at 150/sup 0/C under 500 to 1000 SUNs 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 subcells are to be fabricated using MO-CVD or LPE to produce the needed AlGaAs layers of optimized composition, thickness and doping to produce high performance, heteroface homojunction devices. The low band-gap subcells are to be similarly fabricated from AlGa(As)Sb compositions by LPE. These subcells are then to be joined into a monolithic structure by an appropriate mechanical bonding technique which will also form the needed transparent intercell ohmic contact (IOC) between the two subcells. The major areas of activity are device modeling, materials development, and device fabrication and characterization. The accomplishments as well as the detailed approaches and results of these major areas have been described and discussed.

• Research Organization: Solar Energy Research Inst., Golden, CO (USA); Rockwell International Corp., Thousand Oaks, CA (USA). Electronics Research Center
• DOE Contract Number: AC02-77CH00178
• OSTI ID: 5251269
• Report Number(s): SERI/PR-8058-2-T4; ON: DE82012583
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY
140501* -- Solar Energy Conversion-- Photovoltaic Conversion
ANTIMONY COMPOUNDS
ARSENIC COMPOUNDS
ARSENIDES
CASCADE SOLAR CELLS
CHEMICAL COATING
CHEMICAL VAPOR DEPOSITION
CONCENTRATION RATIO
CONCENTRATOR SOLAR CELLS
DEPOSITION
DIRECT ENERGY CONVERTERS
EFFICIENCY
ELECTRIC CONTACTS
ELECTRICAL EQUIPMENT
EPITAXY
EQUIPMENT
FABRICATION
GALLIUM ANTIMONIDES
GALLIUM ARSENIDES
GALLIUM COMPOUNDS
HOMOJUNCTIONS
JUNCTIONS
MATERIALS
MATHEMATICAL MODELS
OPTICAL PROPERTIES
PHOTOELECTRIC CELLS
PHOTOVOLTAIC CELLS
PHYSICAL PROPERTIES
PNICTIDES
REFLECTIVITY
SEMICONDUCTOR JUNCTIONS
SOLAR CELLS
SOLAR EQUIPMENT
SPECTRAL RESPONSE
SURFACE COATING
SURFACE PROPERTIES
TESTING