Accession Number : AD0871268

Title :   Lithium Doped Hardened Solar Cell Optimization. Part I. Solar Cell and Test Equipment Development.

Descriptive Note : Final technical progress rept. 1 Dec 67-1 May 70,

Corporate Author : HELIOTEK SYLMAR CA

Personal Author(s) : Ralph, Eugene L. ; Payne, Patricia A. ; Zimmerman, Edward F. ; Somberg, Howard ; Lovelady, James N.

Report Date : MAY 1970

Pagination or Media Count : 93

Abstract : The report describes the work done on developing a hardened lithium doped P/N silicon solar cell. Part I includes studies of the solar cell, the method of depositing an integral cover, the method of interconnecting cells, the design of a flexible array and the design of a solar cell automatic test system. Hardened lithium solar cell performance characteristics (10% to 12% efficiencies) were shown to be similar to conventional N/P solar cells. Methods for reliably interconnecting the cells with a wraparound interconnector and mounting the cells on a flexible substrate are presented. An ultrasonic bonding technique was developed which provided a solderless method for bonding the interconnector metal tabs to the solar cell. Experiments showed that hardened cells and complete arrays were thermal cycled from -196C to 400C without failure. (Author)

Descriptors :   (*SOLAR CELLS, HARDENING), DOPING, LITHIUM, DAMAGE, RADIATION EFFECTS, DEPOSITION, MANUFACTURING, COATINGS, SOLAR PANELS, CIRCUIT INTERCONNECTIONS, SUBSTRATES, BONDING, TEST EQUIPMENT, ENVIRONMENTAL TESTS.

Subject Categories : Electric Power Production and Distribution

Distribution Statement : APPROVED FOR PUBLIC RELEASE