TECSTAR has made significant progress in improving the efficiency and yield
of multijunction (Cascade(R)) solar cells. TECSTAR has produced 27.0% effi
cient 2 cm x 2 cm Cascade(R) cells through improvements in material quality
and cell structures. Radiation performance of these cells has also improve
d. The remaining power after 1E15 e/cm(2), 1 MeV electron irradiation is gr
eater than 80%. In addition, TECSTAR has successfully developed an integral
bypass diode, grown monolithically with the Cascade" cell. No degradation
in the diode performance after subjected to 1E15e(-)/cm(2), 1 MeV electron
irradiation and no degradation in the CIC assemblies after subjected to 300
0 cycles of dark reverse test. (C) 2001 Published by Elsevier Science B.V.
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