Claims
- 1. In a solar cell comprising a photoreactive layer and a primer coating on said photoreactive layer, the improvement comprising a substantially colorless transparent protective polymeric coating on said primer coating, said polymeric coating transmitting solar radiation and having high degradation resistance to solar radiation in the ultraviolet spectrum and low energy particle resistance, comprising a polyimide having the recurring structural unit: ##STR6## where R is: ##STR7## and where n is a number ranging from 10 to about 2000.
- 2. The improvement as defined in claim 1 where n is a number ranging from about 10 to about 1000.
- 3. The improvement as defined in claim 1, where R is ##STR8## said polymeric coating having a thickness of about 0.2 mil to 0.5 mil.
Parent Case Info
This is a division of application Ser. No. 451,137, filed Dec. 20, 1982 now abandoned.
US Referenced Citations (1)
Number |
Name |
Date |
Kind |
4542257 |
Fraser et al. |
Sep 1985 |
|
Divisions (1)
|
Number |
Date |
Country |
Parent |
451137 |
Dec 1982 |
|