| abstract |
The present invention provides a photovoltaic semiconductor (1); And at least one layer (2) comprising a synthetic polymer (A) and a hindered amine light stabilizer (B). Hindered amine light stabilizers (B) are for example compounds of formula I: Wherein m is 1, Y is O, A is C 1 -C 19 alkylcarbonyl and Z 1 is C 2 -C substituted with C 1 -C 18 alkyl, C 5 -C 7 cycloalkyl or hydroxyl 12 alkyl. |