TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Composition: The organic layer further includes hole-transport layer, hole injection layer, electron injection layer and electron-transport layer. The photoactive layer further contains electron donor and electron acceptor. The electron acceptor is chosen from fullerene, fullerene derivative, carbon nanotube, carbon nanotube derivative, semiconductive element and/or semiconductive compound. SPECIFIC COMPOUNDS - 9 Metal complexes are specifically claimed e.g. 7'-(2-(5-(2-ethylhexyl)-3H-1-thiophen-2-yl)-8-(5-(2-ethylhexyl)thiophen-2-yl)-5-((1S)-13'-(5-hexylthiophen-2-yl)-3,5-dimethyl-2,6-dioxa-4',14'-dithia-3',5',9'-triaza-1-platinaspiro(cyclohexane-1,10'-tetracyclo(7.6.0.02,6.011,15)pentadecan)-1'(9'),2,2',4,5',7',11'(15'),12'-octaen-7'-yl)-4,11-dithiatricyclo(7.3.0.03,7)dodeca-1,3(7),5,8,11-pentaen-11-yl)-13'-(5-hexylthiophen-2-yl)-3,5-dimethyl-2,6-dioxa-4',14'-dithia-3',5',9'-triaza-1-platinaspiro(cyclohexane-1,10'-tetracyclo(7.6.0.02,6.011,15)pentadecan)-1'(9'),2,2',4,5',7',11'(15'),12'-octaene of formula (Ia), (1S)-7'-(7-(2-ethylhexyl)-10-(13'-(5-hexylthiophen-2-yl)-3,5-dimethyl-2,6-dioxa-4',14'-dithia-3',5',9'-triaza-1-platinaspiro(cyclohexane-1,10'-tetracyclo(7.6.0.02,6.011,15)pentadecan)-1'(9'),2,2',4,5',7',11'(15'),12'-octaen-7'-yl)-3,11-dithia-7-azatricyclo(6.3.0.02,6)undeca-1(8),2(6),4,9-tetraen-4-yl)-13'-(5-hexylthiophen-2-yl)-3,5-dimethyl-2,6-dioxa-4',14'-dithia-3',5',9'-triaza-1-platinaspiro(cyclohexane-1,10'-tetracyclo(7.6.0.02,6.011,15)pentadecan)-1'(9'),2,2',4,5',7',11'(15'),12'-octaene, 13'-(5-hexylthiophen-2-yl)-3,5-dimethyl-7'-(9,9,18,18-tetrakis(4-hexylphenyl)-15-((1S)-13'-(5-hexylthiophen-2-yl)-3,5-dimethyl-2,6-dioxa-4',14'-dithia-3',5',9'-triaza-1-platinaspiro(cyclohexane-1,10'-tetracyclo(7.6.0.02,6.011,15)pentadecan)-1'(9'),2,2',4,5',7',11'(15'),12'-octaen-7'-yl)-5,14-dithiapentacyclo(10.6.0.03,10.04,8.013,17)octadeca-1(12),2,4(8),6,10,13(17),15-heptaen-6-yl)-2,6-dioxa-4',14'-dithia-3',5',9'-triaza-1-platinaspiro(cyclohexane-1,10'-tetracyclo(7.6.0.02,6.011,15)pentadecan)-1'(9'),2,2',4,5',7',11'(15'),12'-octaene, 7'-(7,7-bis(2-ethylhexyl)-10-((1S)-13'-(5-hexylthiophen-2-yl)-3,5-dimethyl-2,6-dioxa-4',14'-dithia-3',5',9'-triaza-1-platinaspiro(cyclohexane-1,10'-tetracyclo(7.6.0.02,6.011,15)pentadecan)-1'(9'),2,2',4,5',7',11'(15'),12'-octaen-7'-yl)-3,11-dithia-7-silatricyclo(6.3.0.02,6)undeca-1(8),2(6),4,9-tetraen-4-yl)-13'-(5-hexylthiophen-2-yl)-3,5-dimethyl-2,6-dioxa-4',14'-dithia-3',5',9'-triaza-1-platinaspiro(cyclohexane-1,10'-tetracyclo(7.6.0.02,6.011,15)pentadecan)-1'(9'),2,2',4,5',7',11'(15'),12'-octaene and 7'-(7,7-bis(2-ethylhexyl)-10-((1S)-13'-(5-hexylthiophen-2-yl)-3,5-dimethyl-2,6-dioxa-4',14'-dithia-3',5',9'-triaza-1-platinaspiro(cyclohexane-1,10'-tetracyclo(7.6.0.02,6.011,15)pentadecan)-1'(9'),2,2',4,5',7',11'(15'),12'-octaen-7'-yl)-3,11-dithiatricyclo(6.3.0.02,6)undeca-1(8),2(6),4,9-tetraen-4-yl)-13'-(5-hexylthiophen-2-yl)-3,5-dimethyl-2,6-dioxa-4',14'-dithia-3',5',9'-triaza-1-platinaspiro(cyclohexane-1,10'-tetracyclo(7.6.0.02,6.011,15)pentadecan)-1'(9'),2,2',4,5',7',11'(15'),12'-octaene.