NON-FULLERENE ORGANIC PHOTOVOLTAICS BASED ON THIENOPYROLEDIONE COMPRİSİNG RANDOM COPOLYMERS;EFFECT OF ALKYL CHAINS Renewable EnergyMakaleAli ÇIRPAN / Eda Alemdar / Levent TOPPARE / Mustafa Yasa / Serife O. Hacioglu / Tolga DepciNON-FULLERENE ORGANIC PHOTOVOLTAICS BASED ON THIENOPYROLEDIONE COMPRİSİNG RANDOM COPOLYMERS;EFFECT OF ALKYL CHAINS