Synthesis of selenophene substituted benzodithiophene and fluorinated benzothiadiazole based conjugated polymers for organic solar cell applicationsElectrochimica ActaMakaleAli ÇIRPAN / Gönül HIZALAN OZSOY / Levent TOPPARESynthesis of selenophene substituted benzodithiophene and fluorinated benzothiadiazole based conjugated polymers for organic solar cell applications