Abstract
Perylene derivative were used as electron acceptor in non-fullerene organic solar cells using the structure of ITO/PEDOT:PSS/PCDTBT:Acceptor/TiOx/Al. Using a new perylene structure, PCDTBT:Perylene diimide photoactive device showed a low power conservation efficiency (PCE), compared to a PCDTBT:PC70BM photoactive device. This result has been observed in reduced short circuit current (Isc) and open circuit voltage (Voc). The devices with electron acceptors as bis-perylene diimide-1 and bis-perylene diimide-2 all showed excellent efficiency of 0.27%, with weight ratio of PCDTBT:acceptor (1:2). In addition, the morphologies and optical properties of PCDTBT:acceptor thin films were investigated. The high roughness and low absorbance due to the perylene derivatives were consistent with the low efficiency of solar cells.
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