Speakers
Description
Perylene derivative were used as electron acceptor in non-fullerene organic solar cells using the structure of ITO/PEDOT:PSS/PCDTBT:Acceptor/TiO$_x$/Al. Unfortunately, PCDTBT:Perylenediimide photoactive device showed a low power conservation efficiency (PCE),compared to a PCDTBT:PC$_{70}$BM photoactive device. This results has been observed in reduced short circuit current (I$_{sc}$ ) and open circuit voltage (V$_{oc}$). The devices with electron acceptors as Perylene diimide-1 and Perylene diimide-2 showed excellent efficiency of 0.27% and 0.26%, respectively, with weight ratio of PCDTBT:acceptor (1:2). In addition, the morphological and optical properties of PCDTBT:acceptor thin films were investigated. The high roughness and low absorbance due to the perylene network were consistent with the low efficiency of solar cells.
