Abstract
Organic solar cells were fabricated by spray deposition of highly conductive PEDOT:PSS. Both PEDOT:PSS (Clevios PH750) and an active layer were spray deposited by the substrate heating method. In order to improve the conductivity of spray-deposited PEDOT:PSS, DMF or DMSO was added to it. As a result, surface morphology of PEDOT:PSS with DMSO-(/DMF) changed and its conductivity improved by about 10,000 times that of pure PEDOT:PSS. Solar cells fabricated using spray-deposited DMSO-added PEDOT:PSS as a transport layer showed a power conversion efficiency (PCE) of ∼3%, an open voltage of 0.62 V, and a short circuit current of 14.02 mA/cm 2.
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