Improvement on the charge transport has been a crucial issue for the performance of organic solar cells. In this report, we present a simple way to enhance the short-circuit current (Jsc) with improved polymer/metal interfaces and electron extraction in P3HT:PCBM bulk heterojunction (BHJ) solar cells. The P3HT:PCBM BHJ layer is treated by ethylene glycol monomethyl ether (EGME) solvent to change its surface arrangement. Besides, the vertical phase separation of P3HT:PCBM BHJ layers spin-coated on different kinds of PEDOT:PSS substrate is also investigated. The efficacy of EGME solvent treatment is dependent on the vertical phase separation of P3HT:PCBM active layer. With the EGME solvent treatment, the Jsc can be increased by more than 20%.

Vertical phase separation dependent short-circuit current enhancement in P3HT:PCBM bulk heterojunction solar cells

243rd National Meeting (2012)

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