The Novel Organic Photovoltaic Cell Using Inter-layer for Hole-electron Separation

We investigated organic photovoitaic (OPV) cells using holeelectron separation interlayer for improving conversion efficiency. The novel structure of OPV cell was composed of ITO / PEDOT:PSS / DPASN / P3HT:PC71BM / Liq / AI. OPV device inserting DP ASN has 2.28% of energy conversion efficiency higher than 1.99% of conventional OPV cell. DPASN layer effected on blocking electron transfer to anode electrode by their LUMO and HOMO energy levels of DPASN whereas DPASN mixing layer with P3HT:PC71BM restricted holes and electrons separation in the active layer when light absorption occurred due to changing Voc.