The Inverted Double Heterojunction Organic Photovoltaic Devices using Electrospun TiO2 Nanofibers

The introduction of electrospun TiO2 nanofibershas improved the performance of inverted poly (3-hexylthiophene) (P3HT) and (6, 6)- phenyl-C61- butyric acidmethyl ester (PCBM) solar cells by providing efficient chargegeneration and collection through double heterojunction.Electrospun TiO2 nanofibers increased the charge separation andcollecting capability of the devices both from P3HT and PCBM byproviding interfaces between P3HT-TiO2 and PCBM-TiO2nanofibers. The resulting devices have reached to maximumpower conversion efficiency (PCE) of 4.25±0.03% contributed byincreased short circuit current (Jsc).