title: Interfacial nanostructuring on the performance of polymer/TiO2 nanorod bulk heterojunction solar cells.
abstract: This work presents polymer photovoltaic devices based on poly(3-hexylthiophene) (P3HT) and TiO2 nanorod hybrid bulk heterojunctions. Interface modification of a TiO2 nanorod surface is conducted to yield a very promising device performance of 2.20% with a short circuit current density (J(sc)) of 4.33 mA/cm2, an open circuit voltage (V(oc)) of 0.78 V, and a fill factor (FF) of 0.65 under simulated A.M. 1.5 illumination (100 mW/cm2). The suppression of recombination at P3HT/TiO2 nanorod interfaces by the attachment of effective ligand molecules substantially improves device performance. The correlation between surface photovoltage and hybrid morphology is revealed by scanning Kelvin probe microscopy. The proposed method provides a new route for fabricating low-cost, environmentally friendly polymer/inorganic hybrid bulk heterojunction photovoltaic devices.
authors.affiliation: Department of Materials Science and Engineering and Center for Condensed Matter Sciences, National Taiwan University, Taipei 106, Taiwan.
authors.forename: Yun-Yue
authors.initials: YY
authors.lastname: Lin
authors.forename: Tsung-Hung
authors.initials: TH
authors.lastname: Chu
authors.forename: Shao-Sian
authors.initials: SS
authors.lastname: Li
authors.forename: Chia-Hao
authors.initials: CH
authors.lastname: Chuang
authors.forename: Chia-Hao
authors.initials: CH
authors.lastname: Chang
authors.forename: Wei-Fang
authors.initials: WF
authors.lastname: Su
authors.forename: Ching-Pin
authors.initials: CP
authors.lastname: Chang
authors.forename: Ming-Wen
authors.initials: MW
authors.lastname: Chu
authors.forename: Chun-Wei
authors.initials: CW
authors.lastname: Chen