Interfacial Nanostructuring on the Performance of Polymer/TiO2 Nanorod Bulk Heterojunction Solar Cells
Authors:
- Shao-Sian LiSLShao-Sian Li
- Chia-Hao ChuangCCChia-Hao Chuang
- Chia-Hao ChangCCChia-Hao Chang
- Wei-Fang SuWSWei-Fang Su
- 12 February 2009
- journal article
- research article
- Published by American Chemical Society (ACS) in Journal of the American Chemical Society
- Vol. 131 (10) , 3644-3649
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 (Jsc) of 4.33 mA/cm2, an open circuit voltage (Voc) 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.Keywords
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