Interfacial nanostructuring on the performance of polymer/TiO2 nanorod bulk heterojunction solar cells.
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.
Lin
Yun-Yue
YY
Department of Materials Science and Engineering and Center for Condensed Matter Sciences, National Taiwan University, Taipei 106, Taiwan.
Chu
Tsung-Hung
TH
Li
Shao-Sian
SS
Chuang
Chia-Hao
CH
Chang
Chia-Hao
CH
Su
Wei-Fang
WF
Chang
Ching-Pin
CP
Chu
Ming-Wen
MW
Chen
Chun-Wei
CW