Abstract
In this work, we have demonstrated that simple brush-painted Ti-doped In2O3(TIO) films can be used as a cost effective transparent anodes for organic solar cells (OSCs). By the direct brushing of TIO nanoparticles ink and rapid thermal annealing (RTA), we can simply obtain TIO electrodes with a low sheet resistance of 28.25 /□ and a high optical transmittance of 85.48% under atmospheric ambient conditions. In particular, the brush painted TIO films showed a much higher mobility (33.4 cm2/V s) than that of previously reported solution-process transparent oxide films (1-5 cm2/V s) due to the effects of the Ti dopant with higher Lewis acid strength (3.06) and the reduced contact resistance of TIO nanoparticles. The OSCs fabricated on the brush-painted TIO films exhibited cell-performance with an open circuit voltage (Voc) of 0.61 V, shot circuit current (J sc) of 7.90 mA/cm2, fill factor (FF) of 61%, and power conversion efficiency (PCE) of 2.94%. This indicates that brush-painted TIO film is a promising cost-effective transparent electrode for printing-based OSCs with its simple process and high performance.
Original language | English |
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Pages (from-to) | 241-250 |
Number of pages | 10 |
Journal | Solar Energy Materials and Solar Cells |
Volume | 122 |
DOIs | |
State | Published - Mar 2014 |
Keywords
- Brush-painting
- Indium titanium oxide
- Organic solar cells
- Rapid thermal annealing
- Transparent electrode