Journal
ELECTROCHIMICA ACTA
Volume 255, Issue -, Pages 187-194Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2017.09.158
Keywords
Dye-sensitized solar cells; rutile TiO2 microsphere; TiO2 nanorod; self-assembly
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Funding
- National Natural Science Foundation of China [5177090655, 51379052]
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology [2016DX07]
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Light scattering capability is a significant factor for high efficiency dye sensitized solar cells (DSSCs), which is associated with the size and morphology of nanomaterials. Here, we reported a simple hydrothermal self-assembly method to synthesize size-controlled hierarchical rutile TiO2 microspheres (MS TiO2). The as-prepared uniform dandelion-like MS TiO2 were constructed with single rutile TiO2 nanorod unit. Due to the enhanced light scattering capability, improved electron transport and reduced charge recombination, the enhanced photovoltaic performance of solar cells have been obtained with MS TiO2 embedded in photoanodes. The resultant photovoltaic conversion efficiency up to 9.3% has been achieved, with short-circuit current density (JSC) and open circuit voltage (VOC) at 15.6 mA/cm(2) and 0.79 V, respectively, significantly higher than that of pure P25 film based photoanodes of similar thickness (7.37%). We believe this strategy would be favor for efficient DSSCs. (C) 2017 Elsevier Ltd. All rights reserved.
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