1. Controllable Preparation of Rutile TiO2 Nanorod Array for Enhanced Photovoltaic Performance of Perovskite Solar Cells
- Author
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Shufang Wu, Chi Chen, Tianyou Peng, Jiangrong Xiao, and Jinming Wang
- Subjects
Materials science ,Energy Engineering and Power Technology ,Perovskite solar cell ,chemistry.chemical_element ,02 engineering and technology ,Substrate (electronics) ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Tin oxide ,01 natural sciences ,Hydrothermal circulation ,0104 chemical sciences ,Chemical engineering ,chemistry ,Rutile ,Materials Chemistry ,Electrochemistry ,Chemical Engineering (miscellaneous) ,Nanorod ,Electrical and Electronic Engineering ,0210 nano-technology ,Perovskite (structure) ,Titanium - Abstract
A vertically oriented rutile TiO2 nanorod (NR) array, as an efficient electron transport layer (ETL), has been used in the perovskite solar cells (PSCs), and its microstructure has a great impact on the corresponding photovoltaic conversion efficiency (PCE). Here we employ a facile control strategy to modulate the microstructures of rutile TiO2 NR arrays hydrothermally grown on the fluorine tin oxide (FTO) glass from a water–HCl solution of titanium n-butoxide (TBOT). It was found that introducing commercial TiO2 nanoparticles (P25, Degussa) into the hydrothermal reaction system can efficiently slow down the growth rate of rutile TiO2 NRs, thus causing the controllable preparation of an NR array on the FTO substrate. The device fabricated with an optimized NR array derived from the hydrothermal reaction solution containing P25 exhibits an improvement of 26.5% in PCE compared with the device fabricated with the NR array from the hydrothermal solution without P25, which is mainly attributed to the reduced c...
- Published
- 2018