Synthesis and photoelectrical properties of hierarchical-structured anatase TiO2 nanoflowers
Received date: 2018-05-17
Online published: 2018-12-23
杨煌, 李祎, 王锐, 杨伟光 . 复合分级结构的锐钛矿 TiO2 纳米花的合成及其光电性能[J]. 上海大学学报(自然科学版), 2020 , 26(4) : 544 -551 . DOI: 10.12066/j.issn.1007-2861.2087
Oxide semiconductor nanomaterials are used as aonde materials for dye- sensitized solar cells (DSSCs). One-dimensional nanostructures have enhanced electron collection of carriers and superior charge transport compared to spherical nanoparticles. However, they suffer from low dye-loading caused by small surface areas and unfavorable arrangement for a photo-generated electron extraction. Anatase TiO2 nanorods-based nanoflowers have been successfully synthesized using a simple one-step hydrothermal method. Such hierarchical nanostructures can be controlled by reaction time. The dye absorption capacities of the as-obtained hierarchical nanostructures increase with the reaction time. The highest cell efficiency (7.29%) of the DSSC is achieved through the TiO2 nanoflowers prepared for 70 h.
Key words： TiO2 ; nanoflowers; dye-sensitized solar cells; anode
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