Lei, Bing-Xin Hierarchical TiO2 flowers built from TiO2 nanotubes for efficient Pt-free based flexible dye-sensitized solar cells. [electronic resource] - Physical chemistry chemical physics : PCCP Oct 2012 - 13175-9 p. digital Publication Type: Journal Article ISSN: 1463-9084 Standard No.: 10.1039/c2cp42746j doi