Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: A cylindrical core-shell-like TiO2 nanotube array anode for flexible fiber-type dye-sensitized solar cells | Yu et al. Nanoscale Research Letters 2011 6 94 http content 6 1 94 o Nanoscale Research Letters a SpringerOpen Journal NANO EXPRESS Open Access A cylindrical core-shell-like TiO2 nanotube array anode for flexible fiber-type dye-sensitized solar cells Jiefeng Yut Dan Wang1 Yining Huang Xing Fan Xin Tang Cong Gao Jianlong Li Dechun Zou Kai Wu Abstract A versatile anodization method was reported to anodize Ti wires into cylindrical core-shell-like and thermally crystallized TiO2 nanotube TNT arrays that can be directly used as the photoanodes for semi- and all-solid fibertype dye-sensitized solar cells F-DSSC . Both F-DSSCs showed higher power conversion efficiencies than or competitive to those of previously reported counterparts fabricated by depositing TiO2 particles onto flexible substrates. The substantial enhancement is presumably attributed to the reduction of grain boundaries and defects in the prepared TNT anodes which may suppress the recombination of the generated electrons and holes and accordingly lead to more efficient carrier-transfer channels. Introduction Conventional flexible fiber-type dye-sensitized solar cells F-DSSCs based on polymer ITO indium tin oxides usually suffer from several problems such as cost inefficiency stringent temperature restriction and lightreception-angle limitation. Recent advances in fiber- and mesh-type DSSCs that can be woven into a variety of shapes and forms provide a potential solution to above problems 1-3 . TiO2 electrodes can be fabricated by depositing a layer of disordered TiO2 particles on flexible substrates or fibers. However this method can lead to twisted carrier-transfer channels that thereafter lower the efficiencies. This disadvantage can be presumably overcome by employing a fiber-like anode with a hierarchical crystalline TiO2 nanostructure which may reduce the grain boundaries and defects and thus leads to more efficient carrier-transfer channels. To achieve this goal it is .
