Rational Surface Engineering of Anatase Titania Core鈥揝hell Nanowire Arrays: Full-Solution Processed Synthesis and Remarkable Photovoltaic Performance
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- 作者：Wu-Qiang Wu ; Hao-Lin Feng ; Hua-Shang Rao ; Dai-Bin Kuang ; Cheng-Yong Su
- 刊名：ACS Applied Materials & Interfaces
- 出版年：2014
- 出版时间：November 12, 2014
- 年：2014
- 卷：6
- 期：21
- 页码：19100-19108
- 全文大小：424K
- ISSN：1944-8252
文摘
The high-performance of a well-aligned 1D nanostructured electrode relies largely on a smart and rational modification with other active nanomaterials. Herein, we present a facile solution-based route to fabricate a well-aligned metal oxide-based core鈥搒hell hybrid arrays on TCO substrate. Demonstrated samples included nanowire@nanoparticle (TNW@NP) or nanowire@nanosheet (TNW@NS) with a unique porous core/shell nanowire arrays architecture in the absence or presence of DETA during the solvothermal treatment process. The 鈥渁lcoholysis鈥?and 鈥渞ipening鈥?growth mechanism is proposed to explain the formation of honeycomb-like nanosheets shell on nanowires core. Based on careful control of experimental condition, a novel double layered TiO2 photoanode (DL-TNW@NS-YSHTSs) consisting of 16 渭m thick TNW@NS under layer and 6 渭m thick yolk鈥搒hell hierarchical TiO2 microspheres (YSHTSs) top layer can be obtained, exhibiting an impressive PCE over 10% at 100 mW cm鈥?, which can be attributed to the well-organized photoanode composed of hierarchical core鈥搒hell arrays architecture and yolk鈥搒hell hollow spheres architecture with synergistic effects of high dye loading and superior light scattering for prominent light harvesting efficiency.