Dye-sensitized solar cells with 3D flower-like α-Fe2O3-decorated reduced graphenes oxide as photoanodes
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- 作者：Xin Shang ; Zhiqiang Guo ; Wei Gan ; Ru Zhou ; Cheng Ma ; Ke Hu ; Haihong Niu…
- 关键词：Hematite ; Three ; dimensional hierarchical ; Reduced graphene oxide ; Photoanode ; Dye ; sensitized solar cells
- 刊名：Ionics
- 出版年：2016
- 出版时间：March 2016
- 年：2016
- 卷：22
- 期：3
- 页码：435-443
- 全文大小：1,854 KB
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Zhiqiang Guo (1)
Wei Gan (1)
Ru Zhou (1)
Cheng Ma (1)
Ke Hu (1)
Haihong Niu (1)
Jinzhang Xu (1)
1. School of Electrical Engineering and Automation, Hefei University of Technology, Hefei, 230009, Anhui Province, People’s Republic of China - 刊物类别：Chemistry and Materials Science
- 刊物主题：Chemistry
Electrochemistry
Materials Science
Physical Chemistry
Condensed Matter
Renewable Energy Sources
Electrical Power Generation and Transmission - 出版者：Springer Berlin / Heidelberg
- ISSN：1862-0760
文摘
For the first time, we report a one-step fabrication of an environment-friendly approach to synthesize flower-like α-Fe2O3 hierarchical nanoparticles (NPs)/reduced graphene oxide (RGO) hybrids by combining the graphene oxide (GO) with the growth of α-Fe2O3 NPs. The GO sheet which possesses the functional group, such as hydroxyl (–OH) and carbonyl groups (–OOH), can be easily incorporated with the petal of the flower-like α-Fe2O3 in ethanol and water solution through a solvothermal process, during which GO is reduced to RGO without the addition of any strong reducing agent or requiring any post-high-temperature annealing process. The as-prepared samples are loose and porous with flower-like structure, and the RGO hybrids were wrapped up uniformly on the sheet of α-Fe2O3 NPs. To demonstrate the potential applications, we have fabricated dye-sensitized solar cells (DSSCs) from the as-synthesized hierarchical flower-like α-Fe2O3/RGO and investigated it for the photoanode of DSSCs. Results show that the hierarchical α-Fe2O3/RGO solar cell exhibits improved performances in comparison with the free α-Fe2O3 NPs. The enhancement of photovoltaic properties is attributed to the unique porous nature and good conductivity which allow more efficient diffusion of I− ions and facilitate the transfer of electron in the network.