期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 5, 期 16, 页码 7516-7522出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6ta11012f
关键词
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资金
- Cluster of Excellence Engineering of Advanced Materials (EAM) in the frame of the DFG excellence programs
- DFG
- ICMM
- ZMP
- Australian Research Council Centre of Excellence Scheme [CE 140100012]
- University of Wollongong
A novel concept for constructing optimized ZnO-based photoanodes as integrative components of dye-sensitized solar cells (DSSCs) is realized by deploying differently sized nanoparticles, ranging from 2 to 10 nm, together with commercially available 20 nm nanoparticles. The 2 nm nanoparticles were used to construct an efficient buffer layer for transparent electrodes based on 10 nm nanoparticles, resulting in a relative increase of device efficiency from 1.8 to 3.0% for devices without and with a buffer layer, respectively. A mixture of 10 and 20 nm nanoparticles was optimized to maximize the diffuse reflection and to minimize the charge transport resistance in a light-scattering layer. This optimization resulted in a homogenous layer of more than 15 mm that provided a device efficiency of 3.3%. The buffer layer, transparent electrode, and light-scattering electrode, were then combined to give an overall efficiency of around 5%. Thus, this work demonstrates that varying the electrode architecture with nanoparticles of different diameters is a powerful strategy for improving the overall efficiency of ZnO-based DSSCs.
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