Nanoforest of hydrothermally grown hierarchical ZnO nanowires for a high efficiency dye-sensitized solar cell.
By Seung Hwan Ko, Daeho Lee, Hyun Wook Kang, K. Nam, J. Yeo, Sukjoon Hong, Costas P. Grigoropoulos, Hyung Jin Sung. Nano letters (Print), 2011
988 citations recorded by the source corpus.
In this paper, in order to increase the power conversion efficiency we demonstrated the selective growth of "nanoforest" composed of high density, long branched "treelike" multigeneration hierarchical ZnO nanowire photoanodes. The overall light-conversion efficiency of the branched ZnO nanowire DSSCs was almost 5 times higher than the efficiency of DSSCs constructed by upstanding ZnO nanowires. The efficiency increase is due to greatly enhanced surface area for higher dye loading and light harvesting, and also due to reduced charge recombination by providing direct conduction pathways along the crystalline ZnO "nanotree" multi generation branches. We performed a parametric study to determine optimum hierarchical ZnO nanowire photoanodes through the combination of both length-wise growth and branched growth processes. The novel selective hierarchical growth approach represents a low cost, all solution processed hydrothermal method that yields complex hierarchical ZnO nanowire photoanodes by utilizing a simple engineering of seed particles and capping polymer.
Subfields: Materials Chemistry, Renewable Energy, Sustainability and the Environment
View Paper: https://www.semanticscholar.org/paper/0ac5c8ea31cad3a749f5659342623b95ff312534
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Citations in the corpus
- Synthesis, characterization, and applications of ZnO nanowires (2012, background): “Figure 19: (a) Schematic structure of a solar cell and (b) J-V curve of dye-sensitized solar cells with different fabricated ZnO nanowires (reproduced with permission from [87] ©2011 American Chemical Society).”
- Recent advances in photo‐anode for dye‐sensitized solar cells: a review (2017, background): “reported the fabrication of high-density hierarchical ZnO nanowires photo-anode with long-branched treelike ‘nanoforest’ configuration [150].”
- Silicon Nanowires for Solar Thermal Energy Harvesting: an Experimental Evaluation on the Trade-off Effects of the Spectral Optical Properties (2016, background): “Most of the research efforts up to date have been focused on photovoltaics and photocatalysis [10–16], and only a few nanomaterials have been applied in solar thermal energy conversion systems [4, 17–19].”