Title: Flexible Silver Nanowire Meshes for High-Efficiency Microtextured Organic-Silicon Hybrid Photovoltaics
Authors: Chen, Ting-Gang
Huang, Bo-Yu
Liu, Hsiao-Wei
Huang, Yang-Yue
Pan, Huai-Te
Meng, Hsin-Fei
Yu, Peichen
Institute of Physics
Department of Photonics
Keywords: silver nanowire;solution process;conductive polymer;photovoltaics
Issue Date: 1-Dec-2012
Abstract: Hybrid organic-silicon heterojunction solar cells promise a significant reduction on fabrication costs by avoiding energy-intensive processes. However, their scalability remains challenging without a low-cost transparent electrode. In this work, we present solution-processed silver-nanowire meshes that uniformly cover the microtextured surface of hybrid heterojunction solar cells to enable efficient carrier collection for large device area. We systematically compare the characteristics and device performance with long and short nanowires with an average length/diameter of 30 mu m/115 nm and 15 mu m/45 nm, respectively, to those with silver metal grids. A remarkable power conversion efficiency of 10.1% is achieved with a device area of 1 x 1 cm(2) under 100 mW/cm(2) of AM1.5G illumination for the hybrid solar cells employing long wires, which represents an enhancement factor of up to 36.5% compared to the metal grid counterpart. The high-quality nanowire network displays an excellent spatial uniformity of photocurrent generation via distributed nanowire meshes and low dependence on efficient charge transport under a high light-injection condition with increased device area. The capability of silver nanowires as flexible transparent electrodes presents a great opportunity to accelerate the mass deployment of high-efficiency hybrid silicon photovoltaics via simple and rapid soluble processes.
URI: http://dx.doi.org/10.1021/am302011u
ISSN: 1944-8244
DOI: 10.1021/am302011u
Volume: 4
Issue: 12
Begin Page: 6856
End Page: 6863
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