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Title: Analysis of an anti-reflecting nanowire transparent electrode for solar cells

Authors:
; ;
Publication Date:
Research Org.:
Energy Frontier Research Centers (EFRC) (United States). Center on Nanostructuring for Efficient Energy Conversion (CNEEC)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1397194
DOE Contract Number:
SC0001060
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 121; Journal Issue: 11; Related Information: CNEEC partners with Stanford University (lead); Carnegie Institution at Stanford; Technical University of Denmark
Country of Publication:
United States
Language:
English

Citation Formats

Zhao, Zhexin, Wang, Ken Xingze, and Fan, Shanhui. Analysis of an anti-reflecting nanowire transparent electrode for solar cells. United States: N. p., 2017. Web. doi:10.1063/1.4978769.
Zhao, Zhexin, Wang, Ken Xingze, & Fan, Shanhui. Analysis of an anti-reflecting nanowire transparent electrode for solar cells. United States. doi:10.1063/1.4978769.
Zhao, Zhexin, Wang, Ken Xingze, and Fan, Shanhui. Tue . "Analysis of an anti-reflecting nanowire transparent electrode for solar cells". United States. doi:10.1063/1.4978769.
@article{osti_1397194,
title = {Analysis of an anti-reflecting nanowire transparent electrode for solar cells},
author = {Zhao, Zhexin and Wang, Ken Xingze and Fan, Shanhui},
abstractNote = {},
doi = {10.1063/1.4978769},
journal = {Journal of Applied Physics},
number = 11,
volume = 121,
place = {United States},
year = {Tue Mar 21 00:00:00 EDT 2017},
month = {Tue Mar 21 00:00:00 EDT 2017}
}
  • ARC grade highly transparent unhydrogenated diamond-like carbon (DLC) films were produced, directly from a-C target, using RF magnetron sputtering deposition technique, for optoelectronic applications. Optical band gap, transmittance, reflectance, sp{sup 3} fraction, I{sub D}/I{sub G}, density, and refractive index of the films have been estimated with the help of optical tools like Uv-vis spectrophotometer, ellipsometer and micro-Raman. Optimum ARC-qualities have been identified in low-temperature grown DLC films at an Ar pressure of 4 mTorr in the reactor, accomplishing its key requirements for use in silicon solar cells.
  • Surface plasmon enhanced photo-current and power conversion efficiency of organic solar cells using periodic Ag nanowires as transparent electrodes are reported, as compared to the device with conventional ITO electrodes. External quantum efficiencies are enhanced about 2.5 fold around the peak solar spectrum wavelength of 560 nm, resulting in 35% overall increase in power conversion efficiency than the ITO control device under normal unpolarized light.
  • We review our recent progress toward realizing future low-cost, high-efficiency, and scalable organic solar cells (OSCs). First, we show that the transparent electrodes based on metallic nanostructure is a strong candidate as a replacement of conventional indium tin oxide (ITO) electrode due to their superior properties, such as high optical transparency, good electrical conductivity, and mechanical flexibility, and the versatility that these properties can be adjusted independently by changing the linewidth and thickness of the metal grid structure. Furthermore, we exploited the unique optical properties due to the excitation of surface plasmon resonance by the metallic nanogratings to enhance themore » light absorption of organic semiconductors, and demonstrated enhanced power conversion efficiency than devices made using ITO electrode. In addition, we also investigated a new device fabrication process with a focus on the photoactive layer formation, which produces the most optimum bulk-heterojunction morphology compared with conventional annealing-based methods. Finally, we successfully demonstrated that these approaches are scalable to large-area and high-speed roll-to-roll processes. We believe that the works highlighted in this paper represent one step forward to realizing low-cost, high-efficiency, and large-area OSCs.« less