Journal
SOLAR ENERGY MATERIALS AND SOLAR CELLS
Volume 109, Issue -, Pages 142-147Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.solmat.2012.10.013
Keywords
Embedded Ag grid mesh; Nano-silver paste; Organic solar cells; Roll-to-roll imprint; Transparent conductive film
Funding
- Korea institute of Energy Technolgy Evaluation and Planning (KETEP)
- Korea Research Council Industrial Science and Technology, Republic of Korea
- NRL program of the National Research Foundation, Republic of Korea
- [20103060010010]
- [B551179-08-03-00]
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We report a development of a highly transparent conductive film (TCF) which is the first embedded metal grid of fine lines on a flexible substrate. The TCF reveals excellent electrical and optical performance as transparent conductive film with an extremely high sigma(DC)/sigma(OP) value of 237 due to 80.35% transmittance and 6.85 Omega/square sheet resistance. Furthermore, the extremely high performance is realized with new features of the TCFs: roll-to-roll printability on flexible substrates,' thermal imprinting of channels at 10 mu m widths, water-based nano-silver paste to fill the narrow channels, and doctor blade as a facile method to fill the paste into the channels. The TCF electrode is implemented to fabrication of an organic solar cell (OSC) which shows a power conversion efficiency of 1.40%. This is non-optimized yet but approaching that of an ITO-based OSC (1.70%). Thus, we demonstrate a printable TCF to replace the ITO films toward low-cost large area roll-to-roll fabrication of organic solar cells. (C) 2012 Elsevier B.V. All rights reserved.
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