Characteristics of flexible indium tin oxide electrode grown by continuous roll-to-roll sputtering process for flexible organic solar cells
| Autor: | Jin-A Jeong, Han-Ki Kim, Jong-Kuk Kim, Dong-Yu Kim, Kwang-Hyuk Choi, Seok-Soon Kim, Seok-In Na, Do-Guen Kim, Jae-Wook Kang |
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| Rok vydání: | 2009 |
| Předmět: |
Materials science
Organic solar cell Renewable Energy Sustainability and the Environment business.industry Substrate (electronics) Surfaces Coatings and Films Electronic Optical and Magnetic Materials Roll-to-roll processing Indium tin oxide chemistry.chemical_compound Optics chemistry Sputtering Electrode Polyethylene terephthalate Optoelectronics business Sheet resistance |
| Zdroj: | Solar Energy Materials and Solar Cells. 93:1248-1255 |
| ISSN: | 0927-0248 |
| DOI: | 10.1016/j.solmat.2009.01.015 |
| Popis: | The preparation and characteristics of flexible indium tin oxide (ITO) electrodes grown on polyethylene terephthalate (PET) substrates using a specially designed roll-to-roll sputtering system for use in flexible organic solar cells are described. It was found that both electrical and optical properties of the flexible ITO electrode were critically dependent on the Ar/O2 flow ratio in the continuous roll-to-roll sputter process. In spite of the low substrate temperature (o501C), we can obtain the flexible ITO electrode with a sheet resistance of 47.4O/square and an average optical transmittance of 83.46% in the green region of 500–550 nm wavelength. Both X-ray diffraction and field emission scanning electron microscopy analysis results showed that all flexible ITO electrodes grown on the PET substrate were amorphous with a very smooth and featureless surface, regardless of the Ar/O2 flow ratio due to the low substrate temperature, which is maintained by a cooling drum. In addition, the flexible ITO electrode grown on the Ar ion-beam-treated PET substrates showed more stable mechanical properties than the flexible ITO electrode grown on the wet-cleaned PET substrates, due to an increased adhesion between the flexible ITO and the PET substrates. Furthermore, the flexible organic solar cell fabricated on the rollto-roll sputter-grown flexible ITO electrode at an optimized condition exhibited a power conversion efficiency of 1.88%. This indicates that the roll-to-roll sputtering technique is a promising continuous |
| Databáze: | OpenAIRE |
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