RF sputtered indium-tin-oxide as antireflective coating for GaAs solar cells |
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| Authors: | E. Aperathitis Z. Hatzopoulos M. Androulidaki V. Foukaraki A. Kondilis C.G. Scott D. Sands P. Panayotatos |
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| Affiliation: | aMicroelectronics Research Group, Institute of Electronic Structure and Laser, Foundation For Research and Technology - Hellas, P.O. Box 1527, Heraklion 71110, Crete, Greece;bDepartment of Applied Physics, Hull University, Hull HU67RX, United Kingdom;cDepartment of Electrical and Computer Engineering, Rutgers, The State University of New Jersey, P.O. Box 909, Pitcataway, NJ 08855-0909, USA |
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| Abstract: | Conductive and antireflective indium-tin-oxide (ITO) has been prepared by RF sputtering in Ar atmosphere, without introducing oxygen into the plasma and on room temperature substrates in order to be used as antireflective coating on GaAs solar cells. The electrical resistivity of the n-type, degenerate ITO films exhibited a reduction with deposition rate and an increase with total pressure, while it was independent of the film thickness in the range of 20 nm to 130 run. Further reduction of resistivity, up to 4 × 10−4 Ωcm, was obtained by annealing at 400°C. This is the lowest resistivity that has been reported for TTO films prepared under similar conditions. The transmittance of 90 nm thick ITO film was 85% and the reflectance of p/n GaAs solar cell was reduced from 35% to 2% after the ITO layer application. |
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| Keywords: | Antireflective coating Solar cell materials Thin films ITO Solar cells GaAs |
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