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Kelvin probe and ul...
Kelvin probe and ultraviolet photoemission measurements of indium tin oxide work function: : a comparison
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- Kim, J.S. (författare)
- Cavendish Laboratory, Department of Physics, University of Cambridge,,Cavendish Laboratory, Dept. Phys., Univ. Cambridge, M., Cambridge, United Kingdom
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- Lägel, B. (författare)
- Lägel, B., Department of Physics, Robert Gordon University, Aberdeen, United Kingdom
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- Moons, Ellen (författare)
- Cavendish Laboratory, Department of Physics, University of Cambridge,Cavendish Laboratory, Dept. Phys., Univ. Cambridge, M., Cambridge, United Kingdom
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Johansson, N. (författare)
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- Baikie, I. (författare)
- Department of Physics, Robert Gordon University, Aberdeen, United Kingdom
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- Salaneck, William R (författare)
- Linköpings universitet,Tekniska högskolan,Ytors Fysik och Kemi,Department of Physics, University of Linköping, SE-518 83 Linköping
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- Friend, R.H. (författare)
- Cavendish Laboratory, Department of Physics, University of Cambridge,Cavendish Laboratory, Dept. Phys., Univ. Cambridge, M., Cambridge, United Kingdom
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- Cacialli, F. (författare)
- Cavendish Laboratory, Department of Physics, University of Cambridge,Cavendish Laboratory, Dept. Phys., Univ. Cambridge, M., Cambridge, United Kingdom
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Cavendish Laboratory, Department of Physics, University of Cambridge, Cavendish Laboratory, Dept Phys., Univ. Cambridge, M., Cambridge, United Kingdom (creator_code:org_t)
- 2000
- 2000
- Engelska.
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Ingår i: Synthetic metals. - 0379-6779 .- 1879-3290. ; 111-112, s. 311-314
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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https://urn.kb.se/re...
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Abstract
Ämnesord
Stäng
- We report a comparison of the work functions of thin films of indium tin oxide (ITO), carried out by means of ultraviolet photoelectron spectroscopy (UPS) and by measurements of the contact potential difference with respect to a gold reference electrode (Kelvin probe (KP) method). We investigated commercially available ITOs both "as-received", and after certain surface treatments, such as oxygen plasma. First, we find measurable discrepancies between KP values measured with three different instruments, and between the KP and the UPS values. Secondly, and unexpectedly, we find that the KP, although more sensitive than UPS, does not detect certain differences between ITOs with different surface treatments. We discuss the results in view of the different environments in which the measurements are carried out (UHV for the UPS and air/Ar for the Kelvin method), of the effects which may be induced by the high-energy photon irradiation in the UPS measurement, and of the stability of the gold probe work function in gas ambient. We conclude that UPS is better-suited for absolute work function determination, although KP remains a convenient and inexpensive tool for fast screening of contact potential differences. (C) 2000 Elsevier Science S.A. All rights reserved.
Ämnesord
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
Nyckelord
- LIGHT-EMITTING-DIODES; ANODES
- Physics
- Fysik
- TECHNOLOGY
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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