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- W2059346572 abstract "On (1100) surfaces of ZnO crystals photoconductivity has been observed at 77 K in the spectral range between 0.2 and 2.5 eV (band gap 3.4 eV). The photoconductivity was measured in ultrahigh vacuum. However, it is sensitive to the pretreatment of the surfaces with gases at room temperature. The spectra exhibit two characteristic bands which are interpreted in terms of an excitation of electrons from two sets of surface states at about 170 and 450 meV below the conduction band. Thus, photoconductivity can be used for spectroscopy of surface states. An (1100)-Oberflächen von ZnO-Kristallen wurde bei 77 K Photoleitung im Spektralbereich von 0,2 bis 2,5 eV beobachtet (Bandabstand 3,4 eV). Die Messungen erfolgten im Ultrahochvakuum. Dabei wird die Photoleitfähigkeit durch eine vorhergehende Gasbehandlung der Oberflächen bei Zimmertemperatur beeinflußt. Die Spektren zeigen zwei charakteristische Banden, die durch Anregung von Elektronen aus zwei Gruppen von Oberflächenzuständen bei Energien von etwa 170 und 450 meV unter dem Leitungsband erklärt werden. Die Photoleitung kann also zur Spektroskopie von Oberflächenzuständen dienen." @default.
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- W2059346572 date "1972-12-16" @default.
- W2059346572 modified "2023-09-26" @default.
- W2059346572 title "Photoconductivity from electronic surface states on prism surfaces of zinc oxide crystals" @default.
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- W2059346572 doi "https://doi.org/10.1002/pssa.2210140225" @default.
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