Extremely High Quantum Photoyield from Cesiated Polycrystalline Diamond Films

An extremely high quantum photoyield, as high as 70% at the photon energy of 10 eV, was observed from cesiated polycrystalline diamond films. The threshold photon energy of 5.5 eV or less was observed. The results suggest that the cesiated polycrystalline diamond surface has a true negative electron...

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Bibliographic Details
Published inJapanese Journal of Applied Physics Vol. 37; no. 12B; p. L1531
Main Authors Niigaki, Minoru, Hirohata, Toru, Mochizuki, Tomoko, Uchiyama, Shoichi, Kan, Hirofumi, Hiruma, Teruo
Format Journal Article
LanguageEnglish
Published 15.12.1998
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Summary:An extremely high quantum photoyield, as high as 70% at the photon energy of 10 eV, was observed from cesiated polycrystalline diamond films. The threshold photon energy of 5.5 eV or less was observed. The results suggest that the cesiated polycrystalline diamond surface has a true negative electron affinity. In contrast, a quantum photoyield of 17% at the photon energy of 10 eV was observed for a hydrogenated polycrystalline diamond film. The threshold photon energy of 5.5 eV or less was also observed, as in the cesiated one. It seems that the hydrogenated polycrystalline diamond surface has an effective negative electron affinity.
ISSN:0021-4922
1347-4065
DOI:10.1143/JJAP.37.L1531