Polycrystalline Zn3P2 Schottky photodiode: Vacuum surface effects

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Thin-film polycrystalline Mg/Zn3P2 Schottky photodiodes were fabricated. Their optical and electrical properties under 1 atm air and 10-5 Torr vacuum conditions were measured. It was observed that the spectral quantum efficiency improved under vacuum. These changes were a result of surface effects. Surface ionic charge at the bulk-surface interface and at the grain boundary induces a surface depletion region which is affected by vacuum operation, hence affecting the photodiode properties.
Original languageEnglish
Pages (from-to)2808-2810
JournalJournal of Applied Physics
Issue number4
StatePublished - 1 Aug 1995
Externally publishedYes


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