Abstract
The authors report on the high current density n-ZnO/p-Si heterojunction diode that has been fabricated by atomic layer deposition (ALD) of 70 nm thin ZnO on a p-Si substrate. While the diode was formed at four different ALD temperatures of 80, 100, 150 and 200 °C, the 100 °C processed diode showed an optimal behaviour of an on-off ratio over 3.3 × 103 and a high forward current density, ∼300A cm-2 at 3V. Although the highest film conductance appeared from the 200 °C deposited ZnO layer, nanometre thin SiOx was also revealed at the ZnO/p-Si interface; it might cause a high reverse leakage current level. Our high current density diode also demonstrates a fast switching performance without any reverse recovery delay, which is often observed at a usual Si p-n diode.
Original language | English |
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Article number | 345101 |
Journal | Journal of Physics D: Applied Physics |
Volume | 43 |
Issue number | 34 |
DOIs | |
Publication status | Published - 2010 Sep 1 |
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Acoustics and Ultrasonics
- Surfaces, Coatings and Films