Frequency dependence of junction capacitance of BPW34 and BPW41 p-i-n photodiodes |
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Authors: | Habibe Bayhan ?adan Özden |
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Institution: | (1) Physics Department, Faculty of Art and Science, University of Muǧla, 48000 Muǧla, Turkey |
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Abstract: | This article investigates the frequency dependence of small-signal capacitance of silicon BPW34 and BPW41 (Vishay) p-i-n photodiodes.
We show that the capacitance-frequency characteristics of these photodiodes are well-described by the Schibli and Milnes model.
The activation energy and the concentration of the dominant trap levels detected in BPW34 and BPW41 are 280–330 meV and 1.1×1012−1.2×1012 cm−3, respectively. According to the high-frequency C-V measurements, the impurity concentrations are determined to be about 5.3×1012 and 1.9×1013 cm−3 in BPW41 and BPW34, respectively using the method of ΔV/Δ(C
−2) vs. C.
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Keywords: | BPW34 BPW41 p-i-n capacitance frequency dependence |
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