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- W2057287076 abstract "GaN UV metal–semiconductor–metal photodetectors (MSM PDs) with an unactivated Mg-doped cap layer and sputtered indium tin oxide (ITO) were fabricated. Compared with conventional MSM PDs without a cap layer, it was found that we could achieve a significantly much smaller dark current, larger UV to visible rejection ratio, and larger normalized detectivity by inserting an unactivated Mg-doped GaN cap layer. The dark leakage current for the MSM PDs with an unactivated Mg-doped GaN cap layer was shown to be about ten orders of magnitude smaller than that for the conventional MSM PDs. Under a 0.5 V bias, the measured responsivity and UV-to-visible rejection ratio were 0.017 A/W and , respectively, for the MSM PDs with an unactivated Mg-doped GaN cap layer. This result could be attributed to the thicker and higher potential barrier and effective surface passivation after inserting this in situ grown cap layer. With a 1 V applied bias, it was also found that we could achieve a lower noise level and a higher normalized detectivity of by inserting an unactivated Mg-doped GaN cap layer into MSM PDs." @default.
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- W2057287076 date "2008-01-01" @default.
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- W2057287076 title "GaN MSM Photodetectors with an Unactivated Mg-Doped GaN Cap Layer and Sputtered ITO Electrodes" @default.
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- W2057287076 doi "https://doi.org/10.1149/1.2900102" @default.
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