Solar-blind UV photocathodes based on AlGaN heterostructures with a 300- to 330-nm spectral sensitivity threshold |
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Authors: | M R Ainbund A N Alekseev O V Alymov V N Jmerik L V Lapushkina A M Mizerov S V Ivanov A V Pashuk S I Petrov |
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Affiliation: | 1. ELECTRON Central Research Institute, St. Petersburg, 194223, Russia 2. Semiconductor Technologies and Equipment Company (SemiTEq), St. Petersburg, 194156, Russia 3. Ioffe Physical Technical Institute, Russian Academy of Sciences, St. Petersburg, 194021, Russia
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Abstract: | Solar-blind UV photodetectors based on photocathodes are among the important applications of heterostructures based on group III metal nitride semiconductors. Related investigations are most frequently devoted to photocathodes with p-GaN active regions characterized by a long-wavelength sensitivity threshold at 360 nm. Since the detected radiation is mostly concentrated in the spectral range below 240?C290 nm, corresponding displacement of the long-wavelength sensitivity threshold of photodetectors by using photocathodes with p-AlGaN active regions is a topical task. We present preliminary results on manufacturing photocathodes with a p-Al x Ga1 ? x N (x = 0.1 and 0.3) active region (possessing a long-wavelength sensitivity threshold at 330 and 300 nm, respectively). |
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