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首页> 外文期刊>Applied Physics Letters >High gain, large area, and solar blind avalanche photodiodes based on Al-rich AlGaN grown on AIN substrates
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High gain, large area, and solar blind avalanche photodiodes based on Al-rich AlGaN grown on AIN substrates

机译：基于AIN衬底上生长的富含Al的AlGaN的高增益，大面积和太阳盲雪崩光电二极管

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摘要

We demonstrate large area (25 000 μm~2) Al-rich AlGaN-based avalanche photodiodes (APDs) grown on single crystal AIN substrates operating with differential (the difference in photocurrent and dark current) signal gain of 100 000 at 90 pW (<1 μW cm~(-2)) illumination with very low dark currents <0.1 pA at room temperature under ambient light. The high gain in large area AlGaN APDs is attributed to a high breakdown voltage at 340 V, corresponding to very high breakdown fields ～9 MV cm~(-1) as a consequence of low threading and screw dislocation densities < 10~3cm~(-2). The maximum charge collection efficiency of 30% was determined at 255 nm, corresponding to the bandgap of Al_(0.65)_Ga_(0.35)N, with a response of 0.06 A/W. No response was detected for λ > 280 nm, establishing solar blindness of the device.
机译：我们展示了在单晶AIN基板上生长的大面积（25,000μm〜2）富AlGaN基雪崩光电二极管（APD），在90 pW时（信号电流和暗电流的差异）信号增益为100000（< 1μWcm〜（-2））照明，在室温和环境光下，非常低的暗电流<0.1 pA。大面积AlGaN APD的高增益归因于340 V的高击穿电压，这对应于由于低螺纹和螺钉位错密度<10〜3cm〜（）而导致的非常高的击穿场〜9 MV cm〜（-1）。 -2）。在255 nm处确定30％的最大电荷收集效率，对应于Al_（0.65）_Ga_（0.35）N的带隙，响应为0.06 A / W。对于λ> 280 nm未检测到响应，从而确定了设备的日盲性。

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    《Applied Physics Letters》 |2020年第8期|081101.1-081101.5|共5页
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    Adroit Materials Inc. 2054 Kildaire Farm Rd. Cary North Carolina 27518 USA;

    Department of Materials Science and Engineering North Carolina State University Raleigh North Carolina 27695-7919 USA;

    Department of Electrical and Computer Engineering North Carolina State University Raleigh North Carolina 27695-7919 USA;

    Adroit Materials Inc. 2054 Kildaire Farm Rd. Cary North Carolina 27518 USA Department of Materials Science and Engineering North Carolina State University Raleigh North Carolina 27695-7919 USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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