Record performance in intrinsic, impurity-free lateral diamond photoconductive semiconductor switches

IF 3.5 2区物理与天体物理 Q2 PHYSICS, APPLIED

Applied Physics Letters Pub Date : 2025-04-14 DOI:10.1063/5.0266565

Zhuoran Han, Jaekwon Lee, Anik Mazumder, Hubert Elly, Stephen Messing, Andrey Mironov, Can Bayram

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引用次数: 0

Abstract

Photoconductive semiconductor switches (PCSSs) are fabricated on type IIa diamond substrates with varying boron and nitrogen impurity levels (<1014–1016 cm−3). The photoresponse of lateral PCSS is reported over the incident laser wavelength range (212–240 nm), energy per pulse (5–65 μJ), and DC bias (−1.2 to +1.2 kV). The PCSS device with the lowest boron and nitrogen impurity concentration achieves the highest normalized responsivity of 9.1 × 10−8 A-cm/W-V, peak photocurrent of 8.0 A, and on/off ratio of 2.3 × 1011 at a DC bias of +1.2 kV with the potential for even higher currents at increased DC bias. All PCSS display fast rise times (<3 ns), limited by the laser's rise time. However, photoresponse measurements reveal that higher impurity levels reduce the photocurrent and decrease the on/off ratio. These results highlight the performance advantages of using low background concentration type IIa diamond substrates for PCSS fabrication and present a promising route toward advanced high-power, high-speed diamond-based switches.

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在具有不同硼和氮杂质含量（<1014-1016 cm-3）的 IIa 型金刚石衬底上制造了光电导半导体开关（PCSS）。报告了入射激光波长范围（212-240 nm）、每个脉冲能量（5-65 μJ）和直流偏压（-1.2 至 +1.2 kV）下横向 PCSS 的光响应。硼和氮杂质浓度最低的 PCSS 器件在直流偏压为 +1.2 kV 时实现了最高的归一化响应率（9.1 × 10-8 A-cm/W-V）、峰值光电流（8.0 A）和开/关比（2.3 × 1011），在直流偏压增加时还可能实现更大的电流。受激光上升时间的限制，所有 PCSS 的上升时间都很快（<3 ns）。然而，光响应测量显示，杂质含量越高，光电流越小，开/关比率越低。这些结果凸显了使用低本底浓度 IIa 型金刚石衬底制造 PCSS 的性能优势，并为实现先进的高功率、高速金刚石开关提供了一条前景广阔的途径。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Applied Physics Letters 物理-物理：应用

CiteScore

6.40

自引率

10.00%

发文量

1821

审稿时长

1.6 months

期刊介绍： Applied Physics Letters (APL) features concise, up-to-date reports on significant new findings in applied physics. Emphasizing rapid dissemination of key data and new physical insights, APL offers prompt publication of new experimental and theoretical papers reporting applications of physics phenomena to all branches of science, engineering, and modern technology. In addition to regular articles, the journal also publishes invited Fast Track, Perspectives, and in-depth Editorials which report on cutting-edge areas in applied physics. APL Perspectives are forward-looking invited letters which highlight recent developments or discoveries. Emphasis is placed on very recent developments, potentially disruptive technologies, open questions and possible solutions. They also include a mini-roadmap detailing where the community should direct efforts in order for the phenomena to be viable for application and the challenges associated with meeting that performance threshold. Perspectives are characterized by personal viewpoints and opinions of recognized experts in the field. Fast Track articles are invited original research articles that report results that are particularly novel and important or provide a significant advancement in an emerging field. Because of the urgency and scientific importance of the work, the peer review process is accelerated. If, during the review process, it becomes apparent that the paper does not meet the Fast Track criterion, it is returned to a normal track.