Electrode Preparation of Solar Blind UV Detector Based on Polycrystalline Diamond Films

CHEN Zi-yi; ZHANG Wei-liang; RONG Xi-ming; HAN Shun; ZENG Yu-xiang; CAO Pei-jiang; FANG Ming; LIU Wen-jun; ZHU De-liang; LYU You-ming

doi:10.37188/CJL.20220279

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Electrode Preparation of Solar Blind UV Detector Based on Polycrystalline Diamond Films

Device Fabrication and Physics | 更新时间：2023-02-13

- Electrode Preparation of Solar Blind UV Detector Based on Polycrystalline Diamond Films
  增强出版
- Chinese Journal of Luminescence Vol. 43, Issue 12, Pages: 1974-1982(2022)
- 作者机构：
  
  1.深圳大学材料学院，深圳市特种功能材料重点实验室，广东省功能材料界面工程研究中心，广东深圳　518055
- 作者简介：
- 基金信息：
  
  the National Natural Science Foundation of China(51872187;11774241;12074263;21805194);the Natural Science Foundation of Guangdong Province(2021A1515012013);the Fundamental Research Project of Shenzhen(JCYJ20180508163404043;JCYJ2018030507182248925)
- DOI：10.37188/CJL.20220279
  CLC：
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CHEN Zi-yi, ZHANG Wei-liang, RONG Xi-ming, et al. Electrode Preparation of Solar Blind UV Detector Based on Polycrystalline Diamond Films. [J]. Chinese Journal of Luminescence 43(12):1974-1982(2022)
DOI：

CHEN Zi-yi, ZHANG Wei-liang, RONG Xi-ming, et al. Electrode Preparation of Solar Blind UV Detector Based on Polycrystalline Diamond Films. [J]. Chinese Journal of Luminescence 43(12):1974-1982(2022) DOI： 10.37188/CJL.20220279.

摘要

通过在直流等离子体喷射化学气相沉积（DC⁃PJCVD）法生长的多晶金刚石薄膜上制备Au叉指电极，构建了金属⁃半导体⁃金属（MSM）结构的日盲紫外探测器件。研究了不同光刻工艺对制备的金刚石探测器件性能的影响。结果表明，lift⁃off光刻工艺所制备的器件性能明显优于湿法光刻工艺器件，其,I,light,提高了4.4倍，光暗电流比提高了6.8倍，在25 V电压下响应度提高了9倍，达到了0.15 A/W。在此基础上通过lift⁃off光刻工艺制备了Au、Ti、Ti/Au和Ag四种不同金属的叉指电极，对比了不同金属电极制备的金刚石紫外探测器件的性能差异。其中Ag电极由于存在势垒隧穿效应引起的增益，在四种电极中性能表现最佳，在25 V偏压下其,I,light,高达0.21 μA，响应度提升到0.78 A/W，性能与已有报道的器件性能相当。与普通Au电极制备的器件相比，其光电流提高了5.2倍，光暗电流比提升了7倍，响应度提高了5.2倍。

Abstract

A metal-semiconductor-metal（MSM） structure solar blind UV detector was constructed by preparing interdigital Au electrode on polycrystalline diamond films grown by DC plasma jet chemical vapor deposition （DC-PJCVD）. The effects of different photolithography processes on the performance of the diamond detector were studied， and the results show that the performance of the device prepared by lift-off photolithography is significantly better than that prepared by wet procedure photolithography. The photocurrent of the device is increased by 4.4 times， the light-dark current ratio is increased by 6.8 times， and the responsivity is increased by 9 times to 0.15 A/W at 25 V. On this basis， the interdigitated electrodes of Au， Ti， Ti/Au and Ag were prepared by lift-off photolithography. The performance differences of diamond UV detectors prepared by different metal electrodes were compared. The Ag electrode has the best performance among the four electrodes due to the gain caused by the barrier tunneling effect. At 25 V bias， the light current is 0.21 μA， and responsivity increases to 0.78 A/W. Compared with common Au electrode， the photocurrent， light-dark current ratio and responsivity are increased by 5.2 times， 7 times and 5.2 times respectively.

关键词

金刚石薄膜lift-off光刻工艺Ag电极日盲紫外探测器

Keywords

diamond filmslift-off photolithographyAg electrodesolar blind ultraviolet detector

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Shenzhen Key Laboratory of Special Functional Materials， Guangdong Research Center for Interfacial Engineering of Functional Materials， College of Materials Science and Engineering， Shenzhen University

Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences

Research Institute of Electric Communication, Tohoku University, Sendai, Japan

Department of Physics, University of Science and Technology of China, Hefei 230026

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