Shijie Pan, Shiwei Feng, Xuan Li, Zixuan Feng, Xiaozhuang Lu, Kun Bai, Yamin Zhang
{"title":"Effects of 1 MeV electron radiation on the AlGaN/GaN high electron mobility transistors","authors":"Shijie Pan, Shiwei Feng, Xuan Li, Zixuan Feng, Xiaozhuang Lu, Kun Bai, Yamin Zhang","doi":"10.1088/1674-4926/24020020","DOIUrl":null,"url":null,"abstract":"In this study, the effects of 1 MeV electron radiation on the D-mode GaN-based high electron mobility transistors (HEMTs) were investigated after different radiation doses. The changes in electrical properties of the device were obtained, and the related physical mechanisms were analyzed. It indicated that under the radiation dose of 5 × 10<sup>14</sup> cm<sup>−2</sup>, the channel current cannot be completely pinched off even if the negative gate voltage was lower than the threshold voltage, and the gate leakage current increased significantly. The emission microscopy and scanning electron microscopy were used to determine the damage location. Besides, the radiation dose was adjusted ranging from 5 × 10<sup>12</sup> to 1 × 10<sup>14</sup> cm<sup>−2</sup>, and we noticed that the drain−source current increased and the threshold voltage presented slightly negative shift. By calculations, it suggested that the carrier density and electron mobility gradually increased. It provided a reference for the development of device radiation reinforcement technology.","PeriodicalId":17038,"journal":{"name":"Journal of Semiconductors","volume":null,"pages":null},"PeriodicalIF":4.8000,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Semiconductors","FirstCategoryId":"101","ListUrlMain":"https://doi.org/10.1088/1674-4926/24020020","RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"PHYSICS, CONDENSED MATTER","Score":null,"Total":0}
引用次数: 0
Abstract
In this study, the effects of 1 MeV electron radiation on the D-mode GaN-based high electron mobility transistors (HEMTs) were investigated after different radiation doses. The changes in electrical properties of the device were obtained, and the related physical mechanisms were analyzed. It indicated that under the radiation dose of 5 × 1014 cm−2, the channel current cannot be completely pinched off even if the negative gate voltage was lower than the threshold voltage, and the gate leakage current increased significantly. The emission microscopy and scanning electron microscopy were used to determine the damage location. Besides, the radiation dose was adjusted ranging from 5 × 1012 to 1 × 1014 cm−2, and we noticed that the drain−source current increased and the threshold voltage presented slightly negative shift. By calculations, it suggested that the carrier density and electron mobility gradually increased. It provided a reference for the development of device radiation reinforcement technology.