欢迎访问《人工晶体学报》官方网站,今天是

人工晶体学报 ›› 2026, Vol. 55 ›› Issue (5): 697-705.DOI: 10.16553/j.cnki.issn1000-985x.2025.0264

• 研究论文 • 上一篇    下一篇

氧分压对光学浮区法生长 β -Ga2O3单晶的影响

李新朋1(), 李山1(), 冯淦荣1, 祁颂1, 季学强1, 唐为华1, 夏长泰2()   

  1. 1.南京邮电大学集成电路科学与工程学院,南京 210023
    2.中国科学院上海光学精密机械研究所,上海 201800
  • 收稿日期:2025-12-30 出版日期:2026-05-20 发布日期:2026-06-09
  • 通信作者: 李山,博士,副教授。E-mail:shanli@njupt.edu.cn
    夏长泰,博士,研究员。E-mail:xia_ct@siom.ac.cn
  • 作者简介:李新朋(2001—),男,河南省人,硕士研究生。E-mail:1023223315@njupt.edu.cn
  • 基金资助:
    江苏省前沿技术研发计划(BF2025078);国家自然科学基金青年科学基金项目(62305171);江苏省自然科学基金青年基金(BK20230361)

Effect of Oxygen Partial Pressure on β -Ga2O3 Single Crystals Grown by Optical Floating Zone Method

LI Xinpeng1(), LI Shan1(), FENG Ganrong1, QI Song1, JI Xueqiang1, TANG Weihua1, XIA Changtai2()   

  1. 1.School of Integrated Circuit Science and Engineering,Nanjing University of Posts and Telecommunications,Nanjing 210023,China
    2.Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Shanghai 201800,China
  • Received:2025-12-30 Online:2026-05-20 Published:2026-06-09

摘要: 第四代半导体氧化镓(Ga2O3)因独特的物性和易获得大尺寸单晶的优势,在深紫外光电探测和高能效功率电子领域具有重要应用。氧空位作为氧化物半导体常见的本征点缺陷之一,是影响Ga2O3材料质量和器件性能的核心因素。实现Ga2O3单晶中氧空位的调控具有重要的现实意义。本研究利用光学浮区法无容器、高纯度的生长优势,构建了精确可控的氩/氧混合气氛场,探究了氧分压参数对β-Ga2O3单晶氧空位缺陷浓度的作用效果。实验结果表明,随着氩/氧混合气氛中氧含量增大,β-Ga2O3单晶的光透过率明显改善,晶格有序度显著提升,PL谱中缺陷相关的发光强度显著降低。通过X射线光电子能谱O 1s阴离子和Ga 3d阳离子分析共同证实,β-Ga2O3单晶中的氧空位缺陷浓度随着氧分压的增大而降低。本文开展的光学浮区法氧分压对β-Ga2O3单晶氧空位缺陷影响研究,可为高质量氧化物单晶生长提供技术方案参考。

关键词: 氧化镓; 光学浮区法; 氧空位; 氧分压; 单晶; X射线光电子能谱

Abstract: Gallium oxide (Ga2O3) is a representative fourth-generation semiconductor with unique physical properties and the advantage of readily available large-area single crystals. These characteristics make Ga2O3 highly attractive for deep-ultraviolet photodetection and high-efficiency power electronic applications. Oxygen vacancies are among the most common intrinsic point defects in oxide semiconductors and play a crucial role in determining the material quality and device performance of Ga2O3. Therefore, effective control of oxygen vacancies in Ga2O3 single crystals is of significant practical importance. In this work,β-Ga2O3 single crystals were grown by optical floating zone method, which enables crucible-free growth and high material purity. A precisely controlled Ar/O2 mixed atmosphere was employed to systematically investigate the effect of oxygen partial pressure on oxygen vacancy defect concentration inβ-Ga2O3 single crystals. With increasing oxygen content in the growth atmosphere, the optical transmittance ofβ-Ga2O3 single crystals is markedly enhanced, and the lattice ordering is significantly improved. Meanwhile, the defect-related photoluminescence emission is strongly suppressed. X-ray photoelectron spectroscopy analyses of the O 1s anion and Ga 3d cation states consistently demonstrate that the oxygen vancancy defect concentration decreases with increasing oxygen partial pressure. These results indicate that oxygen partial pressure is an effective parameter for regulating oxygen vacancy defect concentration inβ-Ga2O3 single crystals. This study provides practical guidance for the growth of high-quality oxide semiconductor single crystals.

Key words: gallium oxide; optical floating zone method; oxygen vacancy; oxygen partial pressure; single crystal; X-ray photoelectron spectroscopy

中图分类号: