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APL | 青岛大学单福凯教授团队:通过引入Al₂O₃电荷俘获层增强IGZO突触晶体管的长期记忆特性

  • 2026-02-06 01:16:47
APL | 青岛大学单福凯教授团队:通过引入Al₂O₃电荷俘获层增强IGZO突触晶体管的长期记忆特性

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近日,青岛大学单福凯教授团队在Applied Physics Letters上发表了题为“Enhancement of long-term memory of IGZO synaptic transistors by the introduction of Al2O3 charge trapping layer”的研究论文。

受大脑神经突触启发的神经形态计算被广泛认为是克服传统冯·诺依曼架构局限性的有前景的解决方案。作为神经形态系统的核心组件,人工突触器件在自适应学习方面展现出巨大潜力。由于具有可控的沟道电导和CMOS兼容性,固态电解质栅突触晶体管(EGSTs)作为下一代神经形态器件引起了广泛关注。然而,现有的大多数EGSTs由于离子的快速自扩散行为,难以维持稳定的沟道电导状态,严重制约了其长期可塑性(LTP)表现。

为了解决这一问题,本工作提出将电荷俘获(CT)层引入栅介质的策略,制备了以铟镓锌氧化物(IGZO)为沟道层、Al2O3为电荷俘获层、ZrO2为固态电解质层的突触晶体管。基于Al2O3层中被俘获的正电荷的俘获/去俘获行为,可以有效调控氢离子的迁移,从而显著改善突触晶体管的LTP特性。通过调节突触前脉冲方案,成功模拟了典型的突触行为,包括兴奋性突触后电流(EPSC)、双脉冲易化(PPF)以及从短期记忆(STM)到长期记忆(LTM)的转变。基于突触晶体管中沟道的电导调制特性,构建了用于模式识别的人工神经网络,获得了95.4%的高识别准确率。这项工作展示了一种增强突触晶体管LTP特性的有效策略。

图1 (a) 基于Al2O3/ZrO2双层介电层的IGZO突触晶体管结构示意图;(b) ZrO2固态电解质中氢离子的传输机制;(c) ZrO2固态电解质的电容-频率特性。

图2. (a) 无Al2O3层和 (b) 有Al2O3层的IGZO突触晶体管在不同VGS扫描范围下的转移特性曲;(c) 有Al2O3层的IGZO突触晶体管在电荷俘获和去俘获过程中的能带示意图。

图3. (a) 不同VGS扫描范围下带Al2O3层的突触晶体管的栅极漏电流;(b) 脉冲幅度从1V到8V时器件的EPSC响应;(c) 脉冲宽度从5ms到100ms时的EPSC响应;(d) PPF对两个连续脉冲间隔的依赖性。

图4 (a) 不同数量脉冲触发的器件由STM到LTM的转变;(b) 无Al2O3层和 (c) 有Al2O3层的突触晶体管的电导调制特性;(d) 100组增强-抑制行为的稳定性测试。

图5 (a) 用于模式识别任务的人工神经网络框架;(b) 小图像任务和 (c) 大图像任务的模式识别准确率。

团队介绍

单福凯,博士,二级教授,博士生导师。迄今已在SCI期刊发表学术论文160余篇,其中以第一作者或通讯作者署名140余篇,累计被引8100余次,单篇最高被引400余次,H-因子49。多篇第一/通信作者文章发表于《Advanced Materials》、《Advanced Functional Materials》、《Applied Physics Letters》、《IEEE Electron Device Letters》等国际顶尖期刊;近三年在APL上发表文章10余篇,并多次被期刊选为Editor's picks和Featured Articles。主持国家重点研发计划子课题、国家自然科学基金面上项目、军委科技委项目、山东省自然基金及多项企业横向课题。团队主要研究方向包括宽禁带半导体薄膜材料、高κ介电层与半导体器件的集成(薄膜晶体管、光电神经形态器件、光电探测器等)。

王聿晖,青岛大学电子信息学院硕士研究生。

苗广潭,青岛大学物理科学学院博士研究生。

文章信息

Enhancement of long-term memory of IGZO synaptic transistors by the introduction of an Al₂O₃ charge trapping layer

Yuhui Wang; Guangtan Miao; Zezhong Yin; Ranran Ci; Guoxia Liu; Fukai Shan

Appl. Phys. Lett. 127, 013501 (2025)

https://doi.org/10.1063/5.0282482

扫描二维码 查看原文

期刊介绍

Applied Physics Letters以简明扼要的最新报告为特色,介绍了应用物理学的重大新发现。APL强调关键数据和新的物理学见解的快速传播,及时发表新实验和理论论文,报告物理现象在科学,工程和现代技术的所有分支中的应用。

关于AIP出版社

美国物理联合会出版社(AIP 出版社)是美国物理联合会(AIP)旗下的非营利独资出版社。AIP 出版社的使命是在物理和相关科学领域开展学术出版活动,以支持AIP的慈善、科学和教育目标。我们也代表出版合作伙伴进行出版活动,以帮助其积极推进自身的使命。

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  1. CONNECT:[ UseTime:0.000465s ] mysql:host=127.0.0.1;port=3306;dbname=g460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000863s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000275s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000283s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000463s ]
  6. SELECT * FROM `set` [ RunTime:0.000175s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000484s ]
  8. SELECT * FROM `article` WHERE `id` = 457985 LIMIT 1 [ RunTime:0.002799s ]
  9. UPDATE `article` SET `lasttime` = 1770606667 WHERE `id` = 457985 [ RunTime:0.000642s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 66 LIMIT 1 [ RunTime:0.000266s ]
  11. SELECT * FROM `article` WHERE `id` < 457985 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000438s ]
  12. SELECT * FROM `article` WHERE `id` > 457985 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.003722s ]
  13. SELECT * FROM `article` WHERE `id` < 457985 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.010588s ]
  14. SELECT * FROM `article` WHERE `id` < 457985 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.002390s ]
  15. SELECT * FROM `article` WHERE `id` < 457985 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.002402s ]
0.094752s