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材料导报  2025, Vol. 39 Issue (3): 24040002-7    https://doi.org/10.11896/cldb.24040002
  无机非金属及其复合材料 |
基于Cs4PbBr6纳米晶的超高灵敏度电阻型湿敏传感器
郭洪兵1, 刘曰利1,2,*
1 武汉理工大学材料科学与工程学院,硅酸盐建筑材料国家重点实验室,武汉 430070
2 武汉理工大学三亚科教创新园,海南 三亚 572024
Ultra-sensitive Resistive Humidity Sensor Based on Cs4PbBr6 Nanocrystals
GUO Hongbing1, LIU Yueli1,2,*
1 State Key Laboratory of Silicate Materials for Architectures, School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China
2 Sanya Science and Education Innovation Park, Wuhan University of Technology, Sanya 572024, Hainan, China
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摘要 采用改进的配体辅助共沉淀法合成Cs4PbBr6纳米晶并组装基于Cs4PbBr6纳米晶的湿敏传感器,对其物相结构、微观形貌、能带结构、光学性质、表面状态进行表征,并对其湿敏性能及湿敏机理进行测试。研究结果表明,Cs4PbBr6纳米晶含有丰富的溴空位缺陷且有着良好的亲水性。Cs4PbBr6纳米晶湿敏传感器在11%~98%的湿度范围内具有2.32×105的超高响应值、5.14%的湿滞、优秀的线性度、14 s/10 s的快速响应恢复时间、优异的长期稳定性和气体选择性,能够胜任无接触式开关和呼吸检测的工作。Cs4PbBr6纳米晶优秀的湿敏性能归因于材料中的溴空位缺陷作为活性位点促进水分子的吸附和解离。
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郭洪兵
刘曰利
关键词:  Cs4PbBr6纳米晶  湿敏传感器  溴空位缺陷  超高灵敏度    
Abstract: In this work, Cs4PbBr6 nanocrystals were synthesized via a modified ligand-assisted reprecipitation method and a humidity sensor based on Cs4PbBr6 nanocrystals was assembled. Phase structure, micromorphology, energy band structure, optical properties and surface state were characterized. Humidity sensing performance and humidity sensing mechanism were also tested. Research results show that Cs4PbBr6 nanocrystals contain abundant bromine vacancy defects and have good hydrophilicity. The Cs4PbBr6 nanocrystals humidity sensor has an ultra-high response value of 2.32×105, a hysteresis of 5.14%, excellent linearity, a short response/recovery time of 14 s/10 s, excellent long-term stability and gas selectivity in the humidity range of 11%—98%. It is capable for non-contact switch and breath detection. The excellent humidity sensing properties of Cs4PbBr6 nanocrystals are attributed to the bromine vacancy defects in the material, which serve as active sites to promote the adsorption and dissociation of water molecules.
Key words:  Cs4PbBr6 nanocrystal    humidity sensor    bromine vacancy defect    ultra-high sensitivity
出版日期:  2025-02-10      发布日期:  2025-02-05
ZTFLH:  TB34  
基金资助: 国家自然科学基金(12174298);三亚市科技创新专项项目(2022KJCX85)
通讯作者:  *刘曰利,博士,武汉理工大学硅酸盐建筑材料国家重点实验室研究员、博士研究生导师。目前主要从事气湿敏传感器、光催化、太阳能电池、空气取水、激光焊接等方面的研究。lylliuwhut@whut.edu.cn   
作者简介:  郭洪兵,现为武汉理工大学材料科学与工程学院硕士研究生,在刘曰利教授的指导下进行研究。目前主要研究领域为湿敏传感器。
引用本文:    
郭洪兵, 刘曰利. 基于Cs4PbBr6纳米晶的超高灵敏度电阻型湿敏传感器[J]. 材料导报, 2025, 39(3): 24040002-7.
GUO Hongbing, LIU Yueli. Ultra-sensitive Resistive Humidity Sensor Based on Cs4PbBr6 Nanocrystals. Materials Reports, 2025, 39(3): 24040002-7.
链接本文:  
http://www.mater-rep.com/CN/10.11896/cldb.24040002  或          http://www.mater-rep.com/CN/Y2025/V39/I3/24040002
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