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High-performance flexible and broadband photodetectors based on PbS quantum dots/ZnO nanoparticles heterostructure

基于硫化铅量子点和氧化锌纳米颗粒异质结的高性能柔性和宽波段光电探测器

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Abstract

Flexible and broadband photodetectors have drawn extensive attention due to their potential application in foldable displays, optical communications, environmental monitoring, etc. In this work, a flexible photodetector based on the crystalline PbS quantum dots (QDs)/ZnO nanoparticles (NPs) heterostructure was proposed. The photodetector exhibits a broadband response from ultraviolet-visible (UV-Vis) to near infrared detector (NIR) range with a remarkable current on/off ratio of 7.08×103 under 375 nm light illumination. Compared with pure ZnO NPs, the heterostructure photodetector shows the three orders of magnitude higher responsivity in Vis and NIR range, and maintains its performance in the UV range simultaneously. The photodetector demonstrates a high responsivity and detectivity of 4.54 A W−1 and 3.98×1012 Jones. In addition, the flexible photodetectors exhibit excellent durability and stability even after hundreds of times bending. This work paves a promising way for constructing next-generation high-performance flexible and broadband optoelectronic devices.

摘要

柔性和宽波段的光电探测器在可折叠显示、光通信和环境监测等方面有潜在的应用, 因而引起广泛的关注. 本文基于硫化铅量子点和氧化锌纳米颗粒异质结制备了柔性光电探测器. 该器件表现出从紫外光到近红外光的宽波段光电响应性能. 在375 nm紫外光照射下,该器件的电流开关比高达7.08×103. 与单纯的氧化锌纳米颗粒器件相比, 基于异质结的光电探测器的响应度在可见光和近红外光区间增加了三个数量级, 同时维持了器件在紫外光范围内的性能不变. 同时, 基于异质结的器件的响应度和探测率高达4.54 A W−1和3.98×1012 Jones. 此外, 所研制的柔性光电探测器在经过数百次的折叠后, 仍表现出了良好的机械和电学稳定性. 本工作为下一代柔性和宽波段光电子器件的研究做了一个初步探索.

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Acknowledgements

The work was funded by the National Natural Science Foundation of China (U1432249), the National Key R&D Program of China (2017YFA0205002), the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD). This is also a project supported by Collaborative Innovation Center of Suzhou Nano Science & Technology and Joint International Research Laboratory of Carbon-Based Functional Materials and Devices. Wen Z thanks the support from China Postdoctoral Science Foundation (2017M610346) and Natural Science Foundation of Jiangsu Province of China (BK20170343).

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Authors and Affiliations

  1. Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, and Joint International Research Laboratory of Carbon-Based Functional Materials and Devices, Soochow University, Suzhou, 215123, China

    Mingfa Peng  (彭明发), Yongjie Wang  (汪永杰), Qingqing Shen  (沈青青), Xinkai Xie  (谢欣凯), Hechuang Zheng  (郑和闯), Wanli Ma  (马万里), Zhen Wen  (文震) & Xuhui Sun  (孙旭辉)

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  1. Mingfa Peng  (彭明发)
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  2. Yongjie Wang  (汪永杰)
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  3. Qingqing Shen  (沈青青)
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  4. Xinkai Xie  (谢欣凯)
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  5. Hechuang Zheng  (郑和闯)
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  6. Wanli Ma  (马万里)
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  7. Zhen Wen  (文震)
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  8. Xuhui Sun  (孙旭辉)
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Correspondence to Zhen Wen  (文震) or Xuhui Sun  (孙旭辉).

Additional information

Mingfa Peng received his BSc degree in Materials Chemistry from Hubei Engineering University in 2008 and MSc degree in Materials Science from Soochow University in 2011, respectively. He is currently a PhD candidate in the Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University. His research focuses primarily on nanomaterialbased device fabrication and self-powered active photodetector.

Zhen Wen received his BSc degree in Materials Science and Engineering from China University of Mining and Technology (CUMT) in 2011 and PhD degree in Materials Physics and Chemistry from Zhejiang University (ZJU) in 2016. During 2014–2016, he was supported by the program of China Scholarship Council (CSC) as a joint PhD student in Georgia Institute of Technology (GT). He joined in Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University as an assistant professor since the end of 2016. His main research interests focus on triboelectric nanogenerator based energy harvesting and self-powered sensing system.

Xuhui Sun is a full professor at the Institute of Functional Nano & Soft Materials (FUNSOM) at Soochow University. He received his PhD degree from the City University of Hong Kong in 2002. He performed postdoctoral research at the University of Western Ontario, Canada from 2003 to 2005 and at NASA Ames Research Center, USA from 2005 to 2007. He became a research scientist at NASA and adjunct assistant professor at Santa Clara University in 2007. His research interests include nanoelectronics, energy harvesting, nanosensors, and the development and application of synchrotron radiation techniques.

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Peng, M., Wang, Y., Shen, Q. et al. High-performance flexible and broadband photodetectors based on PbS quantum dots/ZnO nanoparticles heterostructure. Sci. China Mater. 62, 225–235 (2019). https://doi.org/10.1007/s40843-018-9311-9

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