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Improved efficiency of red perovskite quantum dots-based light-emitting diodes by thickness tuning of PEDOT:PSS

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Abstract

To balance the carrier injection, adjusting the thickness of PEDOT:PSS through a simple water diluting was a feasible strategy to improve the efficiency of CsPbBrI2 perovskite quantum dots light-emitting diode (PeLED). CsPbBrI2 perovskite quantum dots (PeQDs) with a uniform and monodisperse cubic phase exhibited a red light at 649 nm and with CIE of (0.697, 0.302). Based on PEDOT:PSS film with the thickness of 40 nm, a CsPbBrI2 PeLED displayed 4.3-fold external quantum efficiency improvement up to 3.44%, and 22.3-fold enhancement in luminance, which was attributed to an effective hole transport and an increased electrical conductivity.

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Acknowledgements

This work was financially supported by the Major Foundation of Guangzhou Science and Technology (No. 201804020005), the Guangdong Natural Science Funds for Distinguished Young Scholars (No. 2015A030306041), the Tip-top Scientific and Technical Innovative Youth Talents of Guangdong Special Support Program (No. 2015TQ01N060), the Guangdong Innovative and Entrepreneurial Research Teams Program (2016ZT06C412), the National Key R&D Program of China, (No. 2020YFB0408100), the National Natural Science Foundation of China (NSFC, No.U20A20340) and the Hundred Talent Program of Guangdong University of Technology (220418095).

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Authors and Affiliations

  1. Guangdong Provincial Key Laboratory of Functional Soft Condensed Matter, School of Materials and Energy, Guangdong University of Technology, Guangzhou, 510006, China

    Xin Zhou, Xuan Tong, Yonggang Min & Yannan Qian

  2. School of Mechanical and Electrical Engineering, Yunnan Agricultural University, Kunming, 650201, China

    Xiaolong Li

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  1. Xin Zhou
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  2. Xuan Tong
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  3. Xiaolong Li
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  4. Yonggang Min
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Contributions

XZ: Conceptualization, Validation, Investigation, and Writing—Original Draft; XT: Investigation and Data curation; XL: Investigation; YM: Conceptualization; YQ: Conceptualization, Supervision, Funding acquisition, Project administration, and Writing—review & editing.

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Correspondence to Xiaolong Li or Yannan Qian.

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Zhou, X., Tong, X., Li, X. et al. Improved efficiency of red perovskite quantum dots-based light-emitting diodes by thickness tuning of PEDOT:PSS. J Mater Sci: Mater Electron 33, 7349–7356 (2022). https://doi.org/10.1007/s10854-022-07834-5

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  • DOI: https://doi.org/10.1007/s10854-022-07834-5

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