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How to minimize voltage and fill factor losses to achieve over 20% efficiency lead chalcogenide quantum dot solar cells: Strategies expected through numerical simulation

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Listed:
  • Wang, Dandan
  • Li, Yusheng
  • Yang, Yongge
  • Hayase, Shuzi
  • Wu, Haifeng
  • Wang, Ruixiang
  • Ding, Chao
  • Shen, Qing

Abstract

Lead chalcogenide colloidal quantum dot solar cells (CQDSCs) have the potential to revolutionize the field of light-to-electricity conversion with their exceptional optoelectronic properties. Unfortunately, realizing their full potential has been hindered by persistent and poorly understood limitations in fill factor (FF) and open-circuit voltage (Voc) losses. In this study, we performed a systematic numerical analysis of practical PbS CQDSCs to identify the root causes of FF and Voc losses in the current development stage, and to provide a clear and feasible roadmap for achieving a PCE of more than 20% in future development stages. Our analysis revealed that the highly effective route for enhancing the current 10% device is to initially modify the internal resistances, resulting in a significant reduction in FF losses to 15%, followed by systematic optimization of surface recombination velocities in the absorber layer and the absorber/hole transfer layer (HTL) interface, which can generate a Voc improvement of 3.76%, ultimately leading to a near-15% PCE. To further elevate PCE to unprecedented heights, we identified the precise regulation of surface excess charge densities at the absorber/HTL interface and the HTL/back contact interface as critical factors. By finely tuning these performance-limiting factors, we demonstrated the feasibility of achieving over 20% PCE, with minimal Voc loss of 318.10 mV and almost negligible FF loss of 6.08% in PbS CQDSCs. Our investigation provides crucial insights into the causes of FF and Voc losses in PbS CQDSCs and offers a clear pathway for future progress in this rapidly evolving field.

Suggested Citation

  • Wang, Dandan & Li, Yusheng & Yang, Yongge & Hayase, Shuzi & Wu, Haifeng & Wang, Ruixiang & Ding, Chao & Shen, Qing, 2023. "How to minimize voltage and fill factor losses to achieve over 20% efficiency lead chalcogenide quantum dot solar cells: Strategies expected through numerical simulation," Applied Energy, Elsevier, vol. 341(C).
    • Handle: RePEc:eee:appene:v:341:y:2023:i:c:s0306261923004889
    DOI: 10.1016/j.apenergy.2023.121124
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    References listed on IDEAS

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    4. Khanali, Majid & Ghasemi-Mobtaker, Hassan & Varmazyar, Hossein & Mohammadkashi, Naghmeh & Chau, Kwok-wing & Nabavi-Pelesaraei, Ashkan, 2022. "Applying novel eco-exergoenvironmental toxicity index to select the best irrigation system of sunflower production," Energy, Elsevier, vol. 250(C).
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