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Efficient perovskite solar cells based on Cdse/Zns quantum dots electron transporting layer with superior UV stability

Tavakoli, M. M ; Sharif University of Technology | 2020

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  1. Type of Document: Article
  2. DOI: 10.1002/pssr.202000062
  3. Publisher: Wiley-VCH Verlag , 2020
  4. Abstract:
  5. Stability is the main challenge in the field of perovskite solar cells (PSCs). Finding new strategies is required to protect the PSCs from deteriorating agents such as humidity, heating, and illumination. Herein, a new electron transporting layer (ETL), i.e., CdSe/ZnS quantum dots (QDs), is proposed for the fabrication of efficient and stable PSCs. CdSe/ZnS QDs layer not only works as an ETL but also has downshifting property, which can improve both efficiency and stability of the PSCs. Using CdSe/ZnS QDs ETL with green emission, a PSC with maximum power conversion efficiency (PCE) of 18% is achieved. More importantly, the device shows great UV stability, much better than the device with TiO2 ETL, where it retains 90% of its initial PCE value after 75 h under continuous UV illumination. © 2020 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
  6. Keywords:
  7. CdSe/ZnS quantum dots ; UV stability ; Cadmium compounds ; Efficiency ; II-VI semiconductors ; Nanocrystals ; Perovskite ; Perovskite solar cells ; Stability ; Titanium dioxide ; Device stability ; Down-shifting layer ; Electron transporting layer ; Green emissions ; Maximum power ; UV illuminations ; Semiconductor quantum dots
  8. Source: Physica Status Solidi - Rapid Research Letters ; Volume 14, Issue 6 , 2020
  9. URL: https://onlinelibrary.wiley.com/doi/abs/10.1002/pssr.202000062