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Encapsulation strategies for highly stable perovskite solar cells under severe stress testing: damp heat, freezing, and outdoor illumination conditions

Mohammadi, M ; Sharif University of Technology | 2021

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  1. Type of Document: Article
  2. DOI: 10.1021/acsami.1c11628
  3. Publisher: American Chemical Society , 2021
  4. Abstract:
  5. A key direction toward managing extrinsic instabilities in perovskite solar cells (PSCs) is encapsulation. Thus, a suitable sealing layer is required for an efficient device encapsulation, preventing moisture and oxygen ingression into the perovskite layer. In this work, a solution-based, low-cost, and commercially available bilayer structure of poly(methyl methacrylate)/styrene-butadiene (PMMA/SB) is investigated for PSCs encapsulation. Encapsulated devices retained 80% of the initial power conversion efficiency (PCE) at 85 °C temperature and 85% relative humidity after 100 h, while reference devices without SB (only PMMA) suffer from rapid and intense degradation after only 2 h, under the same condition. In addition, encapsulated devices retained 95% of the initial PCE under −15 °C freezing temperature after 6 h and retained ∼80% of the initial PCE after immersion in HCl (37%) for 90 min. Moreover, applying an additional aluminum metal sheet on the PMMA/SB protective bilayer leads to the improvement of device stability up to 500 h under outdoor illumination, retaining almost 90% of the initial PCE. Considering the urge to develop reliable, scalable, and simple encapsulation for future large-area PSCs, this work establishes solution-based bilayer encapsulation, which is applicable for flexible solar modules as well as other optoelectronic devices such as light-emitting devices and photodetectors.improvement of device stability up to 500 h under outdoor illumination, retaining almost 90% of the initial PCE. Considering the urge to develop reliable, scalable, and simple encapsulation for future large-area PSCs, this work establishes solution-based bilayer encapsulation, which is applicable for flexible solar modules as well as other optoelectronic devices such as light-emitting devices and photodetectors. © 2021 American Chemical Society
  6. Keywords:
  7. Bromine compounds ; Chlorine compounds ; Costs ; Current density ; Freezing ; Lead compounds ; Light emission ; Perovskite solar cells ; Photodetectors ; Photons ; Sheet metal ; Bi-layer ; Device stability ; Organic-inorganic perovskite ; Organic/inorganic ; PMMA ; Poly(methyl methacrylate) ; Poly-methyl methacrylates ; Power conversion efficiencies ; Simple++ ; Styrene/butadiene ; Perovskite
  8. Source: ACS Applied Materials and Interfaces ; Volume 13, Issue 38 , 2021 , Pages 45455-45464 ; 19448244 (ISSN)
  9. URL: https://pubs.acs.org/doi/abs/10.1021/acsami.1c11628