Surface modification of a hole transporting layer for an efficient perovskite solar cell with an enhanced fill factor and stability

Tavakoli, M. M ; Sharif University of Technology

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  1. Type of Document: Article
  2. DOI: 10.1039/c8me00036k
  3. Abstract:
  4. The improvement of the quality of the hole transporting layer (HTL) plays a key role in the fabrication of highly efficient and stable perovskite solar cells (PSCs). Here, we used rubrene as a surface treatment agent on top of a spiro HTL. We found that rubrene can cover the pinholes of the spiro layer and provide an excellent contact layer for planar PSCs. Based on this modification, mobile gold ions from the metal electrode are prevented from diffusing through the HTL hindering the degradation of PSCs. The optimized device shows a maximum power conversion efficiency (PCE) of 19.87% and a 79% fill factor (FF), which are higher than the 17.98% PCE and 72% FF of the reference device. In addition, the device after modification demonstrates better stability after 100 h under continuous light illumination retaining 97% of its initial performance compared with 65% of the reference device. © 2018 The Royal Society of Chemistry
  5. Keywords:
  6. Hole mobility ; Perovskite ; Solar cells ; Surface treatment ; Contact layers ; Continuous light ; Hole transporting layers ; Maximum power ; Metal electrodes ; Optimized devices ; Reference devices ; Surface treatment agents ; Perovskite solar cells
  7. Source: Molecular Systems Design and Engineering ; Volume 3, Issue 5 , 2018 , Pages 717-722 ; 20589689 (ISSN)
  8. URL: https://pubs.rsc.org/en/content/articlelanding/2018/me/c8me00036k#!divAbstract