2D Perovskite Layer based on Novel Organic Cation for Increased Efficiency and Stability


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Günbaş E. G., Yerci S., Gunes U.

2nd International Conference on Photovoltaic Science and Technologies, 30 November - 02 December 2020, pp.98

  • Publication Type: Conference Paper / Summary Text
  • Page Numbers: pp.98
  • Middle East Technical University Affiliated: Yes

Abstract

Low dimensional perovskites have attracted a great attention due to their remarkable stability.

However, their efficiencies are not on par with their 3-dimensional counterparts, which hinders

their commercialization. In this study, we inserted a 2-dimensional perovskite layer using a novel

cation (TT), between the 3D perovskite film and the hole transport layer. 3D-2D perovskite devices

fabricated in this study exhibited a performance enhancement, resulting in an increase in their

power conversion efficiencies (PCE) from 17% to over 19%, by improving hole extraction.

Furthermore, devices showed promising stability as a result of hydrophobic nature of the TT-based

2D layer. 3D-2D PSCs retained 92% of its initial PCE at 15% humidity for 25 days without

encapsulation while the reference devices maintained only 39% of its initial efficiency.