4.7 Article

Enhanced interfacial characteristics of perovskite solar cell with multi-functional organic hole-selective interlayer

Journal

DYES AND PIGMENTS
Volume 197, Issue -, Pages -

Publisher

ELSEVIER SCI LTD
DOI: 10.1016/j.dyepig.2021.109837

Keywords

Perovskite solar cell; Interface; Defect-passivation; Organic hole-selective interlayer; Nickel oxide; Material design

Funding

  1. National Research Foundation of Korea (NRF) - Ministry of Education [NRF-2020R1A2C2010342]
  2. Korea Institute for Advancement of Technology (KIAT) - Korea Government (MOTIE) [P0012770]

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A newly designed organic molecule enhances the interfacial properties between a solution-processed NiOx hole transport layer and perovskite in PSCs, improving the performance and stability of the devices by optimizing energy levels and increasing solution processability.
In solution-processed organic and inorganic halide perovskite solar cells (PSCs), managing the interfacial characteristics between multi-layers has been a crucial factor in determining their performance and stability. Here, we newly design an indolocarbazole-based organic molecule that can enhance the interfacial properties between a solution-processed NiOx hole transport layer and perovskite in p-i-n planar PSC. Especially, to be beneficial to this architecture, its visible transparency and energy level are optimized, and its chemical structure is crosslinked for better solution processability as a hole-selective interlayer. More importantly, it can passivate the defects in the perovskite film, consequently enhancing the quality of the film and suppressing non-radiative recombination in the devices. With this interface modification, we confirm that the performance and stability of PSC devices are largely enhanced.

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