Branched Fluorenylidene Derivatives with Low Ionization Potentials as Hole-Transporting Materials for Perovskite Solar Cells.
Aistė JegorovėJianxing XiaMatas SteponaitisMaryte DaskevicieneVygintas JankauskasAlytis GruodisEgidijus KamarauskasTadas MalinauskasKasparas RakstysKhalid A AlamryVytautas GetautisMohammad Khaja NazeeruddinPublished in: Chemistry of materials : a publication of the American Chemical Society (2023)
A group of small-molecule hole-transporting materials (HTMs) that are based on fluorenylidene fragments were synthesized and tested in perovskite solar cells (PSCs). The investigated compounds were synthesized by a facile two-step synthesis, and their properties were measured using thermoanalytical, optoelectronic, and photovoltaic methods. The champion PSC device that was doped with lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) reached a power conversion efficiency of 22.83%. The longevity of the PSC device with the best performing HTM, V1387 , was evaluated in different conditions and compared to that of 2,2',7,7'-tetrakis( N,N -di- p -methoxyphenylamine)-9,9'-spirobifluorene (spiro-MeOTAD), showing improved stability. This work provides an alternative HTM strategy for fabricating efficient and stable PSCs.
Keyphrases
- perovskite solar cells
- small molecule
- ionic liquid
- quantum dots
- highly efficient
- metal organic framework
- protein protein
- oxide nanoparticles
- atomic force microscopy
- reduced graphene oxide
- biofilm formation
- drosophila melanogaster
- cystic fibrosis
- gold nanoparticles
- staphylococcus aureus
- mass spectrometry
- solid phase extraction
- crystal structure