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Issue 66, 2015
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Rational design of triazatruxene-based hole conductors for perovskite solar cells

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Abstract

Triazatruxene core based hole transporting materials (HTMs), HMDI (5,10,15-trihexyl-3,8,13-trimethoxy-10,15-dihydro-5H-diindolo[3,2-a:3′,2′-c]carbazole) and HPDI (5,10,15-tris(4-(hexyloxy)phenyl)-10,15-dihydro-5H-diindolo[3,2-a:3′,2′-c]carbazole) were synthesized and exploited in perovskite based solar cells. The energy levels of star-shaped HMDI and HPDI were tuned by symmetrically introducing electron-rich alkoxy side groups. These soluble and easily synthesized materials exhibit optical transparency in the visible region, high thermal stability and have suitable HOMO values with respect to perovskite, making them an ideal HTM candidate for efficient perovskite solar cells. The HPDI molecule-based devices gave competitive power conversion efficiencies of ∼11% under AM 1.5G illumination. The facile synthetic approach using inexpensive precursor materials will facilitate triazatruxene-based molecules to be further exploited in thin film organic–inorganic perovskite solar cells and needs optimization to enhance power conversion efficiency.

Graphical abstract: Rational design of triazatruxene-based hole conductors for perovskite solar cells

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Publication details

The article was received on 16 Apr 2015, accepted on 29 May 2015 and first published on 29 May 2015


Article type: Paper
DOI: 10.1039/C5RA06876B
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Citation: RSC Adv., 2015,5, 53426-53432
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    Rational design of triazatruxene-based hole conductors for perovskite solar cells

    F. J. Ramos, K. Rakstys, S. Kazim, M. Grätzel, M. K. Nazeeruddin and S. Ahmad, RSC Adv., 2015, 5, 53426
    DOI: 10.1039/C5RA06876B

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