Post-functionalization of polyvinylcarbazoles: An open route towards hole transporting materials for perovskite solar cells

[Display omitted] •Original synthesis of poly(9-vinylcarbazole)-based hole transporting materials (HTM).•Undoped PVK-[N(PhOCH3)2]2 with hole mobility one order of magnitude higher than pristine spiro-OMeTAD.•Doped PVK-[N(PhOCH3)2]2 with hole mobility one order of magnitude higher than doped spiro-OM...

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Bibliographic Details
Published in:Solar energy 2019-11, Vol.193, p.878-884
Main Authors: Geffroy, Camille, Grana, Eftychia, Mumtaz, Muhammad, Cojocaru, Ludmila, Cloutet, Eric, Olivier, Céline, Uchida, Satoshi, Toupance, Thierry, Segawa, Hiroshi, Hadziioannou, Georges
Format: Article
Language:English
Subjects:
Charge transport
Chemical Sciences
Device stability
Energy levels
Hole mobility
Hole-transporting materials
Perovskite solar cells
Perovskites
Photovoltaic cells
Polymers
Polyvinyl carbazole
Polyvinylcarbazoles
Solar cells
Solar energy
Transport properties
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Summary:[Display omitted] •Original synthesis of poly(9-vinylcarbazole)-based hole transporting materials (HTM).•Undoped PVK-[N(PhOCH3)2]2 with hole mobility one order of magnitude higher than pristine spiro-OMeTAD.•Doped PVK-[N(PhOCH3)2]2 with hole mobility one order of magnitude higher than doped spiro-OMeTAD.•As HTM in n-i-p mesoscopic PSCs, PVK-[N(PhOCH3)2]2 yielded PCEs up to 16.7%.•Extended PSC life-time using PVK-[N(PhOCH3)2]2 as HTM without encapsulation. We report on the potential of tuning poly(9-vinylcarbazole) (PVK) properties through functionalization for an application as hole transport material (HTM) for perovskite solar cells (PSCs). The synthesized PVK-based polymers were substituted with moieties of interest to improve the solubility, the charge transport properties, or to tune energy levels. Bis(4-methoxyphenyl)amine moieties were found to improve the hole mobility and to increase the HOMO level of the PVK. Therefore, PSCs employing PVK-[N(PhOCH3)2]2 as HTM exhibited a best PCE of 16.7%. Compared to spiro-OMeTAD, first studies have shown that PVK-[N(PhOCH3)2]2 could extend PSC lifetime.
ISSN:0038-092X
1471-1257
DOI:10.1016/j.solener.2019.10.034