Universität zu Köln

Akin, Seckin, Bauer, Michael ORCID: 0000-0002-1035-3139, Hertel, Dirk, Meerholz, Klaus, Zakeeruddin, Shaik M., Graetzel, Michael, Baeuerle, Peter and Dar, M. Ibrahim (2022). Robust Nonspiro-Based Hole Conductors for High-Efficiency Perovskite Solar Cells. Adv. Funct. Mater., 32 (45). WEINHEIM: WILEY-V C H VERLAG GMBH. ISSN 1616-3028

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Abstract

Despite considerable development in performance, both poor operational stability and high costs associated with hole conductors such as 2,2 ',7,7 '-tetrakis[N,N-di(4-methoxyphenyl)amino]-9,9 '-spirobifluorene (spiro-OMeTAD) and Poly[bis(4-phenyl)(2,4,6-trimethylphenyl)amine (PTAA) of perovskite solar cells (PSCs) need to be addressed by the research community. Here, two nonspiro hole transporting materials (HTMs), namely HTM-1 and HTM-2, are designed and straightforwardly synthesized exhibiting remarkable electrochemical properties and hole mobilities. In particular, the PSC based on the methoxy derivative (HTM-2) exhibits a remarkable efficiency of 21.2% (stabilized efficiency of 20.8%), which is superior to the benchmark HTM spiro-OMeTAD (stabilized efficiency of 20.4%). These results establish that the molecular design is effective in improving the performance of PSCs. Importantly, these two HTMs show admissible long-term stability under different harsh conditions such as thermal stress up to 85 degrees C, high humidity level of 60% +/- 10%, and continuous illumination over 1000 h. These insights allow correlating the impact of molecular design on optoelectronic properties of nonspiro-based hole conductors with the overall device performance.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Akin, Seckin UNSPECIFIED UNSPECIFIED UNSPECIFIED Bauer, Michael UNSPECIFIED orcid.org/0000-0002-1035-3139 UNSPECIFIED Hertel, Dirk UNSPECIFIED UNSPECIFIED UNSPECIFIED Meerholz, Klaus UNSPECIFIED UNSPECIFIED UNSPECIFIED Zakeeruddin, Shaik M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Graetzel, Michael UNSPECIFIED UNSPECIFIED UNSPECIFIED Baeuerle, Peter UNSPECIFIED UNSPECIFIED UNSPECIFIED Dar, M. Ibrahim UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-681054
DOI:	10.1002/adfm.202205729
Journal or Publication Title:	Adv. Funct. Mater.
Volume:	32
Number:	45
Date:	2022
Publisher:	WILEY-V C H VERLAG GMBH
Place of Publication:	WEINHEIM
ISSN:	1616-3028
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language TRANSPORTING MATERIAL Multiple languages Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/68105