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Molecular modification of spiro[fluorene-9,9′-xanthene]-based dopant-free hole transporting materials for perovskite solar cells

Kumar, Vinay; Kumar, Deepak; Chavan, Rohit D. 1; Kumar, Kodali Phani; Yadagiri, Bommaramoni; Ans, Muhammad; Kruszyńska, Joanna; Mahapatra, Apurba; Nawrocki, Jan; Nikiforow, Kostiantyn; Mrkyvkova, Nada; Siffalovic, Peter; Yadav, Pankaj; Akin, Seckin; Singh, Surya Prakash ; Prochowicz, Daniel
1 Lichttechnisches Institut (LTI), Karlsruher Institut für Technologie (KIT)

Abstract:

The molecular engineering of organic hole-transporting materials (HTMs) plays an important role in enhancing the performance and stability of perovskite solar cells (PSCs) as well as reducing their fabrication cost. Here, two low-cost spiro-OMeTAD analogues, namely SP-Naph and SP-SMe, featuring a spiro[fluorene-9,9-xanthene] (SFX) central core and asymmetric subunits are designed and synthesized. Specifically, the SFX core in the SP-Naph molecule is substituted with dimethoxyphenylnaphthylamine subunits to enhance conductivity and charge transport properties by expansion of the π-conjugated structure. On the other hand, in the molecular structure of SP-SMe, the methoxy groups (–OMe) from diphenylamine units were partially replaced with the methylsulfanyl groups (–SMe) to increase interaction with the perovskite surface through the “Lewis soft” S atoms. By combining various experimental and simulation methods, thestructure–property relationship of the newly synthesized HTMs was thoroughly investigated. The suitable HOMO energy level with the perovskite layer together with superior photoelectric properties and enhanced thermostability and humidity resistivity are obtained for the SP-SMe HTM. ... mehr


Verlagsausgabe §
DOI: 10.5445/IR/1000169374
Veröffentlicht am 19.03.2024
Originalveröffentlichung
DOI: 10.1039/D3TA07851E
Scopus
Zitationen: 6
Web of Science
Zitationen: 4
Dimensions
Zitationen: 8
Cover der Publikation
Zugehörige Institution(en) am KIT Lichttechnisches Institut (LTI)
Publikationstyp Zeitschriftenaufsatz
Publikationsdatum 02.04.2024
Sprache Englisch
Identifikator ISSN: 2050-7488, 2050-7496
KITopen-ID: 1000169374
Erschienen in Journal of Materials Chemistry A
Verlag Royal Society of Chemistry (RSC)
Band 12
Heft 14
Seiten 8370–8380
Vorab online veröffentlicht am 20.02.2024
Nachgewiesen in Web of Science
Scopus
Dimensions
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