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Molecular engineering of face-on oriented dopant-free hole transporting material for perovskite solar cells with 19% PCE

Through judicious molecular engineering, novel dopant-free star-shaped D-π-A type hole transporting materials coded KR355, KR321, and KR353 were systematically designed, synthesized and characterized. KR321 has been revealed to form a particular face-on organization on perovskite films favoring vert...

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Bibliographic Details
Main Authors: Rakstys, Kasparas (Author) , Marszalek, Tomasz (Author)
Format: Article (Journal)
Language:English
Published: 29 March 2017
In: Journal of materials chemistry. A, Materials for energy and sustainability
Year: 2017, Volume: 5, Issue: 17, Pages: 7811-7815
ISSN:2050-7496
DOI:10.1039/C7TA01718A
Online Access:Verlag, Volltext: http://dx.doi.org/10.1039/C7TA01718A
Verlag, Volltext: https://pubs.rsc.org/en/content/articlelanding/2017/ta/c7ta01718a
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Author Notes:Kasparas Rakstys, Sanghyun Paek, Peng Gao, Paul Gratia, Tomasz Marszalek, Giulia Grancini, Kyung Taek Cho, Kristijonas Genevicius, Vygintas Jankauskas, Wojciech Pisula, Mohammad Khaja Nazeeruddin
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Summary:Through judicious molecular engineering, novel dopant-free star-shaped D-π-A type hole transporting materials coded KR355, KR321, and KR353 were systematically designed, synthesized and characterized. KR321 has been revealed to form a particular face-on organization on perovskite films favoring vertical charge carrier transport and for the first time, we show that this particular molecular stacking feature resulted in a power conversion efficiency over 19% in combination with mixed-perovskite (FAPbI3)0.85(MAPbBr3)0.15. The obtained 19% efficiency using a pristine hole transporting layer without any chemical additives or doping is the highest, establishing that the molecular engineering of a planar donor core, π-spacer and periphery acceptor leads to high mobility, and the design provides useful insight into the synthesis of next-generation HTMs for perovskite solar cells and optoelectronic applications.
Item Description:Gesehen am 17.10.2018
Physical Description:Online Resource
ISSN:2050-7496
DOI:10.1039/C7TA01718A

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