155143-83-2Relevant academic research and scientific papers
Molecular engineering of face-on oriented dopant-free hole transporting material for perovskite solar cells with 19% PCE
Rakstys, Kasparas,Paek, Sanghyun,Gao, Peng,Gratia, Paul,Marszalek, Tomasz,Grancini, Giulia,Cho, Kyung Taek,Genevicius, Kristijonas,Jankauskas, Vygintas,Pisula, Wojciech,Nazeeruddin, Mohammad Khaja
, p. 7811 - 7815 (2017)
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.
