Preferred orientations of organic cations at lead-halide perovskite interfaces revealed using vibrational sum-frequency spectroscopy
Journal article published in 2020 by
Woongmo Sung 
,
Christian Müller,
Sebastian Hietzschold,
Robert Lovrinčić,
Nathaniel P. Gallop ,
Artem A. Bakulin ,
Satoshi Nihonyanagi ,
Tahei Tahara
,
Christian Müller,
Sebastian Hietzschold,
Robert Lovrinčić,
Nathaniel P. Gallop ,
Artem A. Bakulin ,
Satoshi Nihonyanagi ,
Tahei Tahara
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Abstract
Using vibrational sum frequency generation (VSFG) spectroscopy, we investigate the behaviour of organic cations at the surface of a series of multilayer lead halide perovskite systems, finding that the behaviour of the organic cations changes dramatically close to the interface.