Premium
Highly Fluorescent and Color‐Tunable Exciplex Emission from Poly( N ‐vinylcarbazole) Film Containing Nanostructured Supramolecular Acceptors
Author(s) -
Kim Jong H.,
An ByeongKwan,
Yoon SeongJun,
Park Sang Kyu,
Kwon Ji Eon,
Lim ChangKeun,
Park Soo Young
Publication year - 2014
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.201302924
Subject(s) - materials science , excimer , exciton , photochemistry , excited state , intermolecular force , homo/lumo , fluorescence , supramolecular chemistry , electron acceptor , photoluminescence , optoelectronics , molecule , optics , chemistry , organic chemistry , physics , quantum mechanics , nuclear physics
Highly fluorescent excited‐state charge‐transfer complexes (exciplexes) formed at the interfacial region between a polymeric donor matrix, here, poly( N ‐vinylcarbazole), and embedded nanostructured acceptors are characterized for their photophysical properties. Exciplex‐to‐exciton emission switching is observed after solvent vapor annealing (SVA) due to the size evolution of the nanostructures beyond the exciton diffusion length. Color‐tunable exiplex emission (sky blue, green, and orange) is demonstrated for three different nanostructured acceptors with the same HOMO–LUMO gap (i.e., the same blue excitonic emission) but with different electron affinity. White‐emitting poly( N ‐vinylcarbazole) film is also fabricated, simply by incorporating mixed supramolecular acceptors, which provide independent exciplex emissions. This study presents important insights into the excited‐state intermolecular interaction at the well‐defined nanoscale interface and suggests an efficient way to obtain multicolored exciplex emissions.