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Ultralong Room‐Temperature Phosphorescence from Amorphous Polymer Poly(Styrene Sulfonic Acid) in Air in the Dry Solid State
Author(s) -
Ogoshi Tomoki,
Tsuchida Hiromu,
Kakuta Takahiro,
Yamagishi Tadaaki,
Taema Ai,
Ono Toshikazu,
Sugimoto Manabu,
Mizuno Motohiro
Publication year - 2018
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.201707369
Subject(s) - materials science , amorphous solid , polymer , phosphorescence , thermal stability , sulfonic acid , styrene , chemical engineering , polymer chemistry , organic chemistry , copolymer , composite material , chemistry , fluorescence , optics , physics , engineering
Polymer‐based room‐temperature‐phosphorescent (RTP) materials are attractive alternatives to low‐molecular‐weight organic RTP compounds because they can form self‐standing transparent films with high thermal stability. However, their RTP lifetimes in air are usually short (<≈0.4 s). Here, the simple organic amorphous polymer, poly(styrene sulfonic acid) (PSS), exhibits an ultralong RTP lifetime in air when desiccated. The maximum lifetime is 1.22 s, which is three times that of previously reported RTP amorphous organic polymers. The lifetime can be controlled by the PSS molecular weight and by the ratio of sulfonic acid groups introduced into the polymer. The dry polymers should enable unprecedented molecular engineering in organic molecule‐based optoelectronic devices because of the self‐standing and thermal stability attributes.