NDLI: Light-emitting poly(N-naphthyl-2,7-carbazole)

Content Provider	Royal Society of Chemistry (RSC)
Author	Shinnai, Toshinobu Mori, Takeshi Kijima, Masashi
Copyright Year	2011
Abstract	A blue-emitting poly(2,7-carbazole) having a naphthyl substituent at the N-position (PNCz) was newly synthesised by the Yamamoto method and used to fabricate an organic light emitting diode (OLED). PNCz was highly soluble in common organic solvent with the number average molecular weight (Mn) of 17600 and good thermal stability, with the decomposition temperature higher than 390 °C. PNCz exhibited intense blue photoluminescence with emission peak maxima at 415 nm in CHCl3 and 428 nm in the film state, and the fluorescence quantum efficiency in CHCl3 was extremely high (Φfl = 0.99). The HOMO level estimated by cyclic voltammetry was −5.50 eV and the band gap estimated from an absorption edge was 2.72 eV. The OLED device with a configuration of ITO/PEDOT:PSS/PNCz/CsF/Al exhibited bluish emission with several hundreds cd m−2 and CIE index (x = 0.20, y = 0.21) at low operating voltages in the range of 6–7 V and greenish emission with about 3000 cd m−2 and CIE index (0.25, 0.44) under high operating voltage around 11 V.
Starting Page	2830
Ending Page	2834
Page Count	5
File Format	HTM / HTML PDF
ISSN	17599954
Volume Number	2
Issue Number	12
Journal	Polymer Chemistry
DOI	10.1039/c1py00286d
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	CIE 1931 color space HOMO\/LUMO Poly(3,4-ethylenedioxythiophene) Photoluminescence Fluorescence Electronvolt Substituent Carbazole Quantum tunnelling Cyclic voltammetry Yamamoto OLED Molar mass distribution Band gap Solvent Light-emitting diode
Content Type	Text
Resource Type	Article
Subject	Organic Chemistry Biochemistry Bioengineering Biomedical Engineering Polymers and Plastics

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