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1.
Chem Commun (Camb) ; (2): 217-9, 2008 Jan 14.
Article in English | MEDLINE | ID: mdl-18092092

ABSTRACT

Bright (maximum 11,000 cd m(-2) and 500 cd m(-2) at 20 mA cm(-2)) and efficient (maximum external quantum efficiency of 3.1% at 1 mA cm(-2)) red (CIE, x = 0.66, y = 0.34) organic light-emitting diodes (OLEDs) employ arylaminospirobifluorene-substituted fumaronitriles as the novel non-dopant red emitter.

2.
Org Lett ; 8(13): 2799-802, 2006 Jun 22.
Article in English | MEDLINE | ID: mdl-16774260

ABSTRACT

[reaction: see text] A series of carbazole/fluorene (CBZm-Fn) hybrids were effectively synthesized through Friedel-Crafts-type substitution of the carbazole rings. These compounds were thermally and morphologically stable host materials for OLED applications. Efficient blue phosphorescent OLEDs were obtained when employing CBZ1-F2 as the host and FIrpic as the guest.

3.
Org Lett ; 7(17): 3717-20, 2005 Aug 18.
Article in English | MEDLINE | ID: mdl-16092858

ABSTRACT

Pure 2,2'-Dibromo-9,9'-spirobifluorene was synthesized by a method that did not involve troublesome dibromination of 9,9'-spirobifluorene or Sandmeyer reaction of 2,2'-diamino-9,9'-spirobifluorene. A series of donor-acceptor orthogonally substituted 9,9'-spirobifluorene was subsequently prepared showing rich variation of fluorescence in solution and in solid state. [reaction: see text]


Subject(s)
Fluorenes/chemical synthesis , Fluorescent Dyes/chemical synthesis , Hydrocarbons, Brominated/chemical synthesis , Spiro Compounds/chemical synthesis , Catalysis , Molecular Structure
4.
Org Lett ; 5(8): 1261-4, 2003 Apr 17.
Article in English | MEDLINE | ID: mdl-12688734

ABSTRACT

[structure: see text] Newly synthesized arylamino-substituted coumarins and stilbenes show enhanced fluorescence emission (bluer and brighter) both in solution and in solid film. Pure blue efficient electroluminescence with 2.7% and 4.1% of external quantum efficiency can be achieved with MeC1 and XTPS, respectively.

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