angles in the fjord regions than typical [5]helicenes, and optical/electrochemical measurements revealed a significant increase in the electronic communication between the two heteropentacene moieties of the double helicenes compared with their cruciform dimers. The optical resolution of one of the double helicenes was successfully carried out, and their stability towards racemization was remarkably higher
Hole-trapping materials for improved OLED efficiency
申请人:Jarikov V. Viktor
公开号:US20060008672A1
公开(公告)日:2006-01-12
An organic light-emitting device includes a light-emitting layer including a host, a dopant, and a hole-trapping material, wherein the hole-trapping material is provided at 0.01 to less than 5% by volume relative to the light-emitting layer volume, has an oxidation potential that is selected so that it is less than the oxidation potential of the host in order to serve as a hole trap, has an oxidation potential that is selected so as to avoid formation of a certain charge transfer complex between the hole-trapping material and the host if the charge transfer complex causes a reduction in the electroluminescent efficiency of the dopant, and has an oxidation potential that is selected so as to avoid formation of the charge transfer complex between the hole-trapping material and the dopant.
US7504163B2
申请人:——
公开号:US7504163B2
公开(公告)日:2009-03-17
Chemiluminescence of dimethyldioxetanone. Unimolecular generation of excited singlet and triplet acetone. Chemically initiated electron-exchange luminescence, the primary light generating reaction
作者:Steven P. Schmidt、Gary B. Schuster
DOI:10.1021/ja00521a049
日期:1980.1
Abstract : Dimethyldioxetanone (2a) undergoes two distinct thermal reactions which generate electronically excited states. The unimoleculardecomposition of 2a at 30.0 C produces excited singlet and triplet acetone, with efficiencies of 0.1 and 1.5% respectively. The composite activation energy for formation of singlet acetone is 3-4 kcal/mol greater than the activation energy for the thermal disappearance