Title:
減衰時間がきわめて短く高度に効率的なＯＬＥＤデバイス
Document Type and Number:
Japanese Patent JP6662913
Kind Code:
B2
Abstract:
The present invention relates to organic light-emitting devices comprising (a) an anode, (i) a cathode, and (e) an emitting layer between the anode and cathode, comprising 40.01 to 99.95 % by weight of a luminescent organometallic complex X having a difference of the singlet energy (ES1(X)) and the triplet energy (ET1(X)) of no more than 0.3 eV [(ES1(X)) - (ET1(X)) ≤ 0.3 eV], 0.05 to 5.00 % by weight of a fluorescent emitter Y and 0 to 59.94 % by weight of a host compound(s), wherein the amount of the organometallic complex X, the fluorescent emitter Y and the host compound(s) adds up to a total of 100% by weight and the singlet energy of the luminescent organometallic complex X (ES1(X)) is greater than the singlet energy of the fluorescent emitter Y (ES1(Y)) [(ES1(X)) > ES1(Y)]. By doping, for example, an emitting layer containing a luminescent organometallic complex having a small S1-T1 splitting, with a fluorescent emitter the emission decay time can significantly be shortened without sacrificing external quantum efficiency (EQE) because of very efficient energy transfer.
Inventors:
Christian Rennartz
Falk My
Hannah Stefanie Mangold
Minle Jean
Grauco Buttarialin
Ilona Stengel
Thomas Wesley Holcombe
Stephan Metz
Falk My
Hannah Stefanie Mangold
Minle Jean
Grauco Buttarialin
Ilona Stengel
Thomas Wesley Holcombe
Stephan Metz
Application Number:
JP2017562714A
Publication Date:
March 11, 2020
Filing Date:
May 31, 2016
Export Citation:
Assignee:
UDC Ireland Limited
International Classes:
H01L51/50; C09K11/06; G09F9/30; H01L27/32
Domestic Patent References:
| JP2014022666A | ||||
| JP2011199019A | ||||
| JP2014041846A | ||||
| JP2013513641A | ||||
| JP2008133277A | ||||
| JP2003520391A | ||||
| JP2015037138A | ||||
| JP2009094124A | ||||
| JP2009176762A |
Foreign References:
| US20150188070 | ||||
| US20120319050 | ||||
| US20120175598 | ||||
| WO2014129330A1 | ||||
| WO2012133188A1 | ||||
| US20120248968 | ||||
| US20140077172 |
Other References:
RAFAL CZERWIENIEC,BLUE-LIGHT EMISSION OF CU(I) COMPLEXES AND SINGLET HARVESTING,INORGANIC CHEMISTRY,2011年 8月 3日,PAGE(S):8293-8301,URL,http://dx.doi.org/10.1021/ic200811a
HIMMETOGLU BURAK et al,Role of electronic localization in the phosphorescence of iridium sensitizing dyes,The Journal of Chemical Physics,2012年10月21日,Vol. 137, Issue 15,p. 154309
HIMMETOGLU BURAK et al,Role of electronic localization in the phosphorescence of iridium sensitizing dyes,The Journal of Chemical Physics,2012年10月21日,Vol. 137, Issue 15,p. 154309
Attorney, Agent or Firm:
Yasuhiko Murayama
Masatake Shiga
Shinya Mitsuhiro
Masatake Shiga
Shinya Mitsuhiro