| 摘要 |
本发明系关于有机发光装置，其包含(a)阳极、(i)阴极及(e)在该阳极与该阴极之间的发射层，该发射层包含2重量%至40重量%之具有小于0.2eV之单态能(ES1(X))与三态能(ET1(X))之差[△(ES1(X))-(ET1(X))<0.2eV]的发光有机金属错合物X、0.05重量%至5.0重量%之萤光发射体Y及55重量%至97.95重量%之(若干)主体化合物，其中该有机金属错合物X、该萤光发射体Y及该(等)主体化合物之量总计达100重量%之总数，且该发光有机金属错合物X之该单态能(ES1(X))大于该萤光发射体Y之该单态能(ES1(Y))[(ES1(X))>ES1(Y)]。藉由使用萤光发射体掺杂例如含有具有小S1-T1分裂之发光有机金属错合物的发射层，发射衰变时间可由于极高效能量转移而在不牺牲外部量子效率(EQE)之情况下显着缩短。 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 2 to 40 % by weight of a luminescent organometallic complex X having a difference of the singlet energy (ES1(X)) and the triplet energy (ET1(X)) of smaller than 0.2 eV [△; 0.2 eV], 0.05 to 5.0 % by weight of a fluorescent emitter Y and 55 to 97.95 % 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-T1splitting, with a fluorescent emitter the emission decay time can significantly be shortened without sacrificing external quantum efficiency (EQE) because of very efficient energy transfer. |
