Emissive Interface States in Organic Light-Emitting Diodes Based on Tris(8-hydroxyquinoline) Aluminum
Emissive Interface States in Organic Light-Emitting Diodes Based on Tris(8-hydroxyquinoline) Aluminum
复制标题
基于三(8-羟基喹啉)铝的有机发光二极管的发射界面态
DOI:
10.1143/jjap.47.464
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发表时间:
2008
影响因子:
1.5
通讯作者:
T. Morikawa
中科院分区:
文献类型:
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作者:
Y. Nakano;K. Noda;H. Fujikawa;T. Morikawa
We have investigated emissive interface states in fabricated indium–tin-oxide (ITO)/N,N'-di-1-naphthyl-N,N'-diphenyl-1,1'-biphenyl-4,4'diamine (α-NPD)/tris(8-hydroxyquinoline) aluminum (Alq3)/LiF/Al organic light-emitting diodes (OLEDs) by modified deep-level optical spectroscopy (DLOS). DLOS after hole injection into the OLEDs revealed a discrete trap level located at ∼1.77 eV below the conduction band of Alq3 in the emissive interface region, in addition to the band-to-band transitions of charge carriers from α-NPD to Alq3. This pronounced level can be activated as an efficient recombination center of the charge carriers. Also, this trap level was extensively distributed to a lower energy with increasing hole injection rate. Therefore, this level is probably attributable to intrinsic trap states at the α-NPD/Alq3 emissive interface. Thus, DLOS has been proven to be a powerful tool for the characterization of emissive interface states in the OLEDs.
DOI:
--
发表时间:
2021
期刊:
影响因子:
--
作者:
松尾 尚紀;金澤 有紘;青島 貞人;安部省吾 ・ 山 元 和哉 ・ 門川淳一
通讯作者:
安部省吾 ・ 山 元 和哉 ・ 門川淳一
DOI:
--
发表时间:
2006
期刊:
Jpn. J. Appl. Phys. 45
影响因子:
--
作者:
H.Yamamoto;T.Oyamada;W.Hale;S.Aoshima;H.Sasabe;C.Adachi
通讯作者:
C.Adachi