Stable efficiency roll-off in red phosphorescent organic light-emitting diodes using a spirofluorene–benzofluorene based carbazole type host material
Stable efficiency roll-off in red phosphorescent organic light-emitting diodes using a spirofluorene–benzofluorene based carbazole type host material
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DOI：
10.1016/j.jlumin.2010.06.017
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发表时间：
2010-11
影响因子：
3.6
通讯作者：
S. Jang;S. Jeon;Yong Joo Cho;K. Yook;Jun Yeob Lee
中科院分区：
文献类型：
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作者：
S. Jang;S. Jeon;Yong Joo Cho;K. Yook;Jun Yeob Lee
以螺芴-苯并芴为主体的咔唑类基质材料制备了具有稳定的效率衰减的红色磷光有机电致发光器件。合成了含有咔唑单元和螺[苯并[c]芴-7，9 ′-芴]的9-（螺[苯并[c]芴-7，9 ′-芴]-2′-基）-9H-咔唑，并将其用作红色PHOLED的主体材料。当掺杂浓度为1%时，红色PHOLED的量子效率达到最佳值，当掺杂浓度为10，000 cd/m2时，效率下降小于10%。
Red phosphorescent organic light-emitting diodes (PHOLEDs) with stable efficiency roll-off were developed using a spirofluorene–benzofluorene based carbazole type host material. 9-(Spiro[benzo[c]fluorene-7,9′-fluorene]-2′-yl)-9H-carbazole with a spiro[benzofluorene-7,9′-fluorene] and a carbazole unit was synthesized and it was used as the host material for the red PHOLED. The quantum efficiency of the red PHOLED was optimized at a doping concentration of 1% and the efficiency decrease at 10,000cd/m2from the maximum efficiency was less than 10%.