A Highly Efficient, Blue-Phosphorescent Device Based on a Wide-Bandgap Host/FIrpic: Rational Design of the Carbazole and Phosphine Oxide Moieties on Tetraphenylsilane
A Highly Efficient, Blue-Phosphorescent Device Based on a Wide-Bandgap Host/FIrpic: Rational Design of the Carbazole and Phosphine Oxide Moieties on Tetraphenylsilane
复制标题
基于宽带隙主体/FIrpic的高效蓝色磷光器件：四苯基硅烷上咔唑和氧化膦部分的合理设计
DOI：
10.1002/adfm.201103126
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发表时间：
2012-07-10
影响因子：
19
通讯作者：
Ma, Yuguang
中科院分区：
文献类型：
--
作者：
Liu, He;Cheng, Gang;Ma, Yuguang
4-二苯基氧化膦-4‘-9H-咔唑-9-基四苯基硅烷(CSPO)，4-二苯基膦oxide-4’，4？-di(9H-carbazol-9-yl)-tetraphenylsilane(PDCSPO)，4-二苯基氧化膦-4‘-[3-(9H-carbazol-9-yl)-carbazole-9-yl]-tetraphenylsilane(DCSPO)，4-二苯基氧化膦-4’，4？设计并制备了4‘-三(9H-咔唑-9-基)-四苯基硅烷(PTCSPO)和4-二苯基氧化膦-4’-[3，6-di(9H-carbazol-9-yl)-9H-carbazol-9-yl]-tetraphenylsilane(TCSPO)，它们含有不同比例和不同连接方式的p型咔唑单元和n型氧化膦单元。DCSPO是这一系列化合物在FIRIC掺杂器件中的最佳宿主。利用DCSPO和DPOSi作为空穴和电子传输层，在DCSPO/FIrpic掺杂器件中获得了27.5%的EQE和49.4cda-1的最大电流效率。即使在10000cdm-2时，效率仍分别为41.2cda-1和23.0%。
A new series of wide-bandgap materials, 4-dipenylphosphine oxide-4'-9H-carbazol-9-yl-tetraphenylsilane (CSPO), 4-diphenylphosphine oxide-4',4?-di(9H-carbazol-9-yl)-tetraphenylsilane (pDCSPO), 4-diphenylphosphine oxide -4'-[3-(9H-carbazol-9-yl)-carbazole-9-yl]-tetraphenylsilane (DCSPO), 4-diphenylphosphine oxide-4',4?,4?'-tri(9H-carbazol-9-yl)-tetraphenylsilane (pTCSPO) and 4-diphenylphosphine oxide -4'-[3,6-di(9H-carbazol-9-yl)-9H-carbazol-9-yl]-tetraphenylsilane (TCSPO), containing different ratios and linking fashions of p-type carbazole units and n-type phosphine oxide units, are designed and obtained. DCSPO is the best host in FIrpic-doped devices for this series of compounds. By utilizing DCzSi and DPOSi as hole- and electron-transporting layers, a high EQE of 27.5% and a maximum current efficiency of 49.4 cd A-1 are achieved in the DCSPO/FIrpic doped device. Even at 10 000 cd m-2, the efficiencies still remain 41.2 cd A-1 and 23.0%, respectively.