White light emission from exciplex in a bilayer device with two blue light-emitting polymers
White light emission from exciplex in a bilayer device with two blue light-emitting polymers
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DOI：
10.1063/1.121888
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发表时间：
1998-07-27
影响因子：
4
通讯作者：
Chen, SA
中科院分区：
文献类型：
--
作者：
Chao, CI;Chen, SA
具有两种蓝光发射材料聚（N-乙烯基咔唑）（PVK）和聚（2-十二烷基-对亚苯基）（C12 O-PPP）的双层聚合物发光二极管可以发射蓝光或白色光，这取决于在第二层C12 O-PPP的制造中使用的溶剂。如果使用己烷（PVK的非溶剂），则该器件作为具有C12 O-PPP的单层器件发射蓝光。然而，如果使用甲苯（两种聚合物的共溶剂），除了来自C12 O-PPP的激子发射之外，该器件还发射源自双层界面处的激基复合物发射的白色光。在低温下。激基复合物发射的强度下降并且激子发射的强度变为主导。(C)1998年美国物理学会。
Bilayer polymer light-emitting diodes with two blue light-emitting materials, poly(N-vinylcarbazole) (PVK) and poly(2-dodecyl-p-phenylene) (C12O-PPP), can emit blue or white light, depending on the solvent used in the fabrication of the second layer, C12O-PPP. If hexane (the nonsolvent for PVK) is used, the device emits blue light as a single layer device with C12O-PPP. However, if toluene (the cosolvent for the two polymers) is used, the device emits white light originating from an exciplex emission at the bilayer interface in addition to the exciton emission from C12O-PPP. At low temperatures. the intensity of the exciplex emission drops and that of the exciton emission becomes dominant. (C) 1998 American Institute of Physics.