Sublimation not an innocent technique: A case of bis-cyclometalated iridium emitter for OLED
Sublimation not an innocent technique: A case of bis-cyclometalated iridium emitter for OLED
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DOI：
10.1021/ic800747t
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发表时间：
2008-08-04
影响因子：
4.6
通讯作者：
Nazeeruddin, Md. K.
中科院分区：
文献类型：
--
作者：
Baranoff, Etienne;Suarez, Stephane;Nazeeruddin, Md. K.
在真空处理有机电致发光器件(OLED)的制备过程中，首次观察到中性双环金属Ir(III)配合物的异构化，并在溶液中重现。异构体的分离揭示了环金属配体的两个吡啶环的顺式结构。光物理研究表明，这两种异构体的发射性质非常相似。然而，由于原位异构化，只能制备具有异构体混合物的真空处理的OLED器件。
Isomerization of a neutral bis-cyclometalated iridium(III) complex has been observed for the first time during the preparation of vacuum-processed organic light-emitting devices (OLEDs) and reproduced in solution. Isolation of the isomer revealed a cis organization of the two pyridine rings of the cyclometalating ligands. Photophysical studies show very similar emission properties of the two isomers. However, due to in situ isomerization, it is only possible to prepare vacuum-processed OLED devices having a mixture of isomers.