Exploiting Photo- and Electroluminescence Properties of FIrpic Organic Crystals
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- 作者：Antonio Maggiore ; Marco Pugliese ; Francesca Di Maria ; Gianluca Accorsi ; Massimo Gazzano ; Eduardo Fabiano ; Vittorianna Tasco ; Marco Esposito ; Massimo Cuscunà ; Laura Blasi ; Agostina Capodilupo ; Giuseppe Ciccarella ; Giuseppe Gigli ; Vincenzo Maiorano
- 刊名：Inorganic Chemistry
- 出版年：2016
- 出版时间：July 5, 2016
- 年：2016
- 卷：55
- 期：13
- 页码：6532-6538
- 全文大小：484K
- 年卷期：0
- ISSN：1520-510X
文摘
In this work, we investigate the optical and structural properties of the well-known triplet emitter bis(4′,6′-difluorophenylpyridinato)-iridium(III) picolinate (FIrpic), showing that its ability to pack in two different ordered crystal structures promotes attractive photophysical properties that are useful for solid-state lighting applications. This approach allows the detrimental effects of the nonradiative pathways on the luminescence performance in highly concentrated organic active materials to be weakened. The remarkable electro-optical behavior of sky-blue phosphorescent organic light-emitting diodes incorporating crystal domains of FIrpic, dispersed into an appropriate matrix as an active layer, has also been reported as well as the X-ray diffraction, nuclear magnetic resonance, electro-ionization mass spectrometry, and scanning electron microscopy analyses of the crystalline samples. We consider this result as a crucial starting point for further research aimed at the use of a crystal triplet emitter in optoelectronic devices to overcome the long-standing issue of luminescence self-quenching.