Stable Green Electroluminescence from an Iridium Tris-Heteroleptic Ionic Complex

作者：Tordera Daniel; Delgado Manuel; Orti Enrique; Bolink Henk J^*; Frey Julien; Nazeeruddin Md Khaja; Baranoff Etienne

来源：Chemistry of Materials, 2012, 24(10): 1896-1903.

DOI：10.1021/cm3011716

• light-emitting electrochemical cell
• green electroluminescence
• iridium complex
• tris-heteroleptic complex

An ionic tris-heteroleptic iridium complex gives green light-emitting electrochemical cells (LECs) with unprecedented performances for this part of the visible spectrum. The devices are very bright (%26gt;1000 cd m(-2)), efficient (similar to 3%), and stable (%26gt;55 h). The novel complex is prepared using a new and efficient synthetic procedure. We show that there is a mixed orbital formation originating from the two different orthometalating ligands resulting in photophysical properties that lie between those of its two bis-heteroleptic analogs. Therefore, tris-heteroleptic complexes provide new avenues for fine-tunning the emission properties and to bridge gaps between a series of bis-heteroleptic complexes.

• 出版日期2012-5-22