Tris-heteroleptic iridium complexes for white emission

[摘要] Within the past decades, extensive research has been focusing on developing electroluminescenttechnologies (OLED and LEC). Especially, a lot of effort has been dedicated to the search a efficient phosphorescent materials with highly tuneable emission maxima bearing l a te transition metal atoms. Emitters such as cyclometalatedidirium complexes have been proven to be very successful in this regards exhibiting colours from blue to red and being successfully applied in electroluminescent technologies. However, in order to decrease the manufacturingcost of these technologies, a single-centrewhite emitting material is highly desirable. In this context, this work investigates a new family of complexesbearing three different bidentate ligands known as tris-heterolepticcomplexes to develop an emitter with a broad emission profile that would result in a white colour. Eighteen new tris-heterolepticcomplexes with unprecedented ligand configurations have been synthesised by mixing different kind of ligand such as phenylpyridines(ppy), phenylpyrazo les (ppz) and phenylimidazoles(pim). This resulted in significant emission broadening with FWHM values up to nearly 6000 em- 1.

[发布机构] University:University of Birmingham;Department:School of Chemistry

[关键词] Q Science;QD Chemistry