Homoleptic iridium complexes with dibenzothiophene sulfone and triphenylamine groups for orange polymer light-emitting diodes
نویسندگان
چکیده
We have designed and synthesized two new orange light-emitting homoleptic iridium complexes ((p-FSOPyTPA)3Ir (m-FSOPyTPA)3Ir) containing dibenzothiophene sulfone triphenylamine frameworks. Solution-processed polymer devices (PLEDs) are also prepared using these as-synthesized with a single-emission-layer (SEL) structure of ITO/PEDOT:PSS/poly-TPD/EML/TPBI/Ba/Al. Both the exhibited good thermal stability Td > 430 °C. Compared to (p-FSOPyTPA)3Ir, (m-FSOPyTPA)3Ir displayed much better thermal, photophyscial electroluminescent properties owing different coordinate positions sulfone. More importantly, orange-emitting PLEDs based on maximum luminous efficiency (LE) 4.65 cd/A, external quantum (EQE) 2.03%, Commission Internationale de L'Eclairage (CIE) coordinates (0.54, 0.42), when complex doped into matrix PVK/OXD-7 concentration 4 wt %. Our preliminary work could provide promising emitters candidate for development solution-processable highly efficient white PLEDs.
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ژورنال
عنوان ژورنال: Optical Materials
سال: 2021
ISSN: ['1873-1252', '0925-3467']
DOI: https://doi.org/10.1016/j.optmat.2021.111072