Triphenylamine-functionalized iridium(III) complexes for near-infrared phosphorescent organic light emitting diodes
| Autor: | Maoqiu Li, Weiguo Zhu, Fanyuan Meng, Junting Yu, Chao Xu, Hua Tan |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Materials science
Ligand Process Chemistry and Technology General Chemical Engineering chemistry.chemical_element 02 engineering and technology Electroluminescence 010402 general chemistry 021001 nanoscience & nanotechnology Photochemistry Triphenylamine 01 natural sciences 0104 chemical sciences chemistry.chemical_compound chemistry OLED Fluorine Quantum efficiency Iridium 0210 nano-technology Phosphorescence |
| Zdroj: | Dyes and Pigments. 166:307-313 |
| ISSN: | 0143-7208 |
| DOI: | 10.1016/j.dyepig.2019.03.047 |
| Popis: | With the aim of enhancing the efficiency of near infrared (NIR) organic light-emitting devices (OLEDs), two new triphenylamine-functionalized NIR iridium(III) complexes by covalently attaching the functional moieties (tBu and F) complexes (tBuTPA-BTz-Iq)2Irpic and (FTPA-BTz-Iq)2Irpic were designed and synthesized (TPA = triphenylamine; BTz = benzotriazole; Iq = isoquinoline). It was found that compared to their parent iridium complex (TPA-BTz-Iq)2Irpic, the addition of either butyl or fluorine groups into the ligand play an important role in improving the optophysical and electroluminescent characteristics. In solution-processed phosphorescent OLEDs, the (tBuTPA-BTz-Iq)2Irpic-based devices achieved a maximum external quantum efficiency (EQEmax) of 0.66% at 716 nm, while the (FTPA-BTz-Iq)2Irpic-based devices achieved an EQEmax of 0.48% at 710 nm. The EQEmax level is 2.28 or 1.65 times higher than that in the (TPA-BTz-Iq)2Irpic-based devices (0.29% at 712 nm), respectively. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect