首页> 外文期刊>Angewandte Chemie >Near-IR Emitting Iridium(III) Complexes with Heteroaromatic beta-Diketonate Ancillary Ligands for Efficient Solution-Processed OLEDs: Structure-Property Correlations
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Near-IR Emitting Iridium(III) Complexes with Heteroaromatic beta-Diketonate Ancillary Ligands for Efficient Solution-Processed OLEDs: Structure-Property Correlations

机译:高效芳香溶液加工的OLED的杂芳族β-二酮酸酯辅助配体的近红外发射铱(III)配合物:结构性质相关性

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摘要

Three NIR-emitting neutral Ir-III complexes [Ir(iqbt)(2)(dpm)] (1), [Ir(iqbt)(2)(tta)] (2), and [Ir(iqbt) 2(dtdk)] (3) based on the 1-(benzo[b] thiophen-2-yl)-isoquinolinate (iqtb) were synthesized and characterized (dpm= 2,2,6,6-tetramethyl- 3,5-heptanedionate; tta= 2-thienoyltrifluoroacetonate; dtdk= 1,3-di(thiophen-2-yl) propane-1,3-dionate). The compounds emit between lambda= 680 and 850 nm with high luminescence quantum yields (up to 16%). By combining electrochemistry, photophysical measurements, and computational modelling, the relationship between the structure, energy levels, and properties were investigated. NIR-emitting, solutionprocessed phosphorescent organic light-emitting devices (PHOLEDs) were fabricated using the complexes. The devices show remarkable external quantum efficiencies (above 3% with 1) with negligible efficiency roll-off values, exceeding the highest reported values for solution-processible NIR emitters.
机译:三种发射NIR的中性Ir-III配合物[Ir(iqbt)(2)(dpm)](1),[Ir(iqbt)(2)(tta)](2)和[Ir(iqbt)2(dtdk) )](3)合成并表征了1-(苯并[b]噻吩-2-基)-异喹啉酸酯(iqtb)(dpm = 2,2,6,6-四甲基-3,5-庚二酸酯; tta = 2-噻吩基三氟丙酮酸酯; dtdk = 1,3-二(噻吩-2-基)丙烷-1,3-二酸酯)。化合物以发光量子产率(高达16%)发射λ= 680至850 nm。通过将电化学,光物理测量和计算建模相结合,研究了结构,能级和性质之间的关系。使用该配合物制备了发射近红外光,溶液处理的磷光有机发光器件(PHOLED)。该器件显示出显着的外部量子效率(3%高于1),其效率下降值可忽略不计,超过了可溶液处理的NIR发射器的最高报告值。

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