当前位置：
X-MOL 学术
›
Adv. Funct. Mater.
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Efficient Near-Infrared Organic Light-Emitting Diodes with Emission Peak Above 900 nm Enabled by Enhanced Photoluminescence Quantum Yields and Out-Coupling Efficiencies
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2024-01-24 , DOI: 10.1002/adfm.202313353 Chen An 1 , Wanyuan Deng 1 , Yuan Xie 1 , Kang An 1 , Huan Cao 1 , Dezhi Yang 1 , Yihui Chen 1 , Wansheng Liu 1 , Yuhang Xu 1 , Ning Li 1 , Hongbin Wu 1 , Yong Cao 1
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2024-01-24 , DOI: 10.1002/adfm.202313353 Chen An 1 , Wanyuan Deng 1 , Yuan Xie 1 , Kang An 1 , Huan Cao 1 , Dezhi Yang 1 , Yihui Chen 1 , Wansheng Liu 1 , Yuhang Xu 1 , Ning Li 1 , Hongbin Wu 1 , Yong Cao 1
Affiliation
|
Near-infrared organic light-emitting diodes (NIR OLEDs) with emission peak above 900 nm are attractive for many emerging applications, spanning from bioimaging to light detection and ranging. However, the device performance of NIR OLEDs is generally limited by the low quantum efficiency of emitters because of the fast nonradiative transition process imposed by energy-gap law and aggregation quenching. So far, only a few Pt(II) complexes delivering external quantum efficiency (EQE) over 1% are reported, while there is no comparable electroluminescence in heavy-metal-free fluorescent organic emitters. Here, NIR OLEDs centered at 934 nm by blending an acceptor–donor–acceptor type molecule Y11 into a polymer host poly[(9,9-dioctylfluorenyl-2,7-diyl)-alt-(4,4′-(N-(4-sec-butylphenyl)diphenylamine) (TFB) are reported. The OLEDs show a remarkably high EQE of 1.72%. Moreover, owing to a low turn-on voltage (≈0.9 V), the resultant NIR OLEDs have an electricity-to-light power efficiency surpassing 20 mW W−1. The improved device performance can be attributed to enhanced photoluminescence quantum yields (PLQYs) of the blends owing to suppressed aggregation quenching, and favorable light extraction from the emissive layer. Such values are the highest among fluorescent OLEDs with electroluminescence above 900 nm.
中文翻译：
通过增强光致发光量子产率和输出耦合效率实现发射峰值高于 900 nm 的高效近红外有机发光二极管
发射峰值高于 900 nm 的近红外有机发光二极管 (NIR OLED) 对于从生物成像到光检测和测距等许多新兴应用都很有吸引力。然而，由于能隙定律和聚集猝灭造成的快速非辐射跃迁过程，近红外 OLED 的器件性能通常受到发射器量子效率低的限制。到目前为止，只有少数 Pt(II) 配合物的外量子效率 (EQE) 超过 1% 被报道，而不含重金属的荧光有机发光体还没有类似的电致发光性能。在这里，通过将受体-供体-受体型分子 Y11 混合到聚合物主体聚[(9,9-二辛基芴基-2,7-二基)-alt-(4,4'-(N-据报道，(4-仲丁基苯基)二苯胺) (TFB) 具有 1.72% 的极高 EQE，而且由于开启电压较低（约 0.9 V），所得的 NIR OLED 具有电致发光特性。超过20 mW W -1 的光功率效率的提高可归因于由于抑制的聚集猝灭以及从发射层的有利的光提取而提高的共混物的光致发光量子产率（PLQY）。电致发光波长超过 900 nm 的荧光 OLED。
更新日期：2024-01-24
中文翻译：
通过增强光致发光量子产率和输出耦合效率实现发射峰值高于 900 nm 的高效近红外有机发光二极管
发射峰值高于 900 nm 的近红外有机发光二极管 (NIR OLED) 对于从生物成像到光检测和测距等许多新兴应用都很有吸引力。然而，由于能隙定律和聚集猝灭造成的快速非辐射跃迁过程，近红外 OLED 的器件性能通常受到发射器量子效率低的限制。到目前为止，只有少数 Pt(II) 配合物的外量子效率 (EQE) 超过 1% 被报道，而不含重金属的荧光有机发光体还没有类似的电致发光性能。在这里，通过将受体-供体-受体型分子 Y11 混合到聚合物主体聚[(9,9-二辛基芴基-2,7-二基)-alt-(4,4'-(N-据报道，(4-仲丁基苯基)二苯胺) (TFB) 具有 1.72% 的极高 EQE，而且由于开启电压较低（约 0.9 V），所得的 NIR OLED 具有电致发光特性。超过20 mW W -1 的光功率效率的提高可归因于由于抑制的聚集猝灭以及从发射层的有利的光提取而提高的共混物的光致发光量子产率（PLQY）。电致发光波长超过 900 nm 的荧光 OLED。
京公网安备 11010802027423号