《Triarylamine-Pyridine-Carbonitriles for Organic Light-Emitting Devices with EQE Nearly 40%》 was written by Chen, Yi-Kuan; Jayakumar, Jayachandran; Hsieh, Chia-Min; Wu, Tien-Lin; Liao, Chun-Cheng; Pandidurai, Jayabalan; Ko, Chang-Lun; Hung, Wen-Yi; Cheng, Chien-Hong. Safety of 3-Oxo-3-phenylpropanenitrileThis research focused ontriarylamine pyridine carbonitrile organic light emitting device photoluminescence; external quantum efficiency of nearly 40%; molecular orientation; operational stability; organic light-emitting diodes; pyridine-carbonitrile; thermally activated delayed fluorescence; triphenylamine. The article conveys some information:
Highly efficient thermally activated delayed fluorescence (TADF) mols. are in urgent demand for solid-state lighting and full-color displays. Here, the design and synthesis of three triarylamine-pyridine-carbonitrile-based TADF compounds, TPAPPC, TPAmPPC, and tTPAmPPC, are shown. They exhibit excellent photoluminescence quantum yields of 79-100% with small ΔEST values, fast reverse intersystem crossing (RISC), and high horizontal dipole ratios (Θ// = 86-88%) in the thin films leading to the enhancement of device light outcoupling. Consequently, a green organic light-emitting diode (OLED) based on TPAmPPC shows a high average external quantum efficiency of 38.8 ± 0.6%, a current efficiency of 130.1 ± 2.1 cd A-1, and a power efficiency of 136.3 ± 2.2 lm W-1. The highest device efficiency of 39.8% appears to be record-breaking among TADF-based OLEDs to date. In addition, the TPAmPPC-based device shows superior operation lifetime and high-temperature resistance. It is worth noting that the TPA-PPC-based materials have excellent optical properties and the potential for making them strong candidates for TADF practical application. In the experiment, the researchers used 3-Oxo-3-phenylpropanenitrile(cas: 614-16-4Safety of 3-Oxo-3-phenylpropanenitrile)
3-Oxo-3-phenylpropanenitrile(cas: 614-16-4) has been used in the synthesis of substituted naphtho[1,8-bc]pyrans. It was also used as building block in the preparation of 4H-pyrans, 2-pyridones, furans and carbocyclics.Safety of 3-Oxo-3-phenylpropanenitrile
Referemce:
Nitrile – Wikipedia,
Nitriles – Chemistry LibreTexts