High-efficiency and long-lifetime deep-blue organic light-emitting diode with a maximum external quantum efficiency of 20.6% and CIEy of 0.04 was written by Hu, Suhao;Tian, Yuhe;Lin, Yang;Shi, Wei;Pang, Yudong;Pan, Saihu;Wei, Bin. And the article was included in Dyes and Pigments in 2022.COA of Formula: C18N12 This article mentions the following:
We synthesized a diphenylamine modified pyrene derivative, 4,9-diisopropyl-N,N,N’,N’-tetrakis-(4-methyl-biphenyl-3-yl)-pyrene-1,6-diamine (DITBDAP), and successfully applied it to deep-blue organic light-emitting diodes (OLEDs). The DITBDAP-based top-emitting OLED was featured by a high maximum external quantum efficiency (EQEmax) of 20.6%, an extremely low CIEy (Commission International de L’Eclairage coordinates) of 0.04, a narrow full-width at half maximum of 16 nm, and a long lifetime of 250 h. We chose 6,12-bis[6-trimethylphenylamino-5-trimethylphenylamino] pyrene (Bmpac) as the comparison material due to its similar structure to DITBDAP. The DITBDAP-based bottom-emitting OLED showed a better performance compared to that of the Bmpac-based OLED, with the T95 lifetime (time to 95% of the initial luminance of 3000 cd m-2) of 250 h, which was more than twice that of the Bmpac-based OLED. In addition, the efficiency roll-off was extremely low at high brightness, which were 1% at 1100 cd m-2 and 5% at 3200 cd m-2. The synthesized DITBDAP has realized highly efficient and long-lifetime deep-blue OLEDs with the EQE up to 20.6% and CIEy as low as 0.04. In the experiment, the researchers used many compounds, for example, Dipyrazino[2,3-f:2′,3′-h]quinoxaline-2,3,6,7,10,11-hexacarbonitrile (cas: 105598-27-4COA of Formula: C18N12).
Dipyrazino[2,3-f:2′,3′-h]quinoxaline-2,3,6,7,10,11-hexacarbonitrile (cas: 105598-27-4) belongs to quinoxaline derivatives. Condensed heterocycles of quinoxalines have become attractive targets in synthetic and medicinal chemistry due to their significant biological activities. Quinoxaline-1,4-di-N-oxide derivatives have shown to improve the biological results and are endowed with anti-viral, anti-cancer, anti-bacterial, and anti-protozoal activities with application in many other therapeutic areas.COA of Formula: C18N12
Referemce:
Quinoxaline – Wikipedia,
Quinoxaline | C8H6N2 | ChemSpider