200052-70-6Relevant articles and documents
An efficient red organic light-emitting diode using DCJTB type emitters based on silicone-containing julolidine derivatives
Lee, Kum Hee,Oh, Su Hyun,Park, Min Hye,Kim, Young Kwan,Yoon, Seung Soo
, p. 270 - 277 (2011)
This paper reports the synthesis and electroluminescent properties of new red fluorescent materials, 4-(dicyanomethylene)-2-(1,1-dimethyl-7- trimethylsiliyl methyl-julolidyl-9-enyl)-6-(4-pentylbicyclo[2.2.2]octan-1-yl)- 4H-pyran (DCJTMS) and 4-(dicyanomethylene)-2-(1,7-bistrimethylsiliylmethyl- julolidyl-9-enyl)-6-(4- pentylbicyclo[2.2.2]octan-1-yl)-4H-pyran (DCJDTMS). In these red emitters, the bulky groups such as trimethylsilane and n-pentyl-bicyclo[2,2,2]octane were introduced into and 4-(dicyanomethylene)-2- methyl-6-[p-(dimethylamino)-styryl]-4Hpyran (DCM) skeleton to increase the steric hindrance between the red emitters and prevent concentration quenching. An OLED device using 4-(dicyanomethylene)-2-(1,7- bis(trimethylsiliylmethyl)- julolidyl-9-enyl)-6-(4-pentylbicyclo[2.2.2]octan-1-yl)-4Hpyran (DCJDTMS) as a dopant exhibited the efficient red emission with a Luminous efficiency, Power efficiency and Commision Internationale De L'Eclairage (CIEx,y) coordinates of 3.66 cd/A, 2.13 lm/W at 20 mA/cm2 and (0.62, 0.38) at 7.0 V, respectively. Compared to device using 4-(dicyanomethylene)-2-(1,1,7,7-tetra- methyljulolidyl- 9-enyl)-6-tert-butyl-4H-pyran (DCJTB), the red device using DCJDTMS showed the greatly improved EL efficiency due to the more bulky substituents of compound DCJDTMS. Copyright Taylor & Francis Group, LLC.
Red fluorescent DCM derivatives with the bulky-substituents on pyran and julolidine moieties for organic light-emitting diodes (OLEDs)
Lee, Kum Hee,Yoon, Seung Soo,Kim, Young Kwan
, p. 3433 - 3436,4 (2020/09/16)
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