Red Fluorescent 4-(Dicyanomethylene)-2-(1-pentylbicyclo[2,2,2]oct-4-yl)-6-(1,1,2,2,7,7-h examethyljulolidyl-9-enyl)-4H-pyran (DCHMJPB) for Organic Light-Emitting Diodes (OLEDs)
- Authors
- Kwon, Sung Min; Lee, Kum Hee; Kim, Young Kwan; Yoon, Seung Soo
- Issue Date
- 2012
- Publisher
- TAYLOR & FRANCIS LTD
- Keywords
- Red Fluorescence; OLED; Julolidine Derivative; DCJTB Derivative
- Citation
- MOLECULAR CRYSTALS AND LIQUID CRYSTALS, v.567, no.1, pp.207 - 213
- Journal Title
- MOLECULAR CRYSTALS AND LIQUID CRYSTALS
- Volume
- 567
- Number
- 1
- Start Page
- 207
- End Page
- 213
- URI
- https://scholarworks.bwise.kr/hongik/handle/2020.sw.hongik/18232
- DOI
- 10.1080/15421406.2012.703810
- ISSN
- 1542-1406
- Abstract
- An efficient red fluorescent compound, 4-(Dicyanomethylene)-2-(1-pentylbicyclo[2,2,2]oct-4-yl)-6-(1,1,2,2,7,7-hexamethyljulolidyl-9-enyl)-4H-pyran (DCHMJPB) containing two additional methyl groups on julolidine moiety and 1-pentylbicyclo[2,2,2]octyl group on pyran moiety, was synthesized and characterized. In this red emitter, the bulky groups such as two additional methyl groups and 1-pentylbicyclo[2,2,2]octyl group were introduced to increase the steric hindrance between the red emitters and prevent concentration quenching. In particular, in an efficient red device containing emitter DCHMJPB as a dopant, a luminous and power efficiency of 3.76 cd/A and 1.97 lm/W was achieved, respectively, at 20 mA/cm(2) with the CIE coordinates of (x = 0.56, y = 0.42) at 7.0V.
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