tert-Butylated spirofluorene derivatives with arylamine groups for highly efficient blue organic light emitting diodes
Lee, K; Kim, S; You, J; Kang, S; Lee, J; Yook, K; Jeon, SOk; Lee, J; Yoon, S
| HERO ID | 3576410 |
|---|---|
| In Press | No |
| Year | 2012 |
| Title | tert-Butylated spirofluorene derivatives with arylamine groups for highly efficient blue organic light emitting diodes |
| Authors | Lee, K; Kim, S; You, J; Kang, S; Lee, J; Yook, K; Jeon, SOk; Lee, J; Yoon, S |
| Journal | Journal of Materials Chemistry |
| Volume | 22 |
| Issue | 11 |
| Page Numbers | 5145-5154 |
| Abstract | A series of tert-butylated spirofluorene derivatives incorporating a diphenylaminoaryl-vinyl group was synthesized via the Horner-Wadsworth-Emmons olefination and a Suzuki cross-coupling reaction. To examine the electroluminescent properties of these materials, multilayered OLEDs were fabricated into the following device structure: ITO/DNTPD/NPB/MADN: blue dopant materials 1-14/Alq(3)/Liq/Al. All devices showed efficient blue emission. In particular, one device exhibited highly efficient sky blue emission with a maximum luminance of 25 100 cd m(-2) at 8.5 V, as well as luminous, power and external quantum efficiencies of 9.5 cd A(-1), 5.1 lm W-1 and 6.7% at 20 mA cm(-2), respectively. The peak wavelength of electroluminescence was 458 and 484 nm with CIEx,y coordinates of (0.14, 0.21) at 8.0 V. In addition, a deep blue device with CIEx,y coordinates of (0.15, 0.15) at 8.0 V showed a luminous efficiency and external quantum efficiency of 3.8 cd A(-1) and 3.3% at 20 mA cm(-2), respectively. |
| Doi | 10.1039/c2jm14869b |
| Wosid | WOS:000300571400082 |
| Url | <Go to ISI>://WOS:000300571400082 |
| Is Certified Translation | No |
| Dupe Override | No |
| Is Public | Yes |