White light-emitting devices with a single emitting layer based on bisindolylmaleimide fluorophores
Lin, Z; Wen, YuhS; Chow, TJ
| HERO ID | 3576577 |
|---|---|
| In Press | No |
| Year | 2009 |
| Title | White light-emitting devices with a single emitting layer based on bisindolylmaleimide fluorophores |
| Authors | Lin, Z; Wen, YuhS; Chow, TJ |
| Journal | Journal of Materials Chemistry |
| Volume | 19 |
| Issue | 29 |
| Page Numbers | 5141-5148 |
| Abstract | A series of bisindolylmaleimide dyes (1-3) were synthesized and they exhibited intensive orange to red color luminance deriving from charge transfer transitions. Highly efficient light-emitting devices were fabricated using these materials as emitters by doping 1% in a tris(8-hydroxyquinolinato)aluminium (Alq(3)) host, which performed in a quantum efficiency of similar to 4% with a maximal intensity >40 000 cd/m(2). Broad band white emission can be produced by combining their reddish color with another blue emitter. While doped in 4,4'-bis[N-(1-naphthyl)-N-phenylamino]biphenyl (NPB) in suitable concentrations, dual emission was obtained from a single layer. The device with configuration ITO/PEDOT: PSS/dye 1 (1%): NPB/TPBI/LiF/Al yielded white light with maximum luminance efficiency of 6.6 cd/A, power efficiency of 6.4 lm/W and quantum efficiency of 2.6%, where PEDOT: PSS is poly(ethylenedioxythiophene): poly(styrenesulfonic acid), and TPBI is 2,2',2 ''-(1,3,5-benzentriyl)tris(1-phenyl-1H-benzimidazole). This device can be turned on at a low voltage (< 3 V) and emits a white color with CIE coordinate (0.32, 0.34), which stays invariant over a wide range of applied voltage. |
| Doi | 10.1039/b901627a |
| Wosid | WOS:000267981100008 |
| Is Certified Translation | No |
| Dupe Override | No |
| Is Public | Yes |