New Hole Transporting Materials Based on Di- and Tetra-Substituted Biphenyl Derivatives for Organic Light-Emitting Diodes
Kim, SH; Shin, C; Park, YIl; Park, JW; Kim, , SR; Chung, M; Lee, JiH
| HERO ID | 3576365 |
|---|---|
| In Press | No |
| Year | 2008 |
| Title | New Hole Transporting Materials Based on Di- and Tetra-Substituted Biphenyl Derivatives for Organic Light-Emitting Diodes |
| Authors | Kim, SH; Shin, C; Park, YIl; Park, JW; Kim, , SR; Chung, M; Lee, JiH |
| Journal | Journal of Nanoscience and Nanotechnology |
| Volume | 8 |
| Issue | 10 |
| Page Numbers | 5123-5129 |
| Abstract | This study aimed to synthesize novel hole transporting materials (HTMs) with biphenyl derivatives that are di- or tetra-substituted with naphthylphenyl amine groups and/or methoxy groups, and to examine systematically the variations of the properties of the HTMs with the number and location of the substituents. The tetranaphthylphenyl amine-substituted biphenyl-based HTMs T1N and T2N were observed to have better thermal properties than the commercial HTM NPB, with decomposition temperatures above 500 degrees C, and a 10 degrees C higher T(g). In EL devices with ITO/2-TNATA-(60 nm)/HTM(15 nm)/Alq(3)(70 nm)/LiF(1 nm)/Al structures, the disubstituted biphenyl-based HTMs with an asymmetric molecular structure D1N and D2N were found to have inferior luminescence efficiencies when compared to NPB, which has a symmetric molecular structure. However, M1N, which is substituted with a further two methoxy groups, was found to exhibit excellent luminance and power efficiencies, 4.88 cd/A and 1.36 lm/W respectively at 100 mA/cm(2), which are higher by about 147% and 127% respectively than those of NPB (3.30 cd/A and 1.07 lm/W at 100 mA/cm(2)), due to better charge balance. |
| Doi | 10.1166/jnn.2008.1114 |
| Pmid | 19198404 |
| Wosid | WOS:000261390500044 |
| Is Certified Translation | No |
| Dupe Override | No |
| Is Public | Yes |
| Language Text | English |
| Keyword | Hole-Transporting Materials; Tetra- or Disubstituted Biphenyl Derivatives |