| LIU Ya-dong,LI Ji-chao,ZHANG Jie,GUO Wang-jun,WU Zhi-sheng,MI Yu-hua,SONG Xin-chao.Efficient blue fluorescence tandem organic light emitting device with a novel intermediate connector[J].Optoelectronics Letters,2019,15(2):85-88 |
| Efficient blue fluorescence tandem organic light emitting device with a novel intermediate connector |
| Author Name | Affiliation | | LIU Ya-dong | Xi’an Modern Chemistry Research Institute, Xi’an 710065, China | | LI Ji-chao | Xi’an Modern Chemistry Research Institute, Xi’an 710065, China | | ZHANG Jie | Xi’an Modern Chemistry Research Institute, Xi’an 710065, China | | GUO Wang-jun | Xi’an Modern Chemistry Research Institute, Xi’an 710065, China | | WU Zhi-sheng | Xi’an Modern Chemistry Research Institute, Xi’an 710065, China | | MI Yu-hua | Xi’an Modern Chemistry Research Institute, Xi’an 710065, China | | SONG Xin-chao | Xi’an Modern Chemistry Research Institute, Xi’an 710065, China |
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| Abstract: |
| A novel intermediate connector (IC) was formed which was composed of aluminum (Al, 3 nm)/1,4,5,8,9,11- hexaazatriphenylene-hexacarbonitrile (HAT-CN). The 3-nm-thick Al in the IC is certified to efficiently generate intrinsic charge carriers, and the HAT-CN is proved to work as the holes injection layer (HIL) for the corresponding electroluminescent (EL) unit simultaneously. This simply IC comprehensively takes advantage of the features of the HAT-CN so as to stack two single EL units without introducing extra material. In addition to a significant enhancement in luminance and current efficiency, a current efficiency (CE) of 10.2 cd/A and a luminance of 2 042 cd/m2 under the current density 20 mA/cm2 of this tandem organic light emitting device (TOLED) are yielded, which are notably almost the sum of that of the two single-unit devices. |
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