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Harnessing charge and exciton distribution towards extremely high performance: the critical role of guests in single-emitting-layer white OLEDs
| Content Provider | Semantic Scholar |
|---|---|
| Author | Liu, Baiquan Wang, Lei Gao, Dongyu Xu, Miao Zhu, Xuhui Zou, Jianhua Lan, Linfeng Ning, Honglong Peng, Junbiao Cao, Yong Feng |
| Copyright Year | 2015 |
| Abstract | Currently, high efficiency, low efficiency roll-off and stable color white organic light-emitting diodes (WOLEDs) are still challenging to realize via simplified structures. Herein, the simplicity/extremely high efficiency/low efficiency roll-off/stable color trade-off has been accomplished in a single-emitting-layer (single-EML) phosphorescent WOLED. The WOLED exhibits total efficiencies of 111.7 cd A−1 and 75.5 lm W−1 at a practical luminance of 1000 cd m−2, these efficiencies are the highest among single-EML WOLEDs. Even at 5000 cd m−2, the efficiencies remain as high as 101.3 cd A−1 and 58.8 lm W−1. Besides, the color variation in the whole range of luminances is (0.00, 0.00), which is the first single-EML WOLED with an extremely stable color. The origin of the high performance is unveiled. Particularly, the role of guests, which is often ignored in single-EML WOLEDs, on the origin of the color-stability is systematically revealed and harnessing charge and exciton distribution by using multifunctional guests is demonstrated to be critical for stabilizing the color. Such marvelous results not only represent a significant step towards the realization of simplified WOLEDs, but also provide a new opportunity to achieve extremely stable colors [ΔCIE (Commission International de I'Eclairage) = (0.00, 0.00)]. |
| Starting Page | 536 |
| Ending Page | 544 |
| Page Count | 9 |
| File Format | PDF HTM / HTML |
| DOI | 10.1039/C5MH00051C |
| Volume Number | 2 |
| Alternate Webpage(s) | https://pubs.rsc.org/en/content/getauthorversionpdf/C5MH00051C |
| Alternate Webpage(s) | https://doi.org/10.1039/C5MH00051C |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
