Academic Journal
High efficiency blue organic light-emitting diodes with below-bandgap electroluminescence
| العنوان: | High efficiency blue organic light-emitting diodes with below-bandgap electroluminescence |
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| المؤلفون: | Vasilopoulou, Maria, Mohd Yusoff, Abd. Rashid bin, Daboczi, Matyas, Conforto, Julio, Gavim, Anderson Emanuel Ximim, da Silva, Wilson Jose, Macedo, Andreia Gerniski, Soultati, Anastasia, Pistolis, George, Schneider, Fabio Kurt, Dong, Yifan, Jacoutot, Polina, Rotas, Georgios, Jang, Jin, Vougioukalakis, Georgios C., Chochos, Christos L., Kim, Ji-Seon, Gasparini, Nicola |
| المصدر: | Nature Communications ; volume 12, issue 1 ; ISSN 2041-1723 |
| بيانات النشر: | Springer Science and Business Media LLC |
| سنة النشر: | 2021 |
| الوصف: | Blue organic light-emitting diodes require high triplet interlayer materials, which induce large energetic barriers at the interfaces resulting in high device voltages and reduced efficiencies. Here, we alleviate this issue by designing a low triplet energy hole transporting interlayer with high mobility, combined with an interface exciplex that confines excitons at the emissive layer/electron transporting material interface. As a result, blue thermally activated delay fluorescent organic light-emitting diodes with a below-bandgap turn-on voltage of 2.5 V and an external quantum efficiency (EQE) of 41.2% were successfully fabricated. These devices also showed suppressed efficiency roll-off maintaining an EQE of 34.8% at 1000 cd m −2 . Our approach paves the way for further progress through exploring alternative device engineering approaches instead of only focusing on the demanding synthesis of organic compounds with complex structures. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| DOI: | 10.1038/s41467-021-25135-z |
| الاتاحة: | http://dx.doi.org/10.1038/s41467-021-25135-z https://www.nature.com/articles/s41467-021-25135-z.pdf https://www.nature.com/articles/s41467-021-25135-z |
| Rights: | https://creativecommons.org/licenses/by/4.0 ; https://creativecommons.org/licenses/by/4.0 |
| رقم الانضمام: | edsbas.D83F26F6 |
| قاعدة البيانات: | BASE |
| DOI: | 10.1038/s41467-021-25135-z |
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