Extraordinarily High Efficiency Improvement for OLEDs with High Surface-Charge Polymeric Nanodots
| العنوان: | Extraordinarily High Efficiency Improvement for OLEDs with High Surface-Charge Polymeric Nanodots |
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| المؤلفون: | I-Ming Lai, Chi-Ping Liu, Shih-Ming Shen, Mao-Feng Hsu, Jing-Jong Shyue, Sun-Zen Chen, Wei-Ben Wang, Po-Hsien Wu, Cheng-Chung Chen, Jwo-Huei Jou, Chuan-Huan Chiu |
| المصدر: | ACS Nano. 4:4054-4060 |
| بيانات النشر: | American Chemical Society (ACS), 2010. |
| سنة النشر: | 2010 |
| مصطلحات موضوعية: | Materials science, business.industry, General Engineering, General Physics and Astronomy, Charge (physics), Nanotechnology, Trapping, OLED, Optoelectronics, General Materials Science, Surface charge, Nanodot, business, Layer (electronics), Electrical efficiency, Diode |
| الوصف: | The efficiency of highly efficient blue, green, red, and white organic light-emitting diodes (OLEDs) has been substantially advanced through the use of high surface-charge nanodots embedded in a nonemissive layer. For example, the blue OLED's markedly high initial power efficiency of 18.0 lm W(-1) at 100 cd m(-2) was doubled to 35.8 lm W(-1) when an amino-functionalized polymeric nanodot was employed. At high luminance, such as 1000 cd m(-2) used for illumination applications, the efficiency was improved from 12.4 to 21.2 lm W(-1), showing a significant enhancement of 71%. The incorporated highly charged nanodots are capable of effectively modulating the transportation of holes via a blocking or trapping mechanism, preventing excessive holes from entering the emissive layer and the resulting carrier-injection imbalance. Furthermore, in the presence of a high-repelling or dragging field arising from the highly charged nanodots, only those holes with sufficient energy are able to overcome the included barriers, causing them to penetrate deeper into the emissive layer. This penetration leads to carrier recombination over a wider region and results in a brighter emission and, therefore, higher efficiency. |
| تدمد: | 1936-086X 1936-0851 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f9c3dfa27359e04b8bcc5ac1c6838307 https://doi.org/10.1021/nn100357m |
| رقم الأكسشن: | edsair.doi.dedup.....f9c3dfa27359e04b8bcc5ac1c6838307 |
| قاعدة البيانات: | OpenAIRE |
Find this issue from the American Chemical Society | تدمد: | 1936086X 19360851 |
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