Effect of multi-interface patterns on the light-outcoupling of perovskite light-emitting diodes
| Autor: | Zong-Tao Li, Jia-Yong Qiu, Jia-Sheng Li, Xue-Wei Du, Ze-Long Li, Hong-Wei Zhang |
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| Rok vydání: | 2023 |
| Předmět: | |
| Zdroj: | Applied Physics Letters. 122:021106 |
| ISSN: | 1077-3118 0003-6951 |
| DOI: | 10.1063/5.0133472 |
| Popis: | Patterned structures in perovskite light-emitting diodes (PeLEDs) contribute to improved external quantum efficiency; however, unsatisfactory light outcoupling resulting from multi-interface optical loss remains a primary and unsolved challenge. This study investigated the effect of multi-interface patterns on the light outcoupling of PeLEDs using a SiO2-microcolumn pattern (SMP). It was found that the optical loss of PeLEDs decreased as the number of patterned interfaces increased. This was attributed to the strong scattering effect and the utilization of waveguide and surface plasmon polariton modes at the bottom interface and the electron transmission layer of the top electrode. A PeLED with a five-interface structure based on an SMP substrate was prepared to verify the improved light outcoupling, indicating that a synergistic design in light coupling and perovskite film formation should be considered to fabricate efficient devices with multi-interface patterns. |
| Databáze: | OpenAIRE |
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