Abstract
Perovskite light-emitting diodes are promising for next-generation lighting and displays. However, the nature of how excitons affect performance is still not clear in perovskite and quasi-two-dimensional (2D) perovskite-based devices. Here, we show that triplet excitons are key to efficient emission in green quasi-2D perovskite devices and that quenching of triplets by the organic cation is a major loss path. Employing an organic cation with a high triplet energy level (phenylethylammonium) in a quasi-2D perovskite based on formamidinium lead bromide yields efficient harvesting of triplets. Furthermore, we show that upconversion of triplets to singlets can occur, making 100% harvesting of electrically generated excitons potentially possible.
Original language | English |
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Pages (from-to) | 385-387 |
Number of pages | 3 |
Journal | Proceedings of the International Display Workshops |
Volume | 27 |
Publication status | Published - Dec 9 2021 |
Event | 27th International Display Workshops, IDW 2020 - Virtual, Online Duration: Dec 9 2020 → Dec 11 2020 |
All Science Journal Classification (ASJC) codes
- Computer Vision and Pattern Recognition
- Human-Computer Interaction
- Electrical and Electronic Engineering
- Electronic, Optical and Magnetic Materials