High efficiency and durability from perovskite–organic hybrid light-emitting diodes

Toshinori Matsusima, Chuanjiang Qin, William J. Potscavage, Atula S.D. Sandanayaka, Matthew R. Leyden, Fatima Bencheikh, Kenichi Goushi, Fabrice Dominique Mathevet, Benoît Heinrich, Go Yumoto, Yoshihiko Kanemitsu, Chihaya Adachi

Research output: Contribution to journalConference articlepeer-review

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 languageEnglish
Pages (from-to)385-387
Number of pages3
JournalProceedings of the International Display Workshops
Volume27
Publication statusPublished - Dec 9 2021
Event27th International Display Workshops, IDW 2020 - Virtual, Online
Duration: Dec 9 2020Dec 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

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