Efficient and Bright Deep-Red Light-Emitting Diodes based on a Lateral 0D/3D Perovskite Heterostructure

© 2023 Wiley‐VCH GmbH.

Bibliographische Detailangaben
Veröffentlicht in:Advanced materials (Deerfield Beach, Fla.). - 1998. - 36(2024), 20 vom: 21. Mai, Seite e2207301
1. Verfasser: Ke, You (VerfasserIn)
Weitere Verfasser: Guo, Jingshu, Kong, Decheng, Wang, Jingmin, Kusch, Gunnar, Lin, Chen, Liu, Dawei, Kuang, Zhiyuan, Qian, Dongmin, Zhou, Fuyi, Zhang, Guangbin, Niu, Meiling, Cao, Yu, Oliver, Rachel A, Dai, Daoxin, Jin, Yizheng, Wang, Nana, Huang, Wei, Wang, Jianpu
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2024
Zugriff auf das übergeordnete Werk:Advanced materials (Deerfield Beach, Fla.)
Schlagworte:Journal Article 0D/3D perovskite heterostructure deep‐red perovskite light‐emitting diodes efficiency oximeters
Beschreibung
Zusammenfassung:© 2023 Wiley‐VCH GmbH.
Bright and efficient deep-red light-emitting diodes (LEDs) are important for applications in medical therapy and biological imaging due to the high penetration of deep-red photons into human tissues. Metal-halide perovskites have potential to achieve bright and efficient electroluminescence due to their favorable optoelectronic properties. However, efficient and bright perovskite-based deep-red LEDs have not been achieved yet, due to either Auger recombination in low-dimensional perovskites or trap-assisted nonradiative recombination in 3D perovskites. Here, a lateral Cs4PbI6/FAxCs1- xPbI3 (0D/3D) heterostructure that can enable efficient deep-red perovskite LEDs at very high brightness is demonstrated. The Cs4PbI6 can facilitate the growth of low-defect FAxCs1- xPbI3, and act as low-refractive-index grids, which can simultaneously reduce nonradiative recombination and enhance light extraction. This device reaches a peak external quantum efficiency of 21.0% at a photon flux of 1.75 × 1021 m-2 s-1, which is almost two orders of magnitude higher than that of reported high-efficiency deep-red perovskite LEDs. Theses LEDs are suitable for pulse oximeters, showing an error <2% of blood oxygen saturation compared with commercial oximeters
Beschreibung:Date Revised 16.05.2024
published: Print-Electronic
Citation Status PubMed-not-MEDLINE
ISSN:1521-4095
DOI:10.1002/adma.202207301