Efficient Energy Funneling in Quasi-2D Perovskites From Light Emission to Lasing

Efficient Energy Funneling in Quasi-2D Perovskites : From Light Emission to Lasing

© 2020 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Détails bibliographiques
Publié dans:Advanced materials (Deerfield Beach, Fla.). - 1998. - 32(2020), 16 vom: 15. Apr., Seite e1906571
Auteur principal: Lei, Lei (Auteur)
Autres auteurs: Seyitliyev, Dovletgeldi, Stuard, Samuel, Mendes, Juliana, Dong, Qi, Fu, Xiangyu, Chen, Yi-An, He, Siliang, Yi, Xueping, Zhu, Liping, Chang, Chih-Hao, Ade, Harald, Gundogdu, Kenan, So, Franky
Format: Article en ligne
Langue:English
Publié: 2020
Accès à la collection:Advanced materials (Deerfield Beach, Fla.)
Sujets:Journal Article amplified spontaneous emission distributed-feedback lasers energy funneling light-emitting diodes quasi-2D perovskites
Description
Résumé:© 2020 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
Quasi-2D Ruddlesden-Popper halide perovskites with a large exciton binding energy, self-assembled quantum wells, and high quantum yield draw attention for optoelectronic device applications. Thin films of these quasi-2D perovskites consist of a mixture of domains having different dimensionality, allowing energy funneling from lower-dimensional nanosheets (high-bandgap domains) to 3D nanocrystals (low-bandgap domains). High-quality quasi-2D perovskite (PEA)2 (FA)3 Pb4 Br13 films are fabricated by solution engineering. Grazing-incidence wide-angle X-ray scattering measurements are conducted to study the crystal orientation, and transient absorption spectroscopy measurements are conducted to study the charge-carrier dynamics. These data show that highly oriented 2D crystal films have a faster energy transfer from the high-bandgap domains to the low-bandgap domains (<0.5 ps) compared to the randomly oriented films. High-performance light-emitting diodes can be realized with these highly oriented 2D films. Finally, amplified spontaneous emission with a low threshold 4.16 µJ cm-2 is achieved and distributed feedback lasers are also demonstrated. These results show that it is important to control the morphology of the quasi-2D films to achieve efficient energy transfer, which is a critical requirement for light-emitting devices
Description:Date Revised 30.09.2020
published: Print-Electronic
Citation Status PubMed-not-MEDLINE
ISSN:1521-4095
DOI:10.1002/adma.201906571