A comprehensive study of the optical properties of CsPbBr₃ perovskite multiple quantum wells (MQW) with organic barrier layers is presented. Quantum confinement is observed by a blue-shift in absorption and emission spectra with decreasing well width and agrees well with simulations of the confinement energies. A large increase of emission intensity with thinner layers is observed, with a photoluminescence quantum yield up to 32 times higher than that of bulk layers. Amplified spontaneous emission (ASE) measurements show very low thresholds down to 7.3 μJ cm−² for a perovskite thickness of 8.7 nm, significantly lower than previously observed for CsPbBr₃ thin-films. With their increased photoluminescence efficiency and low ASE thresholds, MQW structures with CsPbBr₃ are excellent candidates for high-efficiency perovskite-based LEDs and lasers.
| Identifer | oai:union.ndltd.org:DRESDEN/oai:qucosa:de:qucosa:88276 |
| Date | 02 February 2024 |
| Creators | Antrack, Tobias, Kroll, Martin, Sudzius, Markas, Cho, Changsoon, Imbrasas, Paulius, Albaladejo-Siguan, Miguel, Benduhn, Johannes, Merten, Lena, Hinderhofer, Alexander, Schreiber, Frank, Reineke, Sebastian, Vaynzof, Yana, Leo, Karl |
| Publisher | Wiley-VCH |
| Source Sets | Hochschulschriftenserver (HSSS) der SLUB Dresden |
| Language | English |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, doc-type:article, info:eu-repo/semantics/article, doc-type:Text |
| Rights | info:eu-repo/semantics/openAccess |
| Relation | 2198-3844, 2200379, 10.1002/advs.202200379, info:eu-repo/grantAgreement/Deutsche Forschungsgemeinschaft/SPP 2196: Perowskit-Halbleiter: Von fundamentalen Eigenschaften zur Anwendung/402726906//Perovskite Heterostructure Investigations using Vacuum Evaporation and X-ray diffraction |
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