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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Tabachnyk, M.
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (10/10 displayed)
- 2017High Open-Circuit Voltages in Tin-Rich Low-Bandgap Perovskite-Based Planar Heterojunction Photovoltaicscitations
- 2017Vibronically coherent ultrafast triplet-pair formation and subsequent thermally activated dissociation control efficient endothermic singlet fissioncitations
- 2017A Silicon-Singlet Fission Tandem Solar Cell Exceeding 100% External Quantum Efficiency with High Spectral Stabilitycitations
- 2017Photon Reabsorption in Mixed CsPbCl$_{3}$:CsPbI$_{3}$ Perovskite Nanocrystal Films for Light-Emitting Diodes
- 2016Enhancing photoluminescence yields in lead halide perovskites by photon recycling and light out-couplingcitations
- 2016Synthesis and Optical Properties of Lead-Free Cesium Tin Halide Perovskite Nanocrystalscitations
- 2016Efficient singlet exciton fission in pentacene prepared from a soluble precursorcitations
- 2015Solution-processable singlet fission photovoltaic devicescitations
- 2014Resonant energy transfer of triplet excitons from pentacene to PbSe nanocrystalscitations
- 2013Triplet diffusion in singlet exciton fission sensitized pentacene solar cellscitations
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article
Photon Reabsorption in Mixed CsPbCl$_{3}$:CsPbI$_{3}$ Perovskite Nanocrystal Films for Light-Emitting Diodes
Abstract
Cesium lead halide nanocrystals, CsPbX$_{3}$ (X = Cl, Br, I), exhibit photoluminescence quantum efficiencies approaching 100% without the core-shell structures usually used in conventional semiconductor nanocrystals. These high photoluminescence efficiencies make these crystals ideal candidates for light-emitting diodes (LEDs). However, because of the large surface area to volume ratio, halogen exchange between perovskite nanocrystals of different compositions occurs rapidly, which is one of the limiting factors for white-light applications requiring a mixture of different crystal compositions to achieve a broad emission spectrum. Here, we use mixtures of chloride and iodide CsPbX$_{3}$ (X = Cl, I) perovskite nanocrystals where anion exchange is significantly reduced. We investigate samples containing mixtures of perovskite nanocrystals with different compositions and study the resulting optical and electrical interactions. We report excitation transfer from CsPbCl$_{3}$ to CsPbI$_{3}$ in solution and within a poly(methyl methacrylate) matrix via photon reabsorption, which also occurs in electrically excited crystals in bulk heterojunction LEDs.