Near-infrared two-photon excited photoluminescence from Yb3+-doped CsPbClxBr3−x perovskite nanocrystals embedded into amphiphilic silica microspheres
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review
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Original language | English |
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Pages (from-to) | 9011-9020 |
Journal / Publication | Nanoscale |
Volume | 16 |
Issue number | 18 |
Online published | 10 Apr 2024 |
Publication status | Published - 14 May 2024 |
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Abstract
Nonlinear absorption of metal-halide perovskite nanocrystals (NCs) makes them an ideal candidate for applications which require multiphoton-excited photoluminescence. By doping perovskite NCs with lanthanides, their emission can be extended into the near-infrared (NIR) spectral region. We demonstrate how the combination of Yb3+ doping and bandgap engineering of cesium lead halide perovskite NCs performed by anion exchange (from Cl− to Br−) leads to efficient and tunable emitters that operate under two-photon excitation in the NIR spectral region. By optimizing the anion composition, Yb3+-doped CsPbClxBr3−x NCs exhibited high values of two-photon absorption cross-section reaching 2.3 × 105 GM, and displayed dual-band emission located both in the visible (407-493 nm) and NIR (985 nm). With a view of practical applications of bio-visualisation in the NIR spectral range, these NCs were embedded into silica microspheres which were further wrapped with amphiphilic polymer shells to ensure their water-compatibility. The resulting microspheres with embedded NCs could be easily dispersed in both toluene and water, while still exhibiting a dual-band emission in visible and NIR under both one- and two-photon excitation conditions. © The Royal Society of Chemistry 2024.
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Citation Format(s)
Near-infrared two-photon excited photoluminescence from Yb3+-doped CsPbClxBr3−x perovskite nanocrystals embedded into amphiphilic silica microspheres. / Tatarinov, Danila A.; Skurlov, Ivan D.; Sokolova, Anastasiia V. et al.
In: Nanoscale, Vol. 16, No. 18, 14.05.2024, p. 9011-9020.
In: Nanoscale, Vol. 16, No. 18, 14.05.2024, p. 9011-9020.
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review