Ссылки

DOI

  • Danila A. Tatarinov
  • Ivan D. Skurlov
  • Anastasiia V. Sokolova
  • Alexander A. Shimko
  • Denis V. Danilov
  • Yuliya A. Timkina
  • Maxim A. Rider
  • Viktor V. Zakharov
  • Sergey A. Cherevkov
  • Natalya K. Kuzmenko
  • Aleksandra V. Koroleva
  • Evgeniy V. Zhizhin
  • Ekaterina Yu. Stovpiaga
  • Dmitry A. Kurdyukov
  • Valery G. Golubev
  • Xiaoyu Zhang
  • Weitao Zheng
  • Anton N. Tcypkin
  • Aleksandr P. Litvin
  • Andrey L. Rogach
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.
Язык оригиналаанглийский
Страницы (с-по)9011-9020
Число страниц10
ЖурналNanoscale
Том16
Номер выпуска18
DOI
СостояниеОпубликовано - 10 апр 2024

ID: 119488437