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Area of Science:

  • Materials Science
  • Photochemistry
  • Solid-state Physics

Background:

  • Solid-state perovskite-sensitized photon upconversion is limited by the exclusive use of rubrene as an annihilator.
  • Energetic mismatch between perovskite sensitizers and rubrene restricts the achievable anti-Stokes shift.
  • Anthracene derivatives offer higher triplet energies, promising improved anti-Stokes shifts.

Purpose of the Study:

  • To investigate the universality of triplet sensitization in perovskite-sensitized photon upconversion.
  • To explore the use of anthracene derivatives for enhanced anti-Stokes shift in upconversion.
  • To compare upconversion efficiency using anthracene derivatives versus rubrene.

Main Methods:

  • Utilized formamidinium methylammonium lead triiodide (FA0.85MA0.15PbI3) as the perovskite sensitizer.
  • Employed 1-chloro-9,10-bis(phenylethynyl)anthracene as the triplet state annihilator.
  • Excited the system at 780 nm and analyzed upconverted emission at 550 nm.

Main Results:

  • Successfully demonstrated triplet state sensitization of 1-chloro-9,10-bis(phenylethynyl)anthracene by the perovskite sensitizer.
  • Achieved upconverted emission at 550 nm under 780 nm excitation, indicating a significant anti-Stokes shift.
  • Observed differences in upconversion processes when compared to rubrene as the annihilator.

Conclusions:

  • Triplet sensitization using perovskites is not limited to rubrene, showing broader applicability.
  • Anthracene derivatives enable a greater apparent anti-Stokes shift in perovskite-sensitized upconversion.
  • The study provides insights into optimizing photon upconversion processes for various applications.