ArticleScience advances2023
Uncovering the mechanisms of efficient upconversion in two-dimensional perovskites with anti-Stokes shift up to 220 meV.
Article in Science advances, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers.
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Who cites it
11 citing papers in PubMed.
- Engineering Polarons for Circumventing Energy Gap Law: Nd-doped CdTe Quantum Dots With High-efficiency Emission at 1730 nm for NIR-IIb/c Bioimaging.Advanced materials (Deerfield Beach, Fla.) · 2026Article
- Dynamic lattice disorder overrides energetics for barrierless interfacial charge transfer in 2D hybrid perovskites.Science advances · 2026Article
- Regulating Pb off-centering distortion for white-light emission in 2D halide perovskites.Nature communications · 2026Article
- Giant single-step upconversion via sub-35-fs phonon dynamics in the nonlinear optical regime.Science advances · 2025Article
- Efficient up-conversion in CsPbBrNature communications · 2025Article
- Giant deformation potential induced small polaron effect in Dion-Jacobson two-dimensional lead halide perovskites.National science review · 2025Article
- Extreme Electron-Photon Interaction in Disordered Perovskites.Advanced science (Weinheim, Baden-Wurttemberg, Germany) · 2025Article
- Band Gap Narrowing in Lead-Halide Perovskites by Dynamic Defect Self-Doping for Enhanced Light Absorption and Energy Upconversion.Chemistry of materials : a publication of the American Chemical Society · 2025Article
- Photon Upconversion of Defect-Bound Excitons in hBN-Encapsulated MoSThe journal of physical chemistry. C, Nanomaterials and interfaces · 2024Article
- Uncovering upconversion photoluminescence in layered PbIScientific reports · 2024Article
- Interplay of Phonon Directionality and Emission Polarization in Two-Dimensional Layered Metal Halide Perovskites.Accounts of chemical research · 2024Article
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Authors and funding
12 authors.
Funding
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Abstract
Phonon-assisted photon upconversion holds great potential for numerous applications, e.g., optical refrigeration. However, traditional semiconductors face energy gain limitations due to thermal energy, typically achieving only ~25 milli-electron volts at room temperature. Here, we demonstrate that quasi-two-dimensional perovskites, with a soft hybrid organic-inorganic lattice, can efficiently upconvert photons with an anti-Stokes shift exceeding 200 milli-electron volts. By using microscopic transient absorption measurements and density functional theory calculations, we explicate that the giant energy gain stems from strong lattice fluctuation leading to a picosecond timescale transient band energy renormalization with a large energy variation of around ±180 milli-electron volts at room temperature. The motion of organic molecules drives the deformation of inorganic framework, providing energy and local states necessary for efficient upconversion within a time constant of around 1 ps. These results establish a deep understanding of perovskite-based photon upconversion and offer previously unknown insights into the development of various upconversion applications.
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