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What are the latest advances in photon upconversion? 


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Photon upconversion has seen significant advances in recent years. One area of progress is the use of triplet-triplet annihilation (TTA-UC) for upconverting low-energy photons to high-energy photons under low excitation intensity . This has shown great potential in various applications such as solar cells, photocatalysis, 3D printing, smart luminescence materials, and biological applications . Another area of advancement is the integration of semiconductor nanocrystals into existing upconversion platforms to address limitations and improve usability . Additionally, there has been development in upconversion platforms based entirely on semiconductor nanostructures, leveraging their size, shape, and composition-dependent optical properties . These advancements have the potential to improve upconversion efficiencies and expand the range of applications for photon upconversion .

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The latest advances in photon upconversion include the development of new chromophores that enable highly efficient conversion of low-intensity visible light into UV light.
The provided paper discusses the engineering of energy transfer processes in van der Waals heterostructures, specifically in a 2D inorganic-organic semiconductor heterostructure. It demonstrates photon upconversion through the rapid quenching of WSe2 emission and fluorescence from guest DBP molecules. However, it does not provide information on the latest advances in photon upconversion.
The paper discusses the recent advances in triplet-triplet annihilation upconversion (TTA-UC) in various applications, including solar cells, photocatalysis, smart luminescence materials, and biological applications. However, it does not specifically mention the latest advances in photon upconversion.
The paper discusses the recent development of upconversion platforms based on semiconductor nanostructures, which utilize the optical properties of semiconductors to design upconverting materials for specific applications.
The paper discusses three different upconversion technologies - two-photon absorption (TPA), upconversion nanoparticles (UCNPs), and triplet-triplet annihilation - that have been employed to assist the photopolymerization process in stereolithographic 3D printing.

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