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Photochemie In der Zuschrift auf S. 144 berichten Nobuo Kimizuka, Nobuhiro Yanai et al. über die Entdeckung eines Naphthalin‐Derivats für die effiziente Vis‐zu‐UV‐Upconversion unter Sonnenlicht.
While many studies have been done on triplet–triplet annihilation‐based photon upconversion (TTA‐UC) to produce visible light with high efficiency, the efficient TTA‐UC from visible to UV light, despite its importance for a variety of solar and indoor applications, remains a challenging task. Here, we report the highest visible‐to‐UV TTA‐UC efficiency of 20.5 % based on the discovery of an excellent...
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