Heavy metal-free visible-to-UV photon upconversion with over 20% efficiency sensitized by a ketocoumarin derivative
Masanori Uji, Naoyuki Harada, Nobuo Kimizuka, Masaki Saigo, Kiyoshi Miyata, Ken Onda, Nobuhiro Yanai
Abstract
The highest efficiency of heavy metal-free visible-to-UV photon upconversion is achieved by employing a ketocoumarin sensitizer with strong visible absorption, weak UV absorption, and high intersystem crossing efficiency.
Topics & Concepts
Photon upconversionIntersystem crossingMaterials sciencePhotochemistryAbsorption (acoustics)Visible spectrumMetalPhotonOptoelectronicsDerivative (finance)OpticsAtomic physicsChemistryDopingPhysicsExcited stateComposite materialMetallurgyFinancial economicsEconomicsSinglet stateLuminescence and Fluorescent MaterialsPerovskite Materials and ApplicationsNanoplatforms for cancer theranostics