Visible-to-infrared quantum cutting by phonon-assisted energy transfer in YPO4:Tm3+, Yb3+ phosphors

文献情報

出版日 2012-03-05

DOI 10.1039/C2CP24044K

インパクトファクター 3.676

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要旨

Quantum cutting (QC) of one visible photon into two infrared ones has been reported for the lanthanide ion couple (Tm3+, Yb3+) in a variety of host lattices. The mechanism responsible for QC was assumed to be a cooperative energy transfer (ET) process from Tm3+ to two Yb3+ ions, however, no solid evidence was presented. Herein we report visible-to-infrared QC for (Tm3+, Yb3+) in YPO4 phosphors. The ET process from the excited 1G4 level of Tm3+ to Yb3+ was investigated in detail by means of optical spectroscopy. By monitoring the steady-state photoluminescence (PL) and PL decay of the intermediate 3F4 level of Tm3+ as a function of the Yb3+ concentration, we demonstrated the QC of one incident blue photon into one near-infrared emitting photon at 1004 nm from Yb3+ and simultaneously into one mid-infrared emitting photon at 1791 nm from Tm3+, rather than two emitting photons from Yb3+. It was revealed that such visible-to-infrared QC was induced by phonon-assisted ET instead of cooperative ET as previously reported. This kind of QC phosphors may have potential as solar spectral converters to enhance the external quantum efficiency in multi-junction solar cells based on narrow band-gap semiconductors such as Ge, PbS or In1−xGaxN.

掲載誌

Physical Chemistry Chemical Physics

CiteScore: 5.5

自己引用率: 10.3%

年間論文数: 3036

Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.