Issue 8, 2022

High photoluminescence quantum yield near-infrared emission from a lead-free ytterbium-doped double perovskite

Abstract

When excited by photons with energies greater than 2.2 eV, the bandgap energy, Yb-doped Cs2AgBiBr6 thin films synthesized via physical vapor deposition emit strong near-infrared luminescence centered at ∼1.24 eV via the Yb3+ 2F5/22F7/2 electronic transition. Robust, reproducible, and stable photoluminescence quantum yields (PLQY) as high as 82.5% are achieved with Cs2AgBiBr6 films doped with 8% Yb. This high PLQY indicates facile and efficient energy transfer from the perovskite host, Cs2AgBiBr6, to Yb, making Cs2AgBiBr6 the most promising lead-free down-conversion material.

Graphical abstract: High photoluminescence quantum yield near-infrared emission from a lead-free ytterbium-doped double perovskite

Supplementary files

Article information

Article type
Communication
Submitted
18 Apr 2022
Accepted
06 Jun 2022
First published
13 Jun 2022

Mater. Horiz., 2022,9, 2191-2197

Author version available

High photoluminescence quantum yield near-infrared emission from a lead-free ytterbium-doped double perovskite

M. N. Tran, I. J. Cleveland, J. R. Geniesse and E. S. Aydil, Mater. Horiz., 2022, 9, 2191 DOI: 10.1039/D2MH00483F

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