Bright triplet excitons in caesium lead halide perovskites

Michael Becker,Roman Vaxenburg,Georgian Nedelcu,Peter C. Sercel,Andrew Shabaev,Michael J. Mehl,John G. Michopoulos,Samuel G. Lambrakos,Noam Bernstein,John L. Lyons,Thilo Stöferle,Rainer F. Mahrt,Maksym V. Kovalenko,David J. Norris,Gabriele Rainò,Alexander L. Efros

Bright triplet excitons in caesium lead halide perovskites

2018

Michael Becker
Roman Vaxenburg
Georgian Nedelcu
Peter C. Sercel
Andrew Shabaev
Michael J. Mehl
John G. Michopoulos
Samuel G. Lambrakos
Noam Bernstein
John L. Lyons
Thilo Stöferle
Rainer F. Mahrt
Maksym V. Kovalenko
David J. Norris
Gabriele Rainò
Alexander L. Efros

The lowest-energy exciton state in caesium lead halide perovskite nanocrystals is shown to be a bright triplet state, contrary to expectations that lowest-energy excitons should always be dark.

Keywords:

Perovskite (structure)
Nanocrystal
Triplet state
Exciton
Perovskite
Caesium
Photochemistry
Materials science
Halide
Rashba effect
Molecular physics
Photon
Semiconductor

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