Highly Emissive Self-Trapped Excitons in Fully Inorganic Zero-Dimensional Tin Halides

Bogdan M. Benin; Dmitry N. Dirin; Viktoriia Morad; Michael Wörle; Sergii Yakunin; Gabriele Rainò; Olga Nazarenko; Markus Fischer; Ivan Infante; Maksym V. Kovalenko

doi:10.1002/anie.201806452

Highly Emissive Self-Trapped Excitons in Fully Inorganic Zero-Dimensional Tin Halides

Bogdan M. Benin
, Dmitry N. Dirin
, Viktoriia Morad
, Michael Wörle
, Sergii Yakunin
, Gabriele Rainò
, Olga Nazarenko
, Markus Fischer
, Ivan Infante
, Maksym V. Kovalenko^*

^*Corresponding author for this work

AIMMS

Research output: Contribution to Journal › Article › Academic › peer-review

Abstract

The spatial localization of charge carriers to promote the formation of bound excitons and concomitantly enhance radiative recombination has long been a goal for luminescent semiconductors. Zero-dimensional materials structurally impose carrier localization and result in the formation of localized Frenkel excitons. Now the fully inorganic, perovskite-derived zero-dimensional Sn^II material Cs₄SnBr₆ is presented that exhibits room-temperature broad-band photoluminescence centered at 540 nm with a quantum yield (QY) of 15±5 %. A series of analogous compositions following the general formula Cs_4−xA_xSn(Br_1−yI_y)₆ (A=Rb, K; x≤1, y≤1) can be prepared. The emission of these materials ranges from 500 nm to 620 nm with the possibility to compositionally tune the Stokes shift and the self-trapped exciton emission bands.

Original language	English
Pages (from-to)	11329-11333
Number of pages	5
Journal	Angewandte Chemie. International Edition
Volume	57
Issue number	35
Early online date	12 Jul 2018
DOIs	https://doi.org/10.1002/anie.201806452
Publication status	Published - 27 Aug 2018

Funding

We thank Dr. F. Krumeich for EDS measurements and acknowledge the support of the Scientific Center for Optical and Electron Microscopy (ScopeM) of the Swiss Federal Institute of Technology ETHZ. We thank Michael Solar for single-crystal X-ray diffraction measurements. This work was financially supported by the European Union through the FP7 (ERC Starting Grant NANOSOLID, GA No. 306733) and through the Horizon-2020 (Marie-Skłodowska Curie ITN network PHONSI, H2020-MSCA-ITN-642656). Authors thank IBM-Zurich Research, in particular Dr. T. Stçferle and Dr. R. F. Mahrt, for support with low-temperature PL experiments. I.I. would like to thank The Netherlands Organization of Scientific Research (NWO) for providing financial support within the Innovational Research Incentive (Vidi) Scheme (Grant no. 723.013.002). DFT calculations were carried out on the Dutch national e-infrastructure with the support of SURF Cooperative.

Funders	Funder number
Seventh Framework Programme
Swiss Federal Institute of Technology ETHZ
IBM-Zurich
SURF Cooperative
European Research Council
NWO	723.013.002
Horizon 2020 Framework Programme	642656
European Commission	306733

Keywords

luminescence
perovskites
self-trapped excitons
solid-state synthesis
tin

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title = "Highly Emissive Self-Trapped Excitons in Fully Inorganic Zero-Dimensional Tin Halides",

abstract = "The spatial localization of charge carriers to promote the formation of bound excitons and concomitantly enhance radiative recombination has long been a goal for luminescent semiconductors. Zero-dimensional materials structurally impose carrier localization and result in the formation of localized Frenkel excitons. Now the fully inorganic, perovskite-derived zero-dimensional SnII material Cs4SnBr6 is presented that exhibits room-temperature broad-band photoluminescence centered at 540 nm with a quantum yield (QY) of 15±5 \%. A series of analogous compositions following the general formula Cs4−xAxSn(Br1−yIy)6 (A=Rb, K; x≤1, y≤1) can be prepared. The emission of these materials ranges from 500 nm to 620 nm with the possibility to compositionally tune the Stokes shift and the self-trapped exciton emission bands.",

keywords = "luminescence, perovskites, self-trapped excitons, solid-state synthesis, tin",

author = "Benin, \{Bogdan M.\} and Dirin, \{Dmitry N.\} and Viktoriia Morad and Michael W{\"o}rle and Sergii Yakunin and Gabriele Rain{\`o} and Olga Nazarenko and Markus Fischer and Ivan Infante and Kovalenko, \{Maksym V.\}",

year = "2018",

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doi = "10.1002/anie.201806452",

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T1 - Highly Emissive Self-Trapped Excitons in Fully Inorganic Zero-Dimensional Tin Halides

AU - Benin, Bogdan M.

AU - Dirin, Dmitry N.

AU - Morad, Viktoriia

AU - Wörle, Michael

AU - Yakunin, Sergii

AU - Rainò, Gabriele

AU - Nazarenko, Olga

AU - Fischer, Markus

AU - Infante, Ivan

AU - Kovalenko, Maksym V.

PY - 2018/8/27

Y1 - 2018/8/27

N2 - The spatial localization of charge carriers to promote the formation of bound excitons and concomitantly enhance radiative recombination has long been a goal for luminescent semiconductors. Zero-dimensional materials structurally impose carrier localization and result in the formation of localized Frenkel excitons. Now the fully inorganic, perovskite-derived zero-dimensional SnII material Cs4SnBr6 is presented that exhibits room-temperature broad-band photoluminescence centered at 540 nm with a quantum yield (QY) of 15±5 %. A series of analogous compositions following the general formula Cs4−xAxSn(Br1−yIy)6 (A=Rb, K; x≤1, y≤1) can be prepared. The emission of these materials ranges from 500 nm to 620 nm with the possibility to compositionally tune the Stokes shift and the self-trapped exciton emission bands.

AB - The spatial localization of charge carriers to promote the formation of bound excitons and concomitantly enhance radiative recombination has long been a goal for luminescent semiconductors. Zero-dimensional materials structurally impose carrier localization and result in the formation of localized Frenkel excitons. Now the fully inorganic, perovskite-derived zero-dimensional SnII material Cs4SnBr6 is presented that exhibits room-temperature broad-band photoluminescence centered at 540 nm with a quantum yield (QY) of 15±5 %. A series of analogous compositions following the general formula Cs4−xAxSn(Br1−yIy)6 (A=Rb, K; x≤1, y≤1) can be prepared. The emission of these materials ranges from 500 nm to 620 nm with the possibility to compositionally tune the Stokes shift and the self-trapped exciton emission bands.

KW - luminescence

KW - perovskites

KW - self-trapped excitons

KW - solid-state synthesis

KW - tin

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JF - Angewandte Chemie. International Edition

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Highly Emissive Self-Trapped Excitons in Fully Inorganic Zero-Dimensional Tin Halides

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