TY - JOUR
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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U2 - 10.1002/anie.201806452
DO - 10.1002/anie.201806452
M3 - Article
AN - SCOPUS:85051021628
VL - 57
SP - 11329
EP - 11333
JO - Angewandte Chemie. International Edition
JF - Angewandte Chemie. International Edition
SN - 1433-7851
IS - 35
ER -