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Issue 12, 2018
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Circularly polarized photoluminescence and Hanle effect measurements of spin relaxation in organic–inorganic hybrid perovskite films

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Abstract

Partial circularly polarized photoluminescence (CPL) with a polarization degree (P) of 2% from CH3NH3PbBr3 film at 77 K is observed, excited by a circularly polarized 532 nm laser. However, P decreases to 0.3% when excited using a circularly polarized 447 nm laser, and to zero using a linear polarized laser. The Hanle effect is measured to study spin relaxation in CH3NH3PbBr3 film, yielding a spin lifetime of ∼240 ps at 77 K, which however becomes one order of magnitude smaller when the temperature increases to 110 K. The existence of a CPL that is dependent on the helicity of the excitation laser, and the unexpectedly long spin lifetime with large spin–orbit coupling, suggest the potential of hybrid perovskites for spintronic applications.

Graphical abstract: Circularly polarized photoluminescence and Hanle effect measurements of spin relaxation in organic–inorganic hybrid perovskite films

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Publication details

The article was received on 25 Dec 2017, accepted on 24 Feb 2018 and first published on 27 Feb 2018


Article type: Paper
DOI: 10.1039/C7TC05916G
Citation: J. Mater. Chem. C, 2018,6, 2989-2995
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    Circularly polarized photoluminescence and Hanle effect measurements of spin relaxation in organic–inorganic hybrid perovskite films

    R. Wang, S. Hu, X. Yang, X. Yan, H. Li and C. Sheng, J. Mater. Chem. C, 2018, 6, 2989
    DOI: 10.1039/C7TC05916G

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