Journal article
Enhanced photoluminescence quantum yield of MAPbBr3 nanocrystals by passivation using graphene
- Abstract:
- Diminishing surface defect states in perovskite nanocrystals is a highly challenging subject for enhancing optoelectronic device performance. We synthesized organic/inorganic lead-halide perovskite MAPbBr3 (MA = methylammonium) clusters comprising nanocrystals with diameters ranging between 20–30 nm and characterized an enhanced photoluminescence (PL) quantum yield (as much as ~ 7 times) by encapsulating the MAPbBr3 with graphene (Gr). The optical properties of MAPbBr3 and Gr/MAPbBr3 were investigated by temperature-dependent micro-PL and time-resolved PL measurements. Density functional theory calculations show that the surface defect states in MAPbBr3 are removed and the optical band gap is reduced by a 0.15 eV by encapsulation with graphene due to partial restoration of lattice distortions.
- Publication status:
- Published
- Peer review status:
- Peer reviewed
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(Preview, Supplementary materials, 316.7KB, Terms of use)
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(Preview, Accepted manuscript, 1.1MB, Terms of use)
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- Publisher copy:
- 10.1007/s12274-020-2718-8
Authors
- Publisher:
- Springer
- Journal:
- Nano Research More from this journal
- Volume:
- 13
- Pages:
- 932-938
- Publication date:
- 2020-03-09
- Acceptance date:
- 2020-02-14
- DOI:
- EISSN:
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1998-0000
- ISSN:
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1998-0124
- Language:
-
English
- Keywords:
- Pubs id:
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1087540
- Local pid:
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pubs:1087540
- Deposit date:
-
2020-02-14
Terms of use
- Copyright holder:
- Tsinghua University Press and Springer-Verlag GmbH
- Copyright date:
- 2020
- Rights statement:
- © Tsinghua University Press and Springer-Verlag GmbH Germany, part of Springer Nature 2020.
- Notes:
- This is the accepted manuscript version of the article. The final version is available online from Springer at: https://doi.org/10.1007/s12274-020-2718-8
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