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Hybrid Organic-inorganic Lead Bromide Perovskite Supercrystals Self-Assembled with L-cysteine and Their Highly Luminescent Properties

Abstract

The introduction of functional ligands, which is beneficial for the assembly of perovskite nanocrystals (PNCs), has opened up new avenues in fabrication of highly efficient optoelectronic and photovoltaic devices. In this work, self-assembled organic-inorganic hybrid lead bromide perovskite cubic supercrystals have been synthesized via a wet chemistry approach using trifunctional L-cysteine as capping ligands. These supercrystals was enhanced by 6.9 times comparing to discrete PNCs for the absolute photoluminescence (PL) quantum yield and observed PL lifetime of 642 ns as well as high stability in protic solvent. These properties are attributed to synergistic effect among amino, carboxylic and sulfhydryl groups, which not only guide the self-assembling process by cross-linking but also protect the individual PNCs from aggregating due to strong binding interactions between the L-cysteine ligands and the NCs. Furthermore, the CH3NH3PbBr3 suprecrystals have been used in the fabrication of green perovskite and white light-emitting diodes with excellent performance. The facile crosslinking process using unique L-cysteine ligands is promising for rational design and controllable fabrication of functional perovskite-based materials for optoelectronics applications.

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Publication details

The article was received on 24 Jul 2018, accepted on 10 Sep 2018 and first published on 12 Sep 2018


Article type: Paper
DOI: 10.1039/C8TC03668C
Citation: J. Mater. Chem. C, 2018, Accepted Manuscript
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    Hybrid Organic-inorganic Lead Bromide Perovskite Supercrystals Self-Assembled with L-cysteine and Their Highly Luminescent Properties

    S. Wang, L. Zhou, F. Huang, Y. Xin, P. Jin, Q. Ma, Q. Pang, Y. Chen and J. Z. Zhang, J. Mater. Chem. C, 2018, Accepted Manuscript , DOI: 10.1039/C8TC03668C

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