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Issue 20, 2019
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Capillary-bridge mediated assembly of aligned perovskite quantum dots for high-performance photodetectors

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Abstract

Effective assembly of perovskite quantum dots is a huge challenge to develop high-performance optoelectronic devices with large scale integration functionality. Here, we demonstrate a facile way to fabricate one-dimensional arrays consisting of aligned perovskite quantum dots and their remarkable application as high-performance photodetectors. All inorganic perovskite CsPbX3 (X = Cl, Br, I) quantum dots, synthesized by a hot injection method, are precisely assembled into the one-dimensional arrays using a liquid bridge induced assembly strategy. Systematic studies have shown that photodetectors based on such one-dimensional CsPbI3 quantum dot arrays have excellent performance in terms of high responsivity and high detection sensitivity. It is suggested that the availability of more oxygen-rich hole trapping states on the surface of the quantum dots play an important role in the photocurrent generation. This work presents a significant step forward towards scalable self-assembly of perovskite quantum dots into one-dimensional arrays, indicating an enormous potential in manufacturing of high-performance integrated optoelectronic sensor circuitry.

Graphical abstract: Capillary-bridge mediated assembly of aligned perovskite quantum dots for high-performance photodetectors

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Article information


Submitted
26 Feb 2019
Accepted
13 Apr 2019
First published
18 Apr 2019

J. Mater. Chem. C, 2019,7, 5954-5961
Article type
Paper

Capillary-bridge mediated assembly of aligned perovskite quantum dots for high-performance photodetectors

Z. Dai, Q. Ou, C. Wang, G. Si, B. Shabbir, C. Zheng, Z. Wang, Y. Zhang, Y. Huang, Y. Dong, J. J. Jasieniak, B. Su and Q. Bao, J. Mater. Chem. C, 2019, 7, 5954
DOI: 10.1039/C9TC01104H

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