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

Zhigao Dai, Qingdong Ou, Chujie Wang, Guangyuan Si, Babar Shabbir, Changxi Zheng, Ziyu Wang, Yupeng Zhang, Yamin Huang, Yemin Dong, Jacek J. Jasieniak, Bin Su, Qiaoliang Bao

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36 Citations (Scopus)


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.

Original languageEnglish
Pages (from-to)5954-5961
Number of pages8
JournalJournal of Materials Chemistry C
Issue number20
Publication statusPublished - 28 May 2019

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