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Issue 12, 2019
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Solution-phase, template-free synthesis of PbI2 and MAPbI3 nano/microtubes for high-sensitivity photodetectors

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Abstract

Organic–inorganic hybrid perovskite materials with exotic semiconducting properties have become inevitable candidates for next-generation electronic devices. Very recently, a low dimensional nanostructure of the perovskite materials has attracted the scientific community due to its enhanced performance in optoelectronics as compared to its bulk counterparts. Herein, a facile method was developed for the scalable, room-temperature synthesis of CH3NH3PbI3 (MAPbI3) nano/microtubes by direct conversion of lead iodide (PbI2) microtubes through a solution-phase method. At first, the PbI2 microtubes were synthesized by the anti-solvent crystallization process and subsequently converted to CH3NH3PbI3 nano/microtubes by the addition of CH3NH3I (MAI) precursor directly in the solution phase. The corresponding photodetectors (PDs) in the lateral metal–semiconductor–metal (MSM) configuration of the PbI2 microtubes and MAPbI3 nano/microtubes on glass substrates were investigated systematically. Compared to the PbI2 based PDs (557 mA W−1, 3.65 × 1012 Jones, 0.251 s/0.252 s), the MAPbI3 based PDs exhibit higher photoresponsivity, specific detectivity, and faster response time (25 A W−1, 9.9 × 1013 Jones, 49 ms/20 ms) under irradiation with 4.6 μW cm−2 intensity light of the 532 nm laser at a bias of 5 V. The proposed method is a low-temperature process, easy to apply in large scale synthesis, and finds potential applications in optoelectronic devices.

Graphical abstract: Solution-phase, template-free synthesis of PbI2 and MAPbI3 nano/microtubes for high-sensitivity photodetectors

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Publication details

The article was received on 15 Jan 2019, accepted on 23 Feb 2019 and first published on 25 Feb 2019


Article type: Communication
DOI: 10.1039/C9NR00452A
Nanoscale, 2019,11, 5188-5196

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    Solution-phase, template-free synthesis of PbI2 and MAPbI3 nano/microtubes for high-sensitivity photodetectors

    P. V. Chandrasekar, S. Yang, J. Hu, M. Sulaman, Y. Shi, M. I. Saleem, Y. Tang, Y. Jiang and B. Zou, Nanoscale, 2019, 11, 5188
    DOI: 10.1039/C9NR00452A

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