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The Effect of N,N-dimethylformamide on MAPbI3 Nanowires for Application in Flexible Photodetectors

Abstract

MAPbI3 nanowire (NW) with good crystal structure and novel one-dimensional (1D) outer surface which offer less grain boundaries, lower defect density and longer carrier lifetime, all these make MAPbI3 NW possess higher quantum efficiencies, larger carrier mobilities and longer carrier diffusion lengths when applied in optoelectronic devices. Here, by a simple two-step spin-coating method with the addition of various N,N-dimethylformamide (DMF) content, and the PbI2-DMF adduct is formed, leading to the micro-morphology of MAPbI3 perovskite changing from 3 dimension (3D) nanocubic to 1D NW. Also it is found that 500 µL DMF is the optimal for the MAPbI3 NW with strongest light absorbability and best crystallinity. In addition, the photodetectors (PDs) are assembled with various DMF amount on the glass substrate. The MAPbI3 NW PD with 500 µL DMF showed the best performance with on/off ratio greater than 250, the rise and decay time of 12 and 22 ms, respectively. Furthermore, the flexible MAPbI3 NW PD has been prepared and it shows good sequential and stable response with the on/off ratio reaching more than 45. More importantly, under various bending curvature and many cycles, the performance of the flexible NW device has little degradation. This study may have great help for the application of the flexible device based on MAPbI3 NW in the future.

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Publication details

The article was received on 01 May 2018, accepted on 10 Jun 2018 and first published on 12 Jun 2018


Article type: Paper
DOI: 10.1039/C8TC02103A
Citation: J. Mater. Chem. C, 2018, Accepted Manuscript
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    The Effect of N,N-dimethylformamide on MAPbI3 Nanowires for Application in Flexible Photodetectors

    D. Wu, H. Zhou, Z. Song, R. Liu and H. Wang, J. Mater. Chem. C, 2018, Accepted Manuscript , DOI: 10.1039/C8TC02103A

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