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Crystal Structure Tuning in Organic Nanomaterials for Fast Response and High Sensitivity Visible-NIR Photo-detector

Abstract

A new polymorph of copper hexadecafluorophthalocyanine, the η-F16CuPc, was fabricated via organic vapor phase deposition. The crystal structure, morphology and optical properties of η-F16CuPc were characterized by X-ray diffraction, scanning electron microscopy, Fourier-transformed infrared spectroscopy and UV-Vis spectroscopy. Moreover, the phase transitions of F16CuPc from the η- to the β-phase were investigated by thermogravimetric analysis (TGA) and differential scanning calorimetry. In addition, the visible-NIR photodetectors based on F16CuPc nanowires were fabricated and their photo-response features were systematically studied. The absorption spectra of the η-F16CuPc exhibited a broad band in the visible and near-infrared (NIR) regions, extending to a wavelength of ~900 nm. The η-F16CuPc photodetector exhibited fast response even at a low bias voltage of 0.5V under a solar simulator with a power of 100 mW cm−2. The photocurrent response rise/fall time of photodetectors was ~ 448 ms under various irradiation wavelengths. This organic-based photodetectors also performed well for near-infrared light with wavelength up to 940 nm.

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Publication details

The article was received on 12 Oct 2017, accepted on 11 Jan 2018 and first published on 11 Jan 2018


Article type: Paper
DOI: 10.1039/C7TC04663D
Citation: J. Mater. Chem. C, 2018, Accepted Manuscript
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    Crystal Structure Tuning in Organic Nanomaterials for Fast Response and High Sensitivity Visible-NIR Photo-detector

    T. Zou, X. Wang, H. Ju, Q. wu, T. Guo, W. Wu and H. Wang, J. Mater. Chem. C, 2018, Accepted Manuscript , DOI: 10.1039/C7TC04663D

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