Zou, T;
Wang, X;
Ju, H;
Wu, Q;
Guo, T;
Wu, W;
Wang, H;
(2018)
Crystal structure tuning in organic nanomaterials for fast response and high sensitivity visible-NIR photo-detector.
Journal Of Materials Chemistry C
, 6
(6)
pp. 1495-1503.
10.1039/c7tc04663d.
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Abstract
A new polymorph of copper hexadecafluorophthalocyanine, 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 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 a fast response even at a low bias voltage of 0.5 V under a solar simulator with a power of 100 mW cm−2. The photocurrent response rise/fall time of the photodetector was ∼448 ms under various irradiation wavelengths. This organic-based photodetector also performed well for near-infrared light with wavelengths up to 940 nm.
| Type: | Article |
|---|---|
| Title: | Crystal structure tuning in organic nanomaterials for fast response and high sensitivity visible-NIR photo-detector |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1039/c7tc04663d |
| Publisher version: | http://dx.doi.org/10.1039/c7tc04663d |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > MAPS Faculty Office UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > MAPS Faculty Office > Institute for Materials Discovery |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10044457 |
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