Stimulating photodiode characteristics of hybrid ZnPc-MWCNTs

•MWCNTs bandgap shifts from NIR to visible energy (1.26-2.60 eV) after a successful hybridization process with ZnPc molecules.•The hybridization of MWCNTs with ZnPc molecules improves the characteristic photodiode parameters of the MWCNTs.•The current intensity of the hybrid ZnPc-MWCNTs is 3 times h...

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Bibliographic Details
Published in:Journal of alloys and compounds 2022-01, Vol.891, p.161783, Article 161783
Main Authors: Osama, Rokaya, Morsy, Mohamed, Al-Kamel, Abdel Naser, Mahmoud, Esmat A., Ashery, Adel, El-Sayed, Afaf
Format: Article
Language:English
Subjects:
Electrical properties
Energy gap
Heterojunctions
Hybrid MWCNTs
I-V characteristics
Multi wall carbon nanotubes
MWCNTs
Optical bandgap
Optical properties
Optoelectronics
Organic semiconductors
p-n heterojunction photodiode
P-n junctions
Photodiodes
ZnPc
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Summary:•MWCNTs bandgap shifts from NIR to visible energy (1.26-2.60 eV) after a successful hybridization process with ZnPc molecules.•The hybridization of MWCNTs with ZnPc molecules improves the characteristic photodiode parameters of the MWCNTs.•The current intensity of the hybrid ZnPc-MWCNTs is 3 times higher than that of the pristine MWCNTs in visible light. The ability to functionalize multi-wall carbon nanotubes (MWCNTs) with organic semiconductors is a promising methodology to promote their use in multiple optoelectronic applications, especially at the visible region of the optical spectra. In this article, we investigate the structural, optical, and electrical properties of chemically synthesized MWCNTs hybridized with zinc phthalocyanine (ZnPc) molecules. Interestingly, the hybrid ZnPc-MWCNTs optical bandgap shifts towards the visible light at 2.6 eV instead of the near-infrared bandgap of the pristine sample at 1.2 eV. Besides, the ZnPc-MWCNTs hybrid exhibits enhanced p-n heterojunction photodiode characteristics that are significantly improved with temperature increase. Moreover, the I-V curves of the hybrid ZnPc-MWCNTs sample under visible illumination conditions express a current intensity three times higher than the pristine MWCNTs sample. This promotes the use of the ZnPc-MWCNTs hybrid in various optoelectronic applications working in the visible region of optical spectra.
ISSN:0925-8388
1873-4669
DOI:10.1016/j.jallcom.2021.161783