Single-Step Preparation of Graphene Oxide Transparent Electrode by PECVD and its Application in a Fast-Response UV-A-Selective Pyrophototronic Device

Basumatary, Bablu; Podder, Santanu; Sharma, B. L.; Pal, Arup R.; Sahariah, Munima B.; Sarma, Neelotpal Sen; Patil, D.S.

doi:10.1007/s11664-020-08291-8

Cited by 9 publications

(13 citation statements)

References 38 publications

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“…The applied external bias minimizes the recombination processes and helps the smooth movement of charge carriers in the devices, which can also be inferred from the energy level diagrams . It is noteworthy to mention here that the pyroelectric current becomes more prominent when the applied bias voltage is equal to the open-circuit voltage ( V oc ), which is shown in Figure a,b, however, above or below the V oc , photocurrent dominates over the pyroelectric current. , …”

Section: Resultsmentioning

confidence: 77%

“…The D peak corresponds to the breathing mode of k -point phonons of A 1g symmetry due to linear dispersion, and the peak at 1580 cm –1 corresponds to the E 2g mode, which is usually observed for graphite. It is related to the vibration of the sp 2 bonded carbon atoms, which is non-dispersive in nature. ,, The observed D peak occurs due to the possible disorder in the graphene stacks and incorporated defects causing structural imperfections, which is absent in single-layer graphene. The graphene structure can be confirmed from the G band and 2D band at 1584 and 2697 cm –1 respectively .…”

Section: Resultsmentioning

confidence: 84%

“…GO thin films are synthesized by PECVD . It is equipped with a stage and a heater integrated with proportional integral derivative controller assembly for facilitating substrate heating.…”

Section: Experimental Setup and Proceduresmentioning

confidence: 99%

“…Unlike pristine graphene, graphene oxide (GO) contains a mixture of sp 2 and sp 3 hybridized carbon–carbon bonds whose proportions determine the variations in the quality of GO. GO has many versatile applications in the field of optoelectronics, , transistors, , solar cells, battery, , supercapacitor, , photo-catalysis, biomedical applications ,, and so forth. It is well known that graphene is a transparent material with semi-metallic behavior.…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, both GO and ZnO are transparent materials, and they can endure high temperature ranges, as the synthesis process of GO furnishes the evidence whereas many experimentalists ,, have investigated ZnO for the same. The beauty of ZnO is its intrinsic pyroelectric property which is essentially crucial for its ultrafast photoresponse.…”

Section: Introductionmentioning

confidence: 99%

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Synergistic Effect of Au Interband Transition on Graphene Oxide/ZnO Heterostructure: Experimental Analysis with FDTD Simulation

et al. 2022

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We furnish a comprehensive study on light-induced carrier generation due to the synergistic contribution of Au interband transition and graphene oxide (GO)/ZnO heterostructure. Plasmonic gold nanoparticles (Au_nps) are incorporated as a substructure sandwiched between GO and ZnO, assisting in additional photo-induced charge carrier generation. GO is prepared by a single-step plasma-enhanced chemical vapor deposition process. The GO/ZnO heterostructure having an active working area of 0.25 cm 2 is created to unleash the pyroelectric property of ZnO, and subsequently, Au_np is introduced at the interface of GO/ZnO. Here, the interband transition of Au_np and its capability for charge carrier generation combined with the excitonic charge carrier generation of the highly crystalline non-centrosymmetric hexagonal wurtzite ZnO enhances the photoresponse. Furthermore, the interaction of Au_np with ZnO and its spatial electric field intensity distribution is demonstrated by finite difference time domain simulation which indicate toward an efficient carrier generation at the interface of Au_np and ZnO. The fabricated heterostructure has an active working wavelength in the UV-A region with the highest responsivity at 375 nm of the electromagnetic spectrum. The ultrafast response time (∼29 μs) of the device is due to the pyro-phototronic effect of the GO/ZnO heterostructure enhanced by the interband transition of Au. In the comparative study of the Au_np-enriched GO/ZnO heterostructure device with a GO/ZnO device, the former shows better performance. Both the devices work in the self-powered mode as well as the photoconductive mode, but with a higher on−off current ratio in the photoconductive mode. Hence, this work helps in properly understanding photo-induced charge generation in a Au interband transition enriched GO/ZnO heterostructure.

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Section: Resultsmentioning

confidence: 77%

Section: Resultsmentioning

confidence: 84%

“…GO thin films are synthesized by PECVD . It is equipped with a stage and a heater integrated with proportional integral derivative controller assembly for facilitating substrate heating.…”

Section: Experimental Setup and Proceduresmentioning

confidence: 99%