Fabrication and characterization of semiconducting single-walled carbon nanotube-based bulk hetero junction organic solar cell using spin coating technique

Swapna, P.; Rao, Y. Srinivasa

doi:10.1080/22243682.2015.1040834

Cited by 5 publications

(5 citation statements)

References 23 publications

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“…The authors have fabricated regular geometry NPD cells based on bulk heterojunction (BHJ) structure, which is formed by graphene as an anode, S-SWCNT as a donor, C60 as an acceptor and Al metal as cathode based on the previously reported BHJ solar cell [41][42][43]. The active area of the fabricated NPD device is 0.36 cm 2 .…”

Section: Nano-photodiode (Npd) Cell Design and Fabricationmentioning

confidence: 99%

Design and characterisation of graphene‐based nano‐photodiode array device for photo‐stimulation of subretinal implant

Moorthy

Sugantharathnam²,

Rathnasami

et al. 2019

Micro & Nano Letters

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Electrically stimulating the retina of the patients suffering due to extreme retinal disorders such as age related macula degeneration, retinitis pigmentosa is quickly turning into a feasible accomplishment through retinal implants. The objective of this work is to optimise the design, develop and test an organic photovoltaic based Nano Photo Diode Array (NPDA) device for retinal prosthesis application to restoring vision to patients blinded by degenerative retinal diseases. NPDA for subretinal stimulation has been fabricated based on Bulk heterojunction (BHJ) solar cell technology. Each pixel is composed by a graphene alone bottom anode, a semiconducting single wall carbon nanotube (S-SWCNT): C60 blend, and a top cathode in aluminum (Al) of 100 µm or 150 diameter. This NPDA device photovoltaically converts incident light into electric current to stimulate nearby retinal neurons without wired power connections. The fabricated device is able to provide a photo current density of 245 µA/cm 2 and photovoltage of 0.31 V. These results suggest that BHJ cell employed photodiode array used in this work make it better than POLYRETINA and SCNC. The significant improvement in photocurrent density paves the way for scaling up density of NPDA array in implant. Increased number of electrodes will indeed enhance visual acuity to greater extent.

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Section: Nano-photodiode (Npd) Cell Design and Fabricationmentioning

confidence: 99%

Design and characterisation of graphene‐based nano‐photodiode array device for photo‐stimulation of subretinal implant

Moorthy

Sugantharathnam²,

Rathnasami

et al. 2019

Micro & Nano Letters

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“…To begin, the graphene was dispersed in a solvent, Di-Methyl Acetamyde (DMA), to provide a uniform coating and adherence across the substrate. Initially, the researchers mixed the graphene powder (56.5 mg) in 20 mL of DMA for 2 h with a probe-type sonicator [ 42 ]. DMA had been used to disperse graphene, and thus the mixture was deposited over a glass substrate using the spin coating technique for 30 s at various spin rates ranging from 1000 to 1600 rpm.…”

Section: Materials and Methods For G-optrode Electrical Characterizat...mentioning

confidence: 99%

G-Optrode Bio-Interfaces for Non-Invasive Optical Cell Stimulation: Design and Evaluation

et al. 2022

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Biocompatibility and potential efficacy in biological applications rely on the bio-interactions of graphene nanoparticles with biological tissues. Analyzing and modulating cellular and device-level activity requires non-invasive electrical stimulation of cells. To address these needs, G-optrodes, bio-interfaces based on graphene, have been developed. These devices use light to stimulate cells without modifying their genetic code. Optoelectronic capabilities, in particular the capacity to transform light energy into electrical energy, will be maintained throughout the procedures of neural stimulation. G-optrodes have also been studied as thin films on a range of substrates, and they have been designed to function at a very small scale. This study examines the impact of G-optrode-based substrate designs on the optical stimulation of pheochromocytoma (PC-12). Graphene electrodes, known as G-optrodes, are responsible for converting light into electrical pulses with stimulating effects. G-optrode bio-interfaces provide a stimulus that is independent of wavelength range but is sensitive to changes in illuminance. The authors have performed a comprehensive investigation based on the correct effects of the medication in vitro, employing substrate-based G-optrode biointerfaces. In substrate-based systems, the authors have proven that graphene is biocompatible. PC-12 cells were cultured on graphene for 7 days. Based on the findings, 20-nm and 50-nm thick G-optrodes are being studied for possible use in biological and artificial retinal applications. The findings of this study highlight the significance of biocompatibility in the selection and use of G-optrodes for biomedical purposes.

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“…3 b . In the bulk heterojunction structure, S‐SWCNT is picked as an electron donor material, whereas, C 60 is the electron acceptor, in order to ensure high external quantum efficiency in the charge generation process [18]. S‐SWCNT: C 60 nanomaterial was added with 1,2 dichlorobenzene at a ratio of 1:100 and sonicated for 2 h using a sonicator to get spinnable blend solution [18].…”

Section: Sample Preparation For Experimental Studiesmentioning

confidence: 99%

“…In the bulk heterojunction structure, S‐SWCNT is picked as an electron donor material, whereas, C 60 is the electron acceptor, in order to ensure high external quantum efficiency in the charge generation process [18]. S‐SWCNT: C 60 nanomaterial was added with 1,2 dichlorobenzene at a ratio of 1:100 and sonicated for 2 h using a sonicator to get spinnable blend solution [18]. The excitons are also generated by the S‐SWCNTs after absorbing light mostly in both visible range 450–650 nm and NIR region between 900 and 1400 nm and exciton dissociation arises at the S‐SWCNT:C 60 interface [20].…”

Section: Sample Preparation For Experimental Studiesmentioning

confidence: 99%

“…The optoelectronic properties of S‐SWCNT: C 60 under various absorption spectra and morphology have been studied to evaluate charge transport properties and efficiency. It is easy processability has also been reported [18]. Nevertheless, till date, no report is intently connected with the biosafety of S‐SWCNT: C 60 blend in cells or live biosystems.…”

Section: Introductionmentioning

confidence: 99%

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Bio‐interface behaviour of graphene and semiconducting SWCNT:C₆₀blend based nano photodiode for subretinal implant

Moorthy

Parthasarathy

Daniel

2020

Biosurface and Biotribology

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Hybrid interfaces between living cells and organic conjugated polymers play a pivotal role in bioelectronics medicine. Currently, conjugated polymers are widely utilised for optical stimulation of living cells and other bio-interface applications such as neural probes, cellular scaffolds and biosensors for drug release. In such a work, the authors fabricated and characterised the Nano Photodiode array device for the subretinal implant. However, the authors did not discuss in their report about the biocompatibility of this new device. In this work, the authors manifest that the quintessential graphene electrode and polymer blend of semiconducting single-wall carbon nanotube and C 60 fullerene (S-SWCNT:C 60) sustains its optoelectronic properties all through the various strides for neural preparation. Further, the studies show that these materials can provide a favourable environment for cell proliferation and a high degree of biocompatibility. PC-12 cells used as a valuable model to validate the biocompatibility were grown successfully onto the S-SWCNT:C 60 active layer still preserving its optical and electrical properties. The improved electrical performance of nano photodiode made of graphene, S-SWCNT:C 60 established in the previous studies and the excellent bio-interface performance of this nano photodiode shows that the nano photodiode array proposed by the authors is a strong candidate for subretinal implants. authors conducted multiple studies to determine the spectral response, morphology, electrochemical stability, thermal stability and toxicity, for the assessment of these materials as an effective Biosurface and Biotribology Short Communication

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Fabrication and characterization of semiconducting single-walled carbon nanotube-based bulk hetero junction organic solar cell using spin coating technique

Cited by 5 publications

References 23 publications

Design and characterisation of graphene‐based nano‐photodiode array device for photo‐stimulation of subretinal implant

Design and characterisation of graphene‐based nano‐photodiode array device for photo‐stimulation of subretinal implant

G-Optrode Bio-Interfaces for Non-Invasive Optical Cell Stimulation: Design and Evaluation

Bio‐interface behaviour of graphene and semiconducting SWCNT:C₆₀blend based nano photodiode for subretinal implant

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Fabrication and characterization of semiconducting single-walled carbon nanotube-based bulk hetero junction organic solar cell using spin coating technique

Cited by 5 publications

References 23 publications

Design and characterisation of graphene‐based nano‐photodiode array device for photo‐stimulation of subretinal implant

Design and characterisation of graphene‐based nano‐photodiode array device for photo‐stimulation of subretinal implant

G-Optrode Bio-Interfaces for Non-Invasive Optical Cell Stimulation: Design and Evaluation

Bio‐interface behaviour of graphene and semiconducting SWCNT:C60blend based nano photodiode for subretinal implant

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Bio‐interface behaviour of graphene and semiconducting SWCNT:C₆₀blend based nano photodiode for subretinal implant