Solution processed reduced graphene oxide electrodes for organic photovoltaics

Petridis, C.; Konios, Dimitrios; Stylianakis, Minas M.; Kakavelakis, George; Sygletou, Maria; Savva, Kyriaki; Tzourmpakis, Pavlos; Krassas, Miron; Vaenas, Naoum; Stratakis, Emmanuel; Kymakis, Emmanuel

doi:10.1039/c5nh00089k

Cited by 45 publications

(28 citation statements)

References 54 publications

(71 reference statements)

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“…Hence, it has a wide range of applications, including energy storage, biomedicine, and pollution treatment, etc. (Chen et al, 2012;Adeleye et al, 2016;Petridis et al, 2016). The annual production of graphene family nanomaterials was estimated to be 120 metric tons in 2015, and expected to reach 1200 metric tons by 2019 (Zurutuza and Marinelli, 2014;Ciriminna et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Photochlorination-induced transformation of graphene oxide: Mechanism and environmental fate

Adeleye

Keller

et al. 2017

Water Research

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a b s t r a c tWith the increasing production and wide utilization of graphene oxide (GO), the nanomaterials are expected to be released into the environment, and end up in surface waters, and/or wastewater treatment plants. This study explored the changes in the physicochemical properties of GO resulting from photochlorinationd simulating the reactions that occur during water and wastewater treatment. Photochlorination resulted in significant changes in the surface oxygen-functionalities of the nanomaterials, and fragmenting of the graphenic carbon sheets was observed. We found that photochlorination can enhance the decomposition of GO through the formation of reduced GO. The changes in surface oxygenfunctionalities of GO were attributed to the oxidation by chlorine of the nanomaterials' quinone groups, and further oxidation by and/or radicals. The surface charge of GO, measured by its zeta potential, increased in magnitude with chlorination but decreased in magnitude with photochlorination, leading to the decrease in the colloidal stability of the photochlorinated nanomaterials. The antibacterial effect of the nanomaterials increased with both chlorination and photochlorination. This study clearly shows how the physicochemical properties, and environmental fate and effect of GO are modified by photochlorination.

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Section: Introductionmentioning

confidence: 99%

Photochlorination-induced transformation of graphene oxide: Mechanism and environmental fate

Adeleye

Keller

et al. 2017

Water Research

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“…In this chapter, the concept of solution-processed graphene-based films as anode electrodes in OSCs has been presented, with respect to the fabrication techniques used: (a) thermally reduced graphene, (b) chemically and photochemically rGO, (c) composite rGO-CNTs, and (d) rGO mesh Reprinted with permission from Petridis et al [26]. Reproduced by permission of The Royal Society of Chemistry.…”

Section: Resultsmentioning

confidence: 99%

“…Therefore, developing new materials combining most desirable properties for transparent electrodes will contribute to satisfy the increasing demand for lowcost solution-processed flexible devices. Due to its exceptional properties, graphene is highly attractive and is believed to be the next wonder material for optoelectronics; thus, triggering its application as a transparent electrode for flexible energy-harvesting devices [26].…”

Section: Introductionmentioning

confidence: 99%

Solution-Processed Graphene-Based Transparent Conductive Electrodes as Ideal ITO Alternatives for Organic Solar Cells

Stylianakis¹,

Konios²,

Petridis³

et al. 2017

Graphene Materials - Advanced Applications

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The isolation of free-standing graphene in 2004 was the spark for a new scientific revolution in the field of optoelectronics. Due to its extraordinary optoelectronic and mechanical properties, graphene is the next wonder material that could act as an ideal low-cost alternative material for the effective replacement of the expensive conventional materials used in organic optoelectronic applications. Indeed, the enhanced electrical conductivity of graphene combined with its high transparency in visible and near-infrared spectra, enabled graphene to be an ideal low-cost indium tin oxide (ITO) alternative in organic solar cells (OSCs). The prospects and future research trend in graphenebased TCE are also discussed. On the other hand, solution-processed graphene combines the unique optoelectrical properties of graphene with large area deposition and flexible substrates making it compatible with printing and coating technologies, such as roll-to-roll, inkjet, gravure, and flexographic printing manufacturing methods. This

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“…However, the electronic properties of graphene differ according to the growth technology utilized [6], the grain size, the interaction with the underlying substrate as well as the non-intended doping that systematically occurs during fabrication [7]. In addition, graphene and 2D materials are extremely sensitive to environment, implying uncontrollable variations such as the threshold voltage of 2D based field effect devices [8,9].…”

Section: Introductionmentioning

confidence: 99%

Electronic properties of embedded graphene: doped amorphous silicon/CVD graphene heterostructures

Arezki

Boutchich

Alamarguy

et al. 2016

J. Phys.: Condens. Matter

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Using Raman scattering we show that despite the mechanical strain induced by the a-Si:H deposition, the structural integrity of the graphene is preserved. Moreover, Hall effect measurements directly on the embedded graphene show that the electronic properties of CVD graphene can be modulated according to the doping type of the a-Si:H as well as its phase i.e. amorphous or nanocrystalline. The sheet resistance varies from 360 Ω/sq to 1260 Ω/sq for the (p)-aSi:H/Gr (n)-a-Si:H/Gr, respectively. We observed a temperature independent hole mobility of up to 1400 cm²/Vs indicating that charge impurity is the principal mechanism limiting the transport in this heterostructure. We have demonstrated that embedding CVD graphene under a-Si:H is a viable route for large scale graphene based solar cells or displays applications.

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Solution processed reduced graphene oxide electrodes for organic photovoltaics

Abstract: Since the isolation of free standing graphene in 2004, graphene research has experienced a phenomenal growth.

Cited by 45 publications

References 54 publications

Photochlorination-induced transformation of graphene oxide: Mechanism and environmental fate

Photochlorination-induced transformation of graphene oxide: Mechanism and environmental fate

Solution-Processed Graphene-Based Transparent Conductive Electrodes as Ideal ITO Alternatives for Organic Solar Cells

Electronic properties of embedded graphene: doped amorphous silicon/CVD graphene heterostructures

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