Enhancing the Power Conversion Efficiency of Inverted Organic Photovoltaics with Gold Functionalized Reduced Graphene Oxide

2015 ◽  
Vol 1737 ◽  
Author(s):  
Rebecca Isseroff ◽  
Zhenhua Yang ◽  
Jessica Kim ◽  
Andrew Chen ◽  
Miriam Rafailovich
Keyword(s):  
Graphene Oxide ◽  
Fermi Level ◽  
Reduced Graphene Oxide ◽  
Active Layer ◽  
Energy Gap ◽  
Power Conversion ◽  
Design Phase ◽  
Reduced Graphene ◽  
Exciton Recombination ◽  
First Time

ABSTRACTIn this study, an “inverted” design, phase-separated morphology and gold-functionalized reduced graphene oxide (Au-rGO) were used to address exciton recombination and poor Fermi level alignment. To increase efficiencies, a unique methodology was used to coat Au-rGO on top of the active layer. When 0.05 Au-rGO was blended with the active layer, there were metal-thiolate bonds with P3HT and π-π stacking with PCBM. However, KPFM, measured for the first time for this material, showed that the while 0.05mM Au-rGO reduced the energy gap between P3HT and PBCM, this was offset by recombination. KPFM showed that Au-rGO may be better suited between the active layer and electrode. When 0.5mM Au-rGO was coated on top of the active layer, efficiency increased (p<0.002) nearly 600%, suggesting that Au-rGO is a more effective acceptor than a constituent of the active layer.

Increasing Polymer Solar Cell Active Layer Efficiency and Organization by Adding Gold-Functionalized Reduced Graphene Oxide

2013 ◽  
Vol 1500 ◽  
Author(s):  
Rebecca Isseroff ◽  
Andrew Chen ◽  
Sneha Chittabathini ◽  
Alexandra Tse ◽  
Cheng Pan ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Solar Cell ◽  
Reduced Graphene Oxide ◽  
Active Layer ◽  
Bulk Heterojunction ◽  
Solar Cell Efficiency ◽  
Cell Efficiency ◽  
Reduced Graphene ◽  
Polymer Component ◽  
Low Efficiency

ABSTRACTRelatively low efficiency is one of the main obstacles to overcome in the engineering of organic bulk heterojunction (BHJ) solar cells. Reduced graphene oxide (RGO), which has high conductivity, has been proposed to enhance the function of PCBM in the interfacial dissociation of excitons, but incorporating it into the hydrophobic photoactive polymers has proved challenging. Here we describe a novel technique for incorporating Au nanoparticles (AuNp) into the structure of the RGO. The AuNps then interact with the sulfur groups on the photoactive polymer component, while the RGO interacts via π – π stacking with the chemically similar PCBM, thereby anchoring the complex to the polymer interface. Graphene oxide was synthesized and then reduced in the presence of a gold salt. The resulting gold-functionalized RGO (AuRGO) sheets were characterized using TGA, FTIR, and TEM. The AuRGO was not soluble in chlorobenzene; however, in the presence of P3HT, the AuRGO dissolved, suggesting a reaction between the gold and the sulfur of the P3HT via a metal-thiolate bond. At 2 mg/ml, AuRGO increased the solar cell efficiency approximately 50% over the control, but higher concentrations produced large, columnar structures which blocked the electrode from having a uniform contact with the active layer.

Graphite-specific peptide mediated synthesis of Pt nanoparticles on reduced graphene oxide for electrochemical detection of H2O2

2016 ◽  
Vol 09 (03) ◽  
pp. 1650051 ◽  
Author(s):  
Li Wang ◽  
Yantao Sun ◽  
Xiangxin Xue ◽  
Yujing Sun ◽  
Zhuang Li
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Electrochemical Detection ◽  
Electrocatalytic Activity ◽  
Pt Nanoparticles ◽  
Effective Strategy ◽  
Platinum Nanoparticle ◽  
Reduced Graphene ◽  
First Time ◽  
Specific Peptide

We demonstrate here a facile and effective strategy to prepare reduced graphene oxide-platinum nanoparticle (RGO-PtNP) nanohybrids by the mediation of graphite-specific peptide (GSP). For the first time, we found that GSP can be used to modify RGO non-covalently in one way, and in another way promote the formation of PtNPs on RGO as a biomolecular bridge. The created RGO-PtNP nanohybrids show enhanced electrocatalytic activity toward H2O2 and can be utilized to fabricate non-enzymatic electrochemical H2O2 sensor.

Controlled engineering of nano-sized FeOOH@ZnO hetero-structures on reduced graphene oxide for lithium-ion storage and photo-Fenton reaction

CrystEngComm ◽  
2020 ◽  
Vol 22 (16) ◽  
pp. 2827-2836 ◽  
Author(s):  
Binghui Xu ◽  
Xin Dai ◽  
Qingke Tan ◽  
Yuan Wei ◽  
Gonggang Liu ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Fenton Reaction ◽  
Lithium Ion ◽  
Ternary Composite ◽  
Hetero Structure ◽  
Reduced Graphene ◽  
Ion Storage ◽  
First Time

In this work, a nano-sized goethite and zinc oxide hetero-structure (FeOOH@ZnO) dispersed on reduced graphene oxide (RGO) sheets was synthesized for the first time to construct a ternary composite (FeOOH@ZnO/RGO) via a stepped graphene oxide (GO) deoxygenation process.

scholarly journals Novel iodine-doped reduced graphene oxide anode for sodium ion batteries

RSC Advances ◽  
2017 ◽  
Vol 7 (87) ◽  
pp. 55060-55066 ◽  
Author(s):  
Jianwei Li ◽  
Xifei Li ◽  
Dongbin Xiong ◽  
Youchen Hao ◽  
Huari Kou ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Anode Material ◽  
Sodium Ion ◽  
Sodium Ion Batteries ◽  
Reduced Graphene ◽  
First Time ◽  
Oxide Anode

It is reported for the first time that iodine-doped reduced graphene oxide (I-rGO) has been designed as an anode material for sodium ion batteries (SIBs).

Carbonates (bicarbonates)/reduced graphene oxide as anode materials for sodium-ion batteries

2017 ◽  
Vol 5 (47) ◽  
pp. 24645-24650 ◽  
Author(s):  
Xin Gu ◽  
Chunliu Yan ◽  
Liting Yan ◽  
Lei Cao ◽  
Feier Niu ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Anode Materials ◽  
Sodium Ion ◽  
Sodium Ion Batteries ◽  
Reduced Graphene ◽  
First Time

Carbonates/bicarbonates (FeCO3, CoCO3 and Ni(HCO3)2), as promising anode materials, are evaluated for sodium-ion batteries for the first time.

scholarly journals Electroanalytical detection of pindolol: comparison of unmodified and reduced graphene oxide modified screen-printed graphite electrodes

The Analyst ◽  
2015 ◽  
Vol 140 (5) ◽  
pp. 1543-1550 ◽  
Author(s):  
Loanda R. Cumba ◽  
Jamie P. Smith ◽  
Dale A. C. Brownson ◽  
Jesús Iniesta ◽  
Jonathan P. Metters ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Graphite Electrodes ◽  
Reduced Graphene ◽  
First Time ◽  
Screen Printed

We demonstrate, for the first time, that the electroanalytical quantification of pindolol is actually possible using bare (unmodified) screen-printed graphite electrodes (SPEs).

Development of new highly sensitive serotonin sensor based on green synthesized silver nanoparticles decorated reduced graphene oxide

2021 ◽  
Author(s):  
Chérif DRIDI ◽  
Zina Fredj ◽  
Maroua Moslah
Keyword(s):  
Silver Nanoparticles ◽  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Cost Effective ◽  
Reduced Graphene ◽  
Highly Sensitive ◽  
First Time ◽  
Green Synthesized Silver Nanoparticles

Electrochemical detectionof serotonin (5-hydroxytryptamine 5-HT) is proposed for the first time using a cost effective and eco-friendly nanocomposite of AgNPs and rGO which is synthesized through in situ green reduction...

Highly efficient hydrogen evolution electrocatalysts based on coupled molybdenum phosphide and reduced graphene oxide derived from MOFs

2017 ◽  
Vol 53 (93) ◽  
pp. 12576-12579 ◽  
Author(s):  
Ji-Sen Li ◽  
Jing-Quan Sha ◽  
Bing Du ◽  
Bo Tang
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Hydrogen Evolution ◽  
Highly Efficient ◽  
Electrocatalytic Performance ◽  
Reduced Graphene ◽  
Molybdenum Phosphide ◽  
Acidic Conditions ◽  
First Time

A coupled hybrid of molybdenum phosphide and reduced graphene oxide has been synthesized utilizing Mo-based MOFs as precursors through a facile method for the first time. The nanocomposite exhibits superior electrocatalytic performance, which is one of the best MoP-based electrocatalysts under acidic conditions reported so far.

Study on Phase, Molecular Bonding, and Bandgap of Reduced Graphene Oxide Prepared by Heating Coconut Shell

2015 ◽  
Vol 827 ◽  
pp. 285-289 ◽  
Author(s):  
Ananda Yogi Nugraheni ◽  
Muhammad Nasrullah ◽  
Fandi Angga Prasetya ◽  
Fahmi Astuti ◽  
Darminto
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Energy Gap ◽  
Heating Temperature ◽  
Ambient Air ◽  
Xrd Analysis ◽  
Coconut Shell ◽  
Gas Treatment ◽  
Reduced Graphene ◽  
Molecular Bonding

The purpose of this work is to search reduced graphene oxide (RGO) phase by identifying the molecular bonding, energy band gap and phase of old coconut shell. The characterization was performed by using FTIR, Uv-Vis and XRD spectroscopy. The heating temperature used in this work was 400°C and 600°C.Furthermore, the type of heating atmosphere used in this research covers nitrogen, ambient air with and without rinsing step. The XRD analysis shows that the RGO phase is formed by turbostatic structure which is a pile of random arrangement of parallel layers that make up the graphite structure with cliftonite phase at temperature 400°C and 600°C. In the inert nitrogen gas treatment, there are two impurity phases such as potassium chlorate (KClO4) and sulfur (S11). The molecular bondings of C=C, C-C, C-O, C=O, C-H and O-H appeared on the FTIR spectra of the samples were indentified. Analysis by using linear regression and absorbance edge methods was conducted to result in energy gap in the range from 0.14 to 0.67 eV, indicating that the produced samples are semiconducting materials.

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