Graphene has been used to synthesize graphene quantum dots (GQDs) via pulsed laser ablation. By depositing the synthesized GQDs on the surface of InGaP/InGaAs/Ge triple-junction solar cells, the
One of the pioneering materials nowadays is graphene quantum dot (GQD), which possesses outstanding electrical, thermal, and mechanical properties followed by less
ZnO/Graphene Quantum Dot Solid-State Solar Cell. Mrinal Dutta, †, ‡ Sanjit Sarkar, † Tushar Ghosh, and Durga Basak * Department of Solid State Physics, Indian Association for the Cultivation
First-principles density functional theory (DFT) was adopted for investigating the influence of adatoms (S, Si, Al) upon the graphene quantum dot functionalized with the carboxyl group (CO 2 H-GQD) in order to find novel materials due to unique optical (redshift) and electronic (lower bandgap) properties for utilization in quantum dot solar cells (QDSCs).
Here we report a solution-processed PbS quantum dot solar cell, consisting of a PbS-silane functionalized reduced graphene oxide (PbS-rGO) layer on top of the PbS absorber film, which enhances device stability, especially when the solar cells are exposed to moisture. Power conversion efficiency (PCE) measurements demonstrate a slower degradation under
L. Yang, X. Yu, M. Xu, H. Chen, and D. Yang, “Interface engineering for efficient and stable chemical-doping-free graphene-on-silicon solar cells by introducing a graphene oxide interlayer,” Journal of Materials Chemistry A, vol. 2, no. 40, pp. 16877–16883, 2014
To tackle this issue, a 2D graphene derivative, graphene quantum dots (GQDs) can be a promising material for generating better PCE. 2D materials have outstanding optical properties, which makes them expedient for applications such as photonic devices, photodetectors, sensors, and lasers .Furthermore, carbon nanostructure can be used to
Graphene quantum dots (GQDs), an intriguing low-dimensional material, possess high conductivity, quantum size effect, superior optical properties, and other virtues [28, 29]. Moreover, the rich functionalized groups in GQDs deriving from the synthetic conditions, such as hydroxyl (−OH), carbonyl (−C=O), carboxylic (–COOH) and amine (−NH 2 ), endow them
In this work, Graphene quantum dots (GQDs) was decorated on the SnO 2 electron transport layers (ETLs) to boost the performance of perovskite solar cells (PSCs). The power conversion efficiency (PCE) of 21.1% was acquired with the combination of SnO 2 and GQDs. Compared with the SnO 2-only ETL devices (18.6%), the PCE of SnO 2 /GQDs based
Zinc oxide (ZnO), a material with excellent electron mobility and a low-temperature requirement for production, is a promising option for use as an electron transport layer in perovskite solar cells (PSCs).
Utilizing the synergistic effect of quantum dots (QDs) along with upconversion (UC) properties in perovskite solar cells (PSCs) is an efficient strategy to extend the absorption spectrum from visible into near-infrared (NIR) range, which leads to an explosive evolution in improving solar cell performance. Herein, upconversion graphene quantum dots (UC GQDs,
Zero-dimensional graphene quantum dots (GQDs) have lately intrigued intensive interest because of their great promise in energy, optoelectronic, and bio-imaging applications.
Download: Download high-res image (326KB) Download: Download full-size image Fig. 1. Basic structure of dye and quantum dot sensitized solar cells. (A) shows the layers of the solar cell cell comprising FTO as the transparent electrode, TiO 2 as the transparent conducting oxide, the sensitizer (dye/QDs), the HTM as the electrolyte, and Pt/Au/Ag as the
High-performance perovskite solar cells using the graphene quantum dot–modified SnO 2 /ZnO photoelectrode Author links open overlay panel G. Nagaraj a, Mustafa K.A. Mohammed b c, Masoud Shekargoftar d, P. Sasikumar e, P. Sakthivel f, G. Ravi f, M. Dehghanipour g, Seckin Akin h, Ahmed Esmail Shalan i j
Introduction. Graphene quantum dots (GQDs) have attracted a great deal of attention in photovoltaic applications due to a series of excellent properties such as high carrier transport mobility, large surface area, tunable band gaps, quantum confinement, and environmentally friendly nature. 1−8 Unremitting efforts have been made in the preparation of
This research has been conducted to find new, high-performing, safe, and suitable materials for use in quantum dot solar cells (QDSCs). Specifically, impact of halogen adatoms (Br, Cl, and F) on carboxyl edge-functionalized graphene quantum dot (CO 2 H-GQD) has been investigated employing DFT-based first-principles computations. We analyzed
An attempt to enhance the performance of planar-type perovskite solar cells was performed by introducing graphene quantum dots (GQDs) onto a blocking TiO 2 layer via O 2 plasma treatment. Furthermore, the bandgap of the GQDs was tuned through their size control and the effects of the GQD size on cell performance were explored. The GQDs can
Graphene and carbon quantum dots have extraordinary optical and electrical features because of their quantum confinement properties. This makes them attractive materials for applications in photovoltaic devices (PV).
The composite material characterized and optimized at different compositions indicates a Cu/RGO mass ratio of 4 provides the best electrochemical performance. A
We report on a significant power conversion efficiency improvement of perovskite solar cells from 8.81% to 10.15% due to insertion of an ultrathin graphene quantum dots (GQDs) layer between perovskite and TiO2.
We present an investigation of organic photovoltaic (OPV) cells with solution-processable graphene quantum dots (GQDs) as hole transport layers (HTLs). GQDs, with uniform sizes and good conductivity, are demonstrated to be
In this study, the strategic incorporation of chiral graphene quantum dots (GQDs) at the PSC interface is pioneered, significantly mitigating these losses through this chiral
Graphene quantum dots (GQDs) have shown broad application prospects in the field of photovoltaic devices due to their unique quantum confinement and edge effects. Here,
After being exposed to an N 2 environment for 30 days, graphene quantum dots-based perovskite solar cells showed a loss in power conversion efficiency of roughly 28 %. Under the same circumstances, however, the PCE of PEDOT-PSS cells fell by 42 %. Power conversion efficiencies of 13 % and 15 % were achieved for forward and backward scans in
Recent experiments suggest graphene-based materials as candidates for use in future electronic and optoelectronic devices. In this study, we propose a new multilayer quantum dot (QD) superlattice (SL) structure with graphene as the core and silicon (Si) as the shell of QD. The Slater–Koster tight-binding method based on Bloch theory is exploited to
Graphene quantum dots (GQDs) have been considered as a novel material because their electronic and optoelectronic properties can be tuned by controlling the size and the functional groups of GQDs. Here we report the synthesis of reduction-controlled GQDs and their application to bulk heterojunction (BHJ) solar cells with enhanced power conversion efficiency
We noticed that graphene quantum dots (GQDs) A uniform solar cell with a thin and legible PCBM: GQDs layer atop the perovskite layer can be observed from the cross sectional scanning electron microscopy (SEM) image (Fig. 2 b). Fig. 3 a shows the current density-voltage (J-V) curves of the best PSCs with doping the 0.5 wt% concentration of GQDs
The champion CsPbI3 quantum dot solar cell has an efficiency of 15.1% (stabilized power output of 14.61%), which is among the highest report to date. Building on this strategy, we further
There are a number of reviews on utilization of graphene in different types of solar cells, e.g., publications by Martinez-Ferrero 11 and Kymakis 12 as well as studies on the design of QD-based solar cells reported by Yamaguchi, 13 Sargent 14 and Beard. 15 However, no feature publications on the application of graphene – QD hybrid nanostructures and fabrication of solar
A thickness-insensitive cathode interlayer (CIL) is necessary for large-area polymer solar cells (PSCs), in which thickness variation is unavoidable. These CIL materials are typically based on n-type conjugated polymer/molecule backbones, which show strong light absorption in the visible/near-infrared (NIR) region. This interferes with the sunlight absorption
Graphene quantum dots (GQDs) synthesized by a direct chemical method have been used in combination with ZnO nanowires (NWs) to demonstrate their potential as a solar harvesting material in photovoltaic cells
Graphene quantum dots (GQDs) are zero-dimensional carbonous materials with exceptional physical and chemical properties such as a tuneable band gap, good
In organic–inorganic halide perovskite solar cells (PSCs), the perovskite layer is the main source of photogenerated electron–hole pairs. Therefore, the premier concern in PSCs is to improve the quality of the perovskite film (PF). In the present research, graphene quantum dots (GQDs) were prepared and incorporated in the perovskite precursor, and due to the
The in-depth analysis of the simulation result revealed that Graphene Quantum Dots (GQDs) can act as an appropriate hole transport layer (HTL) and can enhance hole
Perovskite solar cells were proposed first in 2009 we observed that the intensity of the PL curve of the sample based on SnO 2 film doped graphene quantum dot with 4.5% concentration is significantly lower than that of the PL curve of the sample based on SnO 2 film doped graphene quantum dots with 0% concentration. The SnO 2 electron transport layer
This research has been conducted to find new, high-performing, safe, and suitable materials for use in quantum dot solar cells (QDSCs). Specifically, impact of halogen
This study explored the effects of Neodymium-doped graphene quantum dots (NdGQDs) on improving the performance efficiency of TiO 2 based dye-sensitized solar cells (DSSCs). By employing in-situ physical assisted mixing, DSSCs with optimized NdGQDs in TiO 2 photoanodes showed a power conversion efficiency of 8.76 %, a significant improvement compared to the
Efficient charge transport is especially important for achieving high performance of perovskite solar cells (PSCs). Here, molecularly designed graphite–nitrogen doped graphene quantum dots (GN-GQDs) act as a functional semiconductor additive in perovskite film. GN-GQDs with abundant N active sites participate in the crystallization of perovskite film and effectively
Currently, the quaternary polymer solar cells (PSCs) stand out as one of the most promising strategies for sustainable energy harvesting. However, it is challenging to successfully achieve efficient PSCs with a broad light absorption window and effective charge transport via introducing third and fourth components into the binary systems, while minimizing morphological
Graphene and carbon quantum dots have extraordinary optical and electrical features because of their quantum confinement properties. This makes them attractive materials for applications in photovoltaic devices (PV).
One of the pioneering materials nowadays is graphene quantum dot (GQD), which possesses outstanding electrical, thermal, and mechanical properties followed by less toxicity and robust photoluminescence. These commendable properties allow GQD to be suitable enough to apply in dye-sensitized solar cells, incapacitating current material limits.
You have not visited any articles yet, Please visit some articles to see contents here. Graphene quantum dots (GQDs) synthesized by a direct chemical method have been used in combination with ZnO nanowires (NWs) to demonstrate their potential as a solar harvesting material in photovoltaic cells exhibiting an open circuit voltage of 0.8 V.
The recombination of charge carriers in CuBi2O4 is an inherent problem due to very low hole mobility and polaron transport in the valence band. The in-depth analysis of the simulation result revealed that Graphene Quantum Dots (GQDs) can act as an appropriate hole transport layer (HTL) and can enhance hole transportation.
Moreover, GQDs are widely implemented in graphene-quantum dot solar cells (QDSCs) applications as third material for bulk-heterojunction polymer:fullerene solar cell [ 36] and Si heterojunction solar cells [ 37] to improve light conversion efficiency.
Wang S, Li Z, Xu X, Zhang G, Li Y, Peng Q (2019) Amino-functionalized graphene quantum dots as cathode interlayer for efficient organic solar cells: quantum dot size on interfacial modification ability and photovoltaic performance.
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