Doping graphene with carbon-based cage molecules for optoelectronic devices

2020 ◽  
Author(s):  
Anupama B. Kaul
Keyword(s):  
Optoelectronic Devices ◽  
Cage Molecules ◽  
Carbon Based

scholarly journals Recent Progress in Carbon-Based Buffer Layers for Polymer Solar Cells

Polymers ◽  
2019 ◽  
Vol 11 (11) ◽  
pp. 1858 ◽  
Author(s):  
Nguyen ◽  
Nguyen ◽  
Nguyen ◽  
Le ◽  
Vo ◽  
...  
Keyword(s):  
Solar Cells ◽  
Electron Transport ◽  
Carbon Nitride ◽  
High Efficiency ◽  
Polymer Solar Cells ◽  
Optoelectronic Devices ◽  
Carbon Quantum Dots ◽  
Buffer Layers ◽  
Future Directions ◽  
Carbon Based

Carbon-based materials are promising candidates as charge transport layers in various optoelectronic devices and have been applied to enhance the performance and stability of such devices. In this paper, we provide an overview of the most contemporary strategies that use carbon-based materials including graphene, graphene oxide, carbon nanotubes, carbon quantum dots, and graphitic carbon nitride as buffer layers in polymer solar cells (PSCs). The crucial parameters that regulate the performance of carbon-based buffer layers are highlighted and discussed in detail. Furthermore, the performances of recently developed carbon-based materials as hole and electron transport layers in PSCs compared with those of commercially available hole/electron transport layers are evaluated. Finally, we elaborate on the remaining challenges and future directions for the development of carbon-based buffer layers to achieve high-efficiency and high-stability PSCs.

scholarly journals Symmetry of Surface States in Graphene Superlattices Terminated With Magnetic Cap Layers

2021 ◽  
Author(s):  
Huaizhe Xu ◽  
Qiqi Yan ◽  
Liying Wang ◽  
Sansheng Wang ◽  
Yaping Zhang
Keyword(s):  
Optoelectronic Devices ◽  
Surface States ◽  
Numerical Calculations ◽  
Quantum Electronic ◽  
Cap Layer ◽  
General Complex ◽  
Carbon Based

Abstract The symmetry of surface states in graphene superlattices (SLs) terminated with a magnetic cap layer has been identified with numerical calculations. It is found that the surface states in pure electric SLs with As ≥ 0 are symmetric about ky = 0 to those with As ≤ 0 . While those in pure magnetic SLs with the same As are symmetric about E = 0. Additionally, the surface states in SLs of general complex electric/magnetic basis show no symmetry. The symmetry of surface states in terminated SLs is mainly determined by the nature of the basis and its configuration. These interesting results provide a useful guideline to the experimental exploration of carbon-based quantum electronic and optoelectronic devices.

SEM Cold Stage Techniques for the Observation of Vegetative and Floral Apices of Oat (Avena sativa L.) Plants

1977 ◽  
Vol 35 ◽  
pp. 590-591
Author(s):  
B. K. Kirchoff ◽  
L.F. Allard ◽  
W.C. Bigelow
Keyword(s):  
Critical Point ◽  
Avena Sativa ◽  
Substantial Improvement ◽  
Fresh Tissue ◽  
Cold Stage ◽  
Critical Point Drying ◽  
Almost All ◽  
Cell Collapse ◽  
Conductive Paint ◽  
Carbon Based

In attempting to use the SEM to investigate the transition from the vegetative to the floral state in oat (Avena sativa L.) it was discovered that the procedures of fixation and critical point drying (CPD), and fresh tissue examination of the specimens gave unsatisfactory results. In most cases, by using these techniques, cells of the tissue were collapsed or otherwise visibly distorted. Figure 1 shows the results of fixation with 4.5% formaldehyde-gluteraldehyde followed by CPD. Almost all cellular detail has been obscured by the resulting shrinkage distortions. The larger cracks seen on the left of the picture may be due to dissection damage, rather than CPD. The results of observation of fresh tissue are seen in Fig. 2. Although there is a substantial improvement over CPD, some cell collapse still occurs.Due to these difficulties, it was decided to experiment with cold stage techniques. The specimens to be observed were dissected out and attached to the sample stub using a carbon based conductive paint in acetone.

Stable production of platform chemicals from the continuous hydrodeoxygenation of a raw bio-oil using enhanced carbon-based catalysts

2020 ◽  
Author(s):  
Idoia Hita ◽  
Tomas Cordero-Lanzac ◽  
Francisco J. Garcia-Mateos ◽  
Jose Rodriguez-Mirasol ◽  
Tomas Cordero ◽  
...  
Keyword(s):  
Platform Chemicals ◽  
Stable Production ◽  
Bio Oil ◽  
Carbon Based

Stable production of platform chemicals from the continuous hydrodeoxygenation of a raw bio-oil using enhanced carbon-based catalysts

2020 ◽  
Author(s):  
Idoia Hita ◽  
Tomas Cordero-Lanzac ◽  
Francisco J. Garcia-Mateos ◽  
Jose Rodriguez-Mirasol ◽  
Tomas Cordero ◽  
...  
Keyword(s):  
Platform Chemicals ◽  
Stable Production ◽  
Bio Oil ◽  
Carbon Based

Controlling Gas Selectivity in Molecular Porous Liquids by Tuning the Cage Window Size

2019 ◽  
Author(s):  
Benjamin Egleston ◽  
Konstantin V. Luzyanin ◽  
Michael C. Brand ◽  
Rob Clowes ◽  
Michael E. Briggs ◽  
...  
Keyword(s):  
Nmr Spectroscopy ◽  
Chemical Synthesis ◽  
Field Gradient ◽  
Window Size ◽  
Standard Approach ◽  
Porous Solids ◽  
Pulsed Field Gradient Nmr ◽  
Pulsed Field ◽  
Cage Molecules ◽  
Gas Selectivity

Control of pore window size is the standard approach for tuning gas selectivity in porous solids. Here, we present the first example where this is translated into a molecular porous liquid formed from organic cage molecules. Reduction of the cage window size by chemical synthesis switches the selectivity from Xe-selective to CH<sub>4</sub>-selective, which is understood using <sup>129</sup>Xe, <sup>1</sup>H, and pulsed-field gradient NMR spectroscopy.

Sign in / Sign up

Export Citation Format

Share Document