scholarly journals Textured nanoporous Mo:BiVO4 photoanodes with high charge transport and charge transfer quantum efficiencies for oxygen evolution

2016 ◽  
Vol 9 (4) ◽  
pp. 1412-1429 ◽  
Author(s):  
Vineet Nair ◽  
Craig L. Perkins ◽  
Qiyin Lin ◽  
Matt Law
Keyword(s):  
Charge Transfer ◽  
Charge Transport ◽  
Oxygen Evolution ◽  
Quantum Efficiency ◽  
Spin Coating ◽  
Transfer Efficiency ◽  
Coating Process ◽  
Spin Coating Process ◽  
High Charge ◽  
Catalyst Free

Nanoporous, catalyst-free BiVO4 films made by a simple spin coating process show a hole-limited charge transport quantum efficiency of ∼70% and >60% charge transfer efficiency for oxidizing water.

Improved charge transport and injection in a meso-superstructured solar cell by a tractable pre-spin-coating process

2015 ◽  
Vol 17 (37) ◽  
pp. 24092-24097 ◽  
Author(s):  
Nan Li ◽  
Haoyuan Li ◽  
Yu Li ◽  
Shufeng Wang ◽  
Liduo Wang
Keyword(s):  
Solar Cell ◽  
Charge Transport ◽  
Spin Coating ◽  
Precursor Solution ◽  
Electron Injection ◽  
Mesoporous Structure ◽  
Coating Process ◽  
Transport Pathways ◽  
Spin Coating Process

By pre-spin-coating a perovskite precursor solution, increased perovskite capacity in the mesoporous structure, enhanced electron injection and more charge transport pathways are realized.

Efficient catalysts for oxygen evolution derived from cobalt-based alloy nanochains

2018 ◽  
Vol 8 (9) ◽  
pp. 2427-2433 ◽  
Author(s):  
Xiaotao Yuan ◽  
Xin Wang ◽  
Muhammad Sohail Riaz ◽  
Chenlong Dong ◽  
Zhe Zhang ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Oxygen Evolution ◽  
Transfer Efficiency ◽  
High Charge ◽  
One Dimensional

One-dimensional nanomaterials are widely used in electrocatalysis owing to their high charge transfer efficiency.

Sodium chloride methanol solution spin-coating process for bulk-heterojunction polymer solar cells

2016 ◽  
Vol 25 (8) ◽  
pp. 088801
Author(s):  
Tong-Fang Liu ◽  
Yu-Feng Hu ◽  
Zhen-Bo Deng ◽  
Xiong Li ◽  
Li-Jie Zhu ◽  
...  
Keyword(s):  
Solar Cells ◽  
Sodium Chloride ◽  
Spin Coating ◽  
Bulk Heterojunction ◽  
Polymer Solar Cells ◽  
Methanol Solution ◽  
Coating Process ◽  
Spin Coating Process

scholarly journals Correlation between the Morphology of ZnO Layers and the Electroluminescence of Quantum Dot Light-Emitting Diodes

2019 ◽  
Vol 9 (21) ◽  
pp. 4539 ◽  
Author(s):  
Seongkeun Oh ◽  
Jiwan Kim
Keyword(s):  
Quantum Dot ◽  
Spin Coating ◽  
Light Emitting Diodes ◽  
Transport Layer ◽  
Electron Transport Layer ◽  
Coating Process ◽  
Inverted Structure ◽  
Light Emitting ◽  
Spin Coating Process ◽  
Ito Glass

The present work shows the effect of the ZnO layer morphology on inverted quantum dot light-emitting diodes (QLEDs) using different spin-coating processes. In the inverted structure of ITO/ZnO/QDs/CBP/MoO3/Al, ZnO nanoparticles were used as the electron transport layer. The utilization of a two-step spin-coating process to deposit a ZnO layer on a patterned ITO glass substrate resulted in an increase in the surface roughness of the ZnO layer and a decrease in the luminance of the QLEDs. However, the current efficiency of the device was enhanced by more than two-fold due to the reduced current density. Optimization of the ZnO spin-coating process can efficiently improve the optical and electrical properties of QLEDs.

scholarly journals Uniform and bright light emission from a 3D organic light-emitting device fabricated on a bi-convex lens by a vortex-flow-assisted solution-coating method

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Byoungchoo Park ◽  
Seo Yeong Na ◽  
In-Gon Bae
Keyword(s):  
Spin Coating ◽  
Vortex Flow ◽  
Line Tension ◽  
Fluorescent Light ◽  
Coating Process ◽  
Coating Solution ◽  
Light Emitting ◽  
Spin Coating Process ◽  
Convex Lens ◽  
Organic Light

AbstractWe herein present the results of a study on the novel fabrication process of uniform and homogeneous semiconducting polymer layers, in this case hole-injecting and fluorescent light-emitting layers that were produced by a simple solution-coating process for 3D conformal organic light-emitting diodes (3D OLEDs) on curvilinear surfaces. The solution-coating process used was a newly developed method of vortex-flow-assisted solution-coating with the support of spinning of the coating solution. It is shown that the vortex-flow-assisted spin-coating process can produce high-quality thin films at nanoscale thicknesses by controlling the liquid surface of the coating solutions, which can easily be adjusted by changing the spinning speed, even on complex curvilinear surfaces, i.e., a quasi-omnidirectional coating. This excellent film-forming ability without any serious film defects is mainly due to the reduction of line tension among the solution, air, and the substrate at the contact line due to vortex flows of the coating solution on the substrate during the vortex-spin-coating process. As a proof of concept, we present vortex-spin-coated 3D OLEDs fabricated on bi-convex lens substrates which exhibit excellent device performance with high brightness and current efficiency levels comparable to those of a conventional spin-coated 2D planar OLED on a flat substrate. It is also shown that the EL emission from the 3D OLED on the bi-convex lens substrate exhibits a diffusive Lambertian radiation pattern. The results here demonstrate that the vortex-flow-assisted spin-coating process is a promising approach for producing efficient and reliable next-generation OLEDs for 3D conformal opto-electronics.

Travelling wave solutions for a thin-film equation related to the spin-coating process

2017 ◽  
Vol 29 (3) ◽  
pp. 369-392 ◽  
Author(s):  
M. V. GNANN ◽  
H. J. KIM ◽  
H. KNÜPFER
Keyword(s):  
Contact Line ◽  
Spin Coating ◽  
Travelling Wave ◽  
Global Maximum ◽  
Coating Process ◽  
Average Height ◽  
Qualitative Properties ◽  
Spin Coating Process ◽  
Line Region ◽  
Thin Film Equation

We study a problem related to the spin-coating process in which a fluid coats a rotating surface. Our interest lies in the contact-line region for which we propose a simplified travelling wave approximation. We construct solutions to this problem by a shooting method that matches solution branches in the contact-line region and in the interior of the droplet. Furthermore, we prove uniqueness and qualitative properties of the solution connected to the fourth-order nature of the equation, such as a global maximum in the film height close to the contact line, elevated from the average height of the film.

A facile approach to alleviate photochemical degradation in high efficiency polymer solar cells

2015 ◽  
Vol 3 (31) ◽  
pp. 16313-16319 ◽  
Author(s):  
Wenchao Huang ◽  
Eliot Gann ◽  
Zai-Quan Xu ◽  
Lars Thomsen ◽  
Yi-Bing Cheng ◽  
...  
Keyword(s):  
Solar Cells ◽  
Chemical Stability ◽  
Spin Coating ◽  
High Efficiency ◽  
Polymer Solar Cells ◽  
Simple Approach ◽  
Coating Process ◽  
Photochemical Degradation ◽  
Solvent Treatment ◽  
Spin Coating Process

We report a simple approach to significantly improve the chemical stability of high efficiency PBDTTT-EFT:PC71BM solar cells. The introduction of an anti-solvent treatment during the spin-coating process induces the fast deposition of the active layer and the prompt removal of residual DIO from the film.

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