Nondestructive measurement of striation defect spacing using laser diffraction

2001 ◽  
Vol 16 (12) ◽  
pp. 3355-3360 ◽  
Author(s):  
Dylan E. Haas ◽  
Dunbar P. Birnie
Keyword(s):  
Spin Coating ◽  
Laser Light ◽  
Laser Diffraction ◽  
Thickness Variation ◽  
Coating Process ◽  
Defect Structures ◽  
Nondestructive Measurement ◽  
Simple Method ◽  
Striation Spacing ◽  
Diffraction Angle

A simple method is presented for measuring the characteristic spacing between striation defects that sometimes develop when coatings are deposited by the spin-coating process. Striation defects, because of their substantial regularity of thickness variation, are able to diffract laser light. By measuring the diffraction angle, it is possible to determine a characteristic spacing that corresponds to the most dominant spatial frequency for the striation defects that have formed. This diffraction technique is compared with other methods for determining the average striation spacing. This noncontact characterization technique may also be applicable to other regularly or quasi-regularly spaced defect structures that appear in coatings or other materials. The limits and accuracy of this technique are discussed in detail.

A simple method for shape modulation in microlens array fabrication via spin-coating process

2017 ◽  
Vol 24 (4) ◽  
pp. 1885-1889
Author(s):  
Shengzhou Huang ◽  
Mujun Li ◽  
Lianguan Shen ◽  
Jinfeng Qiu ◽  
Youquan Zhou
Keyword(s):  
Spin Coating ◽  
Microlens Array ◽  
Coating Process ◽  
Simple Method ◽  
Spin Coating Process ◽  
Array Fabrication ◽  
Shape Modulation

Tailoring the crystallinity of solution-processed 6,13-bis(triisopropylsilylethynyl)pentacene via controlled solidification

Soft Matter ◽  
2019 ◽  
Vol 15 (37) ◽  
pp. 7369-7373 ◽  
Author(s):  
Hye Su Kim ◽  
Jun Hwa Park ◽  
Wi Hyoung Lee ◽  
Hyun Ho Kim ◽  
Yeong Don Park
Keyword(s):  
Spin Coating ◽  
Coating Process ◽  
Simple Method ◽  
Solution Processed ◽  
Residual Solvent ◽  
Spin Coating Process ◽  
Molecular Ordering

Crystallinity of TIPS-pentacene is strongly enhanced by a simple method halting spin-coating process prior to the complete solidification. Residual solvent causes a tardy growth of TIPS-pentacene, resulting in greater molecular ordering.

Simple fabrication of a three-dimensional porous polymer film as a diffuser for organic light emitting diodes

Nanoscale ◽  
2014 ◽  
Vol 6 (23) ◽  
pp. 14446-14452 ◽  
Author(s):  
Byung Wan Lim ◽  
Min Chul Suh
Keyword(s):  
Polymer Film ◽  
Spin Coating ◽  
Three Dimensional ◽  
Cost Effective ◽  
Porous Polymer ◽  
Organic Light Emitting Diodes ◽  
Coating Process ◽  
Light Emitting ◽  
Organic Light ◽  
Ultrasonic Humidifier

We have investigated a simple and cost-effective fabrication method for a porous polymer film employing the spin-coating process during continuous supply of water droplets by an ultrasonic humidifier.

Solvent vapor assisted spin-coating: A simple method to directly achieve high mobility from P3HT based thin film transistors

2013 ◽  
Vol 184 ◽  
pp. 1-4 ◽  
Author(s):  
Hao Chang ◽  
Pengyue Wang ◽  
Haidong Li ◽  
Jidong Zhang ◽  
Donghang Yan
Keyword(s):  
Thin Film ◽  
Spin Coating ◽  
Thin Film Transistors ◽  
High Mobility ◽  
Simple Method ◽  
Solvent Vapor

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.

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