Lateral and Vertical Phase Separation Control of Thin-film Structures for Photovoltaics

2001 ◽  
Vol 665 ◽  
Author(s):  
A. C. Arias ◽  
J. D. MacKenzie ◽  
N. Corcoran ◽  
R. H. Friend
Keyword(s):  
Phase Separation ◽  
Spin Coating ◽  
Solution Viscosity ◽  
Separation Control ◽  
Nanometer Scale ◽  
Length Scale ◽  
Photovoltaic Devices ◽  
Photovoltaic Properties ◽  
Lateral Phase Separation ◽  
Photoluminescence Efficiency

ABSTRACTInvestigations on microscopic and photovoltaic properties of polyfluorene blends are presented here. The length scale of lateral phase separation is manipulated by control of solvent evaporation conditions. Photoluminescence efficiency measurements show that charge transfer is more effective in blends phase separated on the nanometer scale. Vertically segregated structures are obtained by a combination of solution viscosity and spin coating conditions. The external quantum efficiency of photovoltaic devices fabricated with vertically segregated blend is found to be 4 times higher than that of devices made with laterally segregated blends.

Structure evolution during phase separation in spin-coated ethylcellulose/hydroxypropylcellulose films

Soft Matter ◽  
2021 ◽  
Author(s):  
Pierre Carmona ◽  
Magnus Röding ◽  
Aila Särkkä ◽  
Christian von Corswant ◽  
Eva Olsson ◽  
...  
Keyword(s):  
Phase Separation ◽  
Drug Release ◽  
Film Thickness ◽  
Spin Coating ◽  
Good Control ◽  
Controlled Drug Release ◽  
Structure Evolution ◽  
Length Scale ◽  
Method Optimization

Porous phase-separated films made of ethylcellulose (EC) and hydroxypropylcellulose (HPC) for controlled drug release were made using spin-coating. The method optimization gave good control over the film thickness and the length scale.

scholarly journals Adhesion-induced lateral phase separation in membranes

2000 ◽  
Vol 3 (3) ◽  
pp. 259-271 ◽  
Author(s):  
S. Komura ◽  
D. Andelman
Keyword(s):  
Phase Separation ◽  
Lateral Phase Separation

Directed Self-Assembly of Silica Nanoparticles into Nanometer-Scale Patterned Surfaces Using Spin-Coating

2004 ◽  
Vol 16 (16) ◽  
pp. 1427-1432 ◽  
Author(s):  
D. Xia ◽  
A. Biswas ◽  
D. Li ◽  
S. R. J. Brueck
Keyword(s):  
Silica Nanoparticles ◽  
Self Assembly ◽  
Spin Coating ◽  
Nanometer Scale ◽  
Patterned Surfaces

scholarly journals Conformal Coating by Liquid Route on Three-Dimensional Topology

2018 ◽  
Author(s):  
Poirot Nathalie ◽  
Raynal Pierre-Ivan
Keyword(s):  
Spin Coating ◽  
Three Dimensional ◽  
Precursor Solution ◽  
Solution Viscosity ◽  
Chemical Solution ◽  
New Approach ◽  
Conformal Coating ◽  
Si Substrates ◽  
Aspect Ratios ◽  
Post Annealing

We demonstrated a new approach to the production of three-dimensional-coated patterns using liquid route. Metallic perovskite oxides were coated onto three-dimensional (3D) microstructured substrates with different aspect ratios. The success of the method relies on the solution viscosity monitored by adding viscous liquid. The process of oxide thin films consists in three steps: preparing the precursor solution, coating the solution by spin-coating process onto three-dimensional-Si substrates and post-annealing. The chemical solution 3D-coating is conformal.

Regulated phase separation in nanopatterned protein-polysaccharide thin films by spin coating

2020 ◽  
Vol 190 ◽  
pp. 110967 ◽  
Author(s):  
Russell A. Banta ◽  
Timothy W. Collins ◽  
Ricky Curley ◽  
John O'Connell ◽  
Paul W. Young ◽  
...  
Keyword(s):  
Thin Films ◽  
Phase Separation ◽  
Spin Coating

scholarly journals A Low-Cost, Non-hazardous Protocol for Surface Texturing of Glass Particles

2019 ◽  
Vol 67 (4) ◽  
Author(s):  
Anelechi Ibekwe ◽  
Yukie Tanino ◽  
Dubravka Pokrajac
Keyword(s):  
Low Cost ◽  
Packed Column ◽  
Surface Texturing ◽  
Nanometer Scale ◽  
Length Scale ◽  
Glass Spheres ◽  
Hard Particles ◽  
Microscope Images ◽  
Scanning Electron ◽  
Roughness Size

Abstract We present a cheap, efficient, and non-hazardous protocol for altering the roughness of hard particles at the nanometer-scale using a stone tumbler, a tool which is normally used for polishing stones. Six different textures were achieved by lining the tumbler with sandpaper of mean grit diameters $$d_{\mathrm{g}}=201$$dg=201, 58.5, 18.3, 12.6, and $$8.4\,\upmu \hbox {m}$$8.4μm. Two textures were created by tumbling a batch of glass spheres for 4 h and for 12 h with the $$12.6\,\upmu \hbox {m}$$12.6μm sandpaper; all other textures were established by tumbling for 12 h. Surface roughness was characterized by the integral length scale, $$\xi$$ξ, evaluated from 7 nm/pix resolution scanning electron microscope images. Roughness size increased from $$\xi = 24$$ξ=24 to 31 nm as the grit size decreased from $$d_{\mathrm{g}} = 201$$dg=201 to $$18.3\,\upmu \hbox {m}$$18.3μm, and then decreased to $$\xi = 6.4\,\hbox {nm}$$ξ=6.4nm at the smallest $$d_{\mathrm{g}}$$dg. The largest $$\xi \,(= 34\,\hbox {nm})$$ξ(=34nm) was achieved using a $$12.6\,\upmu \hbox {m}$$12.6μm sandpaper and the shorter tumbling time of 4 h. The permeability of a packed column of the particles broadly decreased with increasing $$\xi$$ξ, indicating that permeability decreases with increasing roughness size.

scholarly journals On the nanometer scale phase separation of a low-supersaturation Ni–Al–Cr alloy

2010 ◽  
Vol 90 (1-4) ◽  
pp. 219-235 ◽  
Author(s):  
Christopher Booth-Morrison ◽  
Yang Zhou ◽  
Ronald D. Noebe ◽  
David N. Seidman
Keyword(s):  
Phase Separation ◽  
Nanometer Scale

Solution processing of polymer semiconductor: Insulator blends-Tailored optical properties through liquid-liquid phase separation control

2014 ◽  
Vol 53 (4) ◽  
pp. 304-310 ◽  
Author(s):  
Christoph Hellmann ◽  
Neil D. Treat ◽  
Alberto D. Scaccabarozzi ◽  
Joseph Razzell Hollis ◽  
Franziska D. Fleischli ◽  
...  
Keyword(s):  
Optical Properties ◽  
Phase Separation ◽  
Liquid Phase ◽  
Liquid Phase Separation ◽  
Separation Control ◽  
Solution Processing ◽  
Polymer Semiconductor ◽  
Liquid Liquid Phase Separation
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