scholarly journals Effect of Processing Technique Factors on Structure and Photophysical Properties of Perovskite Absorption Layer by Using Two-Step Spin-Coating Method

Crystals ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 761
Author(s):  
Zixiao Zhou ◽  
Xiaoping Zou ◽  
Jialin Zhu ◽  
Jin Cheng ◽  
Haiyan Ren ◽  
...  
Keyword(s):  
Spin Coating ◽  
Perovskite Phase ◽  
Photophysical Properties ◽  
Precursor Solution ◽  
Coating Process ◽  
High Concentration ◽  
Inorganic Hybrid ◽  
Spin Coating Process ◽  
Enhanced Absorption ◽  
Hybrid Perovskite

The investigation of crystal growth is crucial for us to improve the film quality and photophysical properties of CH3NH3PbI3 (MAPbI3). In the two-step spin-coating process, the crystal structure could be modulated by controlling the growth conditions of PbI2 and CH3NH3I (MAI) layers. In this paper, the PbI2 layer was treated with annealing under different times. A liquid–liquid diffusion (LLD) mechanism is proposed to modify the deposition of MAI precursor solution and enhance the flatness of organic–inorganic hybrid perovskite film. Furthermore, the perovskite films are prepared using different concentrations of MAI. The evolution process of perovskite structure is observed by modulating the concentration of MAI. The spin-coating of moderate MAI tends to form high quality MAPbI3 films with enhanced absorption and carrier extraction capabilities. The high concentration of MAI would cause the perovskite phase transition, which provides a novel perspective to modulate the structure of organic–inorganic hybrid perovskite in the two-step spin-coating process, although it deteriorates the device performance.

scholarly journals Effect of Aging Time on the Synthesis of Fe-doped TiO2 Thin Films by Spin Coating Method

2016 ◽  
Vol 1 ◽  
Author(s):  
Dahyunir Dahlan
Keyword(s):  
Thin Film ◽  
Aging Time ◽  
Spin Coating ◽  
Anatase Phase ◽  
Precursor Solution ◽  
Coating Process ◽  
Titanium Butoxide ◽  
Spin Coating Process ◽  
Spin Coating Method ◽  
Coating Method

<p>The synthesis of Fe-doped TiO<sub>2</sub> thin film using spin coating method was studied. Effects of aging time on the deposited thin film were investigated. Titanium butoxide (C<sub>16</sub>H<sub>36</sub>O<sub>4</sub>Ti) as a precursor solution was mixed with the FeCl<sub>3</sub>. Spin coating process was carried out on three types of precursor solution: (1) spin-coating process performed immediately after the precursor solution was made, (2) spin-coating process performed after solution was aged for 24 hours, (3) aged for 24 and (4) spin-coating after aging the precursor for 72 hours. Heating was carried out on the resulting thin film at temperature of 400 °C. The morphology of TiO<sub>2</sub> layers was characterized using Scanning Electron Microscope (SEM) and Atomic Force Microscope (AFM). Elemental and phase composition of the films was determined using EDX and X-ray diffraction (XRD). We found that the best TiO<sub>2</sub> layer is obtained when spin-coating process is done after aging the precursor for 72 hours. The layer shows a more uniform particle distribution on the substrate and a more monodisperse particle size dominated by the anatase phase.</p>

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.

scholarly journals Effect of Aging Time on the Synthesis of Fe-doped TiO2 Thin Films by Spin Coating Method

2016 ◽  
Vol 1 (1) ◽  
Author(s):  
Dahyunir Dahlan
Keyword(s):  
Thin Film ◽  
Aging Time ◽  
Spin Coating ◽  
Anatase Phase ◽  
Precursor Solution ◽  
Coating Process ◽  
Titanium Butoxide ◽  
Spin Coating Process ◽  
Spin Coating Method ◽  
Coating Method

<p>The synthesis of Fe-doped TiO<sub>2</sub> thin film using spin coating method was studied. Effects of aging time on the deposited thin film were investigated. Titanium butoxide (C<sub>16</sub>H<sub>36</sub>O<sub>4</sub>Ti) as a precursor solution was mixed with the FeCl<sub>3</sub>. Spin coating process was carried out on three types of precursor solution: (1) spin-coating process performed immediately after the precursor solution was made, (2) spin-coating process performed after solution was aged for 24 hours, (3) aged for 24 and (4) spin-coating after aging the precursor for 72 hours. Heating was carried out on the resulting thin film at temperature of 400 °C. The morphology of TiO<sub>2</sub> layers was characterized using Scanning Electron Microscope (SEM) and Atomic Force Microscope (AFM). Elemental and phase composition of the films was determined using EDX and X-ray diffraction (XRD). We found that the best TiO<sub>2</sub> layer is obtained when spin-coating process is done after aging the precursor for 72 hours. The layer shows a more uniform particle distribution on the substrate and a more monodisperse particle size dominated by the anatase phase.</p>

Titania/Ormosils Organic-Inorganic Hybrid Thin Films Doped with Azobenzene Small Molecules for Optical Switch Applications

2007 ◽  
Vol 31 ◽  
pp. 11-13
Author(s):  
Wen Xiu Que ◽  
M. Sun ◽  
C.Y. Jia ◽  
L. Cheng ◽  
Zhuo Sun ◽  
...  
Keyword(s):  
Thin Films ◽  
Small Molecules ◽  
Spin Coating ◽  
Optical Switch ◽  
Morphological Properties ◽  
Propagation Mode ◽  
Coating Process ◽  
Inorganic Hybrid ◽  
Spin Coating Process ◽  
Hybrid Thin Films

Titania/organically modified silanes (ormosils) organic-inorganic hybrid thin films doped with azobenzene small molecules are prepared by a low temperature sol-gel spin-coating process for optical switch applications. Acid-catalyzed solutions of γ-glycidoxypropyltrimethoxysilane and methyltrimethoxysilane mixed with tetrapropyl orthotitanate are used as matrix precursors. Atomic force microscopy is used to study the morphological properties of the hybrid thin films. Results indicate that crack-free thin films with a thickness of about 1.3μm can be obtained by a single spin-coating process after a low heat treatment temperature. The propagation mode properties of the hybrid thin films are also studied by employing a prism coupling technique. The photo-responsive properties of the hybrid films baked at different temperatures are induced by an irradiation with UV light and subsequent visible light.

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.

Sign in / Sign up

Export Citation Format

Share Document