Predicting the Morphology of Perovskite Thin Films Produced by Sequential Deposition Method: A Crystal Growth Dynamics Study

2017 ◽  
Vol 29 (3) ◽  
pp. 1165-1174 ◽  
Author(s):  
Hyomin Ko ◽  
Dong Hun Sin ◽  
Min Kim ◽  
Kilwon Cho
Keyword(s):  
Thin Films ◽  
Crystal Growth ◽  
Growth Dynamics ◽  
Deposition Method ◽  
Sequential Deposition

A Novel Preparation Method of CH3NH3PbI3 Thin Films for Perovskite Solar Cell

2018 ◽  
Vol 759 ◽  
pp. 54-58 ◽  
Author(s):  
Wei Liang Zhao
Keyword(s):  
Thin Films ◽  
Solar Cell ◽  
Spin Coating ◽  
Preparation Method ◽  
Power Conversion ◽  
Perovskite Solar Cell ◽  
Emission Peak ◽  
Deposition Method ◽  
Sequential Deposition

A novel two-step sequential deposition method is proposed for the preparation of CH3NH3PbI3 for perovskite solar cell. In order to increase the crystallinity of the PbI2 film, rapidly drop the anhydrous chlorobenzene to the center of the substrate at 6 seconds of spin coating. Ultimately, the quality of the CH3NH3PbI3 film is improved. Through the transmission spectrum of CH3NH3PbI3 thin films, it is clear to see the use of the additive reduces the transmittance of the film. The PL spectroscopy of CH3NH3PbI3 thin films dropping with different additives shows that CH3NH3PbI3 thin films all have an emission peak at 768nm. The J-V test curve of the perovskite solar cell shows that the use of the additive improves the power conversion efficiency.

Enhanced efficiency of planar perovskite solar cells via a two-step deposition using DMF as an additive to optimize the crystal growth behavior

2017 ◽  
Vol 5 (25) ◽  
pp. 13032-13038 ◽  
Author(s):  
Jiajie Mo ◽  
Chunfu Zhang ◽  
Jingjing Chang ◽  
Haifeng Yang ◽  
He Xi ◽  
...  
Keyword(s):  
Solar Cells ◽  
Crystal Growth ◽  
Polar Solvent ◽  
Perovskite Solar Cells ◽  
Growth Behavior ◽  
Deposition Method ◽  
High Quality ◽  
Sequential Deposition ◽  
Solvent Additive ◽  
Crystal Growth Behavior

We present a facile way towards the use of the polar solvent additive in the inter-diffusion two-step sequential deposition method for a high quality perovskite film.

Cristal-growth dynamics of n-doped gaAs

1992 ◽  
Vol 50 (2) ◽  
pp. 1544-1545
Author(s):  
Pham V. Huong ◽  
Stéphanie Bouchet ◽  
Jean-Claude Launay
Keyword(s):  
Crystal Growth ◽  
Spatial Resolution ◽  
Epitaxial Layer ◽  
Outer Surface ◽  
Gaas Substrate ◽  
Structural Modification ◽  
Growth Dynamics ◽  
Argon Laser ◽  
High Anisotropy ◽  
Crystal Gaas

Microstructure of epitaxial layers of doped GaAs and its crystal growth dynamics on single crystal GaAs substrate were studied by Raman microspectroscopy with a Dilor OMARS instrument equipped with a 1024 photodiode multichannel detector and a ion-argon laser Spectra-Physics emitting at 514.5 nm.The spatial resolution of this technique, less than 1 μm2, allows the recording of Raman spectra at several spots in function of thickness, from the substrate to the outer deposit, including areas around the interface (Fig.l).The high anisotropy of the LO and TO Raman bands is indicative of the orientation of the epitaxial layer as well as of the structural modification in the deposit and in the substrate at the interface.With Sn doped, the epitaxial layer also presents plasmon in Raman scattering. This fact is already very well known, but we additionally observed that its frequency increases with the thickness of the deposit. For a sample with electron density 1020 cm-3, the plasmon L+ appears at 930 and 790 cm-1 near the outer surface.

Preparation of Thin Films of TiO2 Nanoparticles using Electrophoresis Deposition Method

2009 ◽  
Vol 129 (9) ◽  
pp. 620-626
Author(s):  
Kazuatsu Ito ◽  
Yuuki Sato ◽  
Motonari Adachi ◽  
Shinzo Yoshikado
Keyword(s):  
Thin Films ◽  
Tio2 Nanoparticles ◽  
Deposition Method ◽  
Electrophoresis Deposition

scholarly journals Crystal growth of clathrate hydrate formed with H2 + CO2 mixed gas and tetrahydropyran

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Meku Maruyama ◽  
Riku Matsuura ◽  
Ryo Ohmura
Keyword(s):  
Crystal Growth ◽  
Synthesis Gas ◽  
Water System ◽  
Hydrate Formation ◽  
Growth Dynamics ◽  
Operating Conditions ◽  
Mixed Gas ◽  
Thermodynamic Conditions ◽  
The Individual ◽  
And Storage

AbstractHydrate-based gas separation technology is applicable to the CO2 capture and storage from synthesis gas mixture generated through gasification of fuel sources including biomass. This paper reports visual observations of crystal growth dynamics and crystal morphology of hydrate formed in the H2 + CO2 + tetrahydropyran (THP) + water system with a target for developing the hydrate-based CO2 separation process design. Experiments were conducted at a temperature range of 279.5–284.9 K under the pressure of 4.9–5.3 MPa. To simulate the synthesis gas, gas composition in the gas phase was maintained around H2:CO2 = 0.6:0.4 in mole fraction. Hydrate crystals were formed and extended along the THP/water interface. After the complete coverage of the interface to shape a polycrystalline shell, hydrate crystals continued to grow further into the bulk of liquid water. The individual crystals were identified as hexagonal, tetragonal and other polygonal-shaped formations. The crystal growth rate and the crystal size varied depending on thermodynamic conditions. Implications from the obtained results for the arrangement of operating conditions at the hydrate formation-, transportation-, and dissociation processes are discussed.

High pressure RHEED study on the initial structure and growth dynamics of Y Ba2Cu3O7−δ thin films on SrTiO3 (001)

2012 ◽  
Vol 152 (6) ◽  
pp. 478-482 ◽  
Author(s):  
J. Li ◽  
W. Peng ◽  
Ke Chen ◽  
Y. Zhang ◽  
L.M. Cui ◽  
...  
Keyword(s):  
Thin Films ◽  
High Pressure ◽  
Growth Dynamics ◽  
Initial Structure
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