Insights into the interparticle mixing of CsPbBr3 and CsPbI3 nanocubes: halide ion migration and kinetics

Nanoscale ◽  
2020 ◽  
Vol 12 (40) ◽  
pp. 20840-20848
Author(s):  
Anamul Haque ◽  
Trupthi Devaiah Chonamada ◽  
Arka Bikash Dey ◽  
Pralay K. Santra
Keyword(s):  
Activation Energy ◽  
Ion Migration

Interparticle mixing of CsPbBr3 and CsPbI3 nanocrystals proceeds via the free oleylammonium halides, having an activation energy of 0.75 ± 0.05 eV.

High performance perovskite memristor by integrating tip shape contact

2021 ◽  
Author(s):  
Su-Ting Han ◽  
Jiangming Chen ◽  
Zihao Feng ◽  
Mingtao Luo ◽  
Junjie Wang ◽  
...  
Keyword(s):  
Activation Energy ◽  
High Performance ◽  
Random Access ◽  
Random Access Memory ◽  
Resistive Random Access Memory ◽  
Access Memory ◽  
Ion Migration ◽  
Halide Perovskite

Resistive random access memory (RRAM) based on hybrid organic-inorganic halide perovskite (HOIP) has recently gained significant interests due to its low activation energy of ion migration. HOIP RRAM has been...

scholarly journals Elucidation of the role of guanidinium incorporation in single-crystalline MAPbI3 perovskite on ion migration and activation energy

2020 ◽  
Vol 22 (20) ◽  
pp. 11467-11473 ◽  
Author(s):  
Apurba Mahapatra ◽  
Rashmi Runjhun ◽  
Jan Nawrocki ◽  
Janusz Lewiński ◽  
Abul Kalam ◽  
...  
Keyword(s):  
Activation Energy ◽  
Electrochemical Impedance Spectroscopy ◽  
Impedance Spectroscopy ◽  
Electrochemical Impedance ◽  
Temperature Dependent ◽  
Ion Migration ◽  
Single Crystalline

We have studied the effect of guanidinium incorporation in a single-crystalline MAPbI3 perovskite on ion migration using temperature-dependent electrochemical impedance spectroscopy.

scholarly journals The effect of undecaprenol on bilayer lipid membranes.

1994 ◽  
Vol 41 (3) ◽  
pp. 351-358 ◽  
Author(s):  
T Janas ◽  
T Chojnacki ◽  
E Swiezewska ◽  
T Janas
Keyword(s):  
Activation Energy ◽  
Lipid Membranes ◽  
Electrical Potential ◽  
Membrane Conductance ◽  
Transference Numbers ◽  
Bilayer Lipid Membranes ◽  
Ion Migration ◽  
Bilayer Lipid ◽  
Membrane Breakdown ◽  
Transmembrane Electrical Potential

The influence of undecaprenol on phosphatidylcholine macrovesicular bilayer lipid membranes has been studied by electrophysiological techniques. The current-voltage characteristics, ionic transference numbers, the membrane conductance-temperature relationships and the membrane breakdown voltage were measured. The permeability coefficients for Na+ and Cl- ions, the activation energy of ion migration across the membrane, the membrane hydrophobic thickness and the membrane Young's modulus were determined. Undecaprenol increases membrane conductance, membrane capacitance, membrane ionic permeability and membrane elastic deformability, decreases the activation energy, membrane hydrophobic thickness and membrane electromechanical stability, and does not change membrane selectivity. The formation by undecaprenyl molecules of fluid microdomains modulating membrane hydrophobic thickness is postulated. The data suggest that the behaviour of undecaprenol in membranes is regulated by transmembrane electrical potential.

scholarly journals Quantification of ion migration in CH3NH3PbI3 perovskite solar cells by transient capacitance measurements

2019 ◽  
Vol 6 (7) ◽  
pp. 1497-1503 ◽  
Author(s):  
Moritz H. Futscher ◽  
Ju Min Lee ◽  
Lucie McGovern ◽  
Loreta A. Muscarella ◽  
Tianyi Wang ◽  
...  
Keyword(s):  
Activation Energy ◽  
Solar Cells ◽  
Perovskite Solar Cells ◽  
Energy Concentration ◽  
Ion Migration ◽  
Capacitance Measurements ◽  
Ion Drift ◽  
Transient Capacitance ◽  
Mobile Ions ◽  
And Diffusion

We quantify activation energy, concentration, and diffusion coefficient of mobile ions in MAPbI3 perovskite solar cells using transient ion-drift measurements.

Growth of nanocrystalline PbS within a glass

1997 ◽  
Vol 12 (10) ◽  
pp. 2507-2510 ◽  
Author(s):  
M. Mukherjee ◽  
A. Datta ◽  
D. Chakravorty
Keyword(s):  
Activation Energy ◽  
Particle Size ◽  
Band Gap ◽  
Sodium Ion ◽  
Oxide Glass ◽  
Dc Resistivity ◽  
Ion Migration ◽  
Temperature Range ◽  
Resistivity Variation ◽  
O 15

Nanocrystalline PbS has been grown within a phase-separated oxide glass of composition 10 Na2O, 15 PbO, 17 CaO, 3 Bi2O3, and 55 SiO2 (in mole %) by passing H2S gas over it at temperatures varying from 773 to 943 K. The particle size ranged from 2.5 to 12.9 nm. The dc resistivity of composites of nanocrystalline PbS and the phase separated glass has been measured over the temperature range 300 to 670 K. The resistivity variation in the temperature range 550 to 670 K is characterized by the sodium ion migration in the glass with an activation energy, ∼1.2 eV. The resistivity in the range 300 to 500 K was controlled by conduction in PbS particles with the estimated band gap showing an increase with a decrease in the particle size.

Electron Mobilities and Ranges in Liquid Ethers: Ion-like and Conduction Band Mobilities

1975 ◽  
Vol 53 (9) ◽  
pp. 1263-1274 ◽  
Author(s):  
Jean-Pol Dodelet ◽  
Gordon R. Freeman
Keyword(s):  
Activation Energy ◽  
Conduction Band ◽  
Low Temperatures ◽  
Optical Excitation ◽  
Relative Increase ◽  
Dielectric Constants ◽  
Thermal Excitation ◽  
Butyl Ether ◽  
Ion Migration ◽  
Free Ion

The free ion yields in X irradiated ethers are larger than those in alkanes because the dielectric constants of the former liquids are greater than those of the latter. The relative increase of the free ion yield with temperature is smaller in ethers than in alkanes because the dielectric constants decrease more rapidly with increasing temperature in the former. The density normalized penetration range (thermalization length) bGPd of the secondary electrons in dimethyl ether (DME) is 3.5 × 10−7 g/cm2. As the length of the n-alkyl groups on the ether is increased bGPd increases towards the value obtained for long chain n-alkanes, 4.5 × 10−7 g/cm2. Electron mobilities ue showed two types of behavior: (i) at low temperatures ue approaches a value of about 2u−, where u− is the mobility of the anions formed in the irradiated liquid; (ii) at higher temperatures the ratio ue/u− increases with temperature, and equals 21 in di-n-butyl ether (DBE) at 375 K. The activation energy of electron migration at low temperatures (ion-like mechanism) is similar to that of ion migration, 2–3 kcal/mol, while at high temperatures it increases to ∼6 kcal/mol. The larger activation energy is attributed to thermal excitation of electrons from the solvated state into a conduction band, and is equal to one-half of the optical excitation energy of the solvated electrons. Electrons in water, alcohols, and ammonia at 300 K migrate by the ion-like mechanism. Electrons in alkanes migrate almost exclusively by the conduction band mechanism. A plot of the Arrhenius temperature coefficient of electron mobility against mobility in different liquids at a given temperature displays a maximum which is temperature dependent.

scholarly journals Электрофизические характеристики многослойных мемристивных наноструктур на основе стабилизированного иттрием диоксида циркония и оксида тантала

2020 ◽  
Vol 90 (2) ◽  
pp. 298
Author(s):  
С.В. Тихов ◽  
А.И. Белов ◽  
Д.С. Королев ◽  
И.Н. Антонов ◽  
А.А. Сушков ◽  
...  
Keyword(s):  
Activation Energy ◽  
Electric Field ◽  
Resistive Switching ◽  
Layer Structure ◽  
Ion Migration ◽  
Carrier Trapping ◽  
Migration Polarization ◽  
Self Assembled

The electrophysical characteristics of multilayer memristive structure Au/Ta/ZrO2(Y)/TaOx/TiN have been studied. The effects of electron and ion electrification associated with carrier trapping on traps and ion migration polarization in a dielectric are found. The effect of traps located in dielectrics on the effects of electroforming and resistive switching is established. The values of activation energy and concentrations for traps and ions are determined. The phenomenon of stabilization of resistive switching, which is associated with the features of the two-layer structure of YSZ/TaOx and self-assembled Ta nanoclusters, is found. Nanoclusters play the role of electric field concentrators in the process of electroforming and subsequent resistive switching.

Ionic Conductivity Study on the New High Oxide Conducting Perovskite LaGaO3

1998 ◽  
Vol 527 ◽  
Author(s):  
G.V.M. Kiruthika ◽  
U.V. Varadaraju
Keyword(s):  
Activation Energy ◽  
Ionic Conductivity ◽  
Single Phase ◽  
Ion Conductivity ◽  
Lanthanum Gallate ◽  
Migration Energy ◽  
Ion Migration ◽  
Oxide Ion Conductivity ◽  
Unit Cell Size ◽  
Oxide Ion

ABSTRACTOxide ion conductivity studies have been done on the Lanthanum Gallate based compounds. Yttrium substitution at the Ga site has been attempted to increase the unit cell size. Single phase was obtained for limited Y substituion i.e., La0.9Sr0.1Ga0.7Y0.1Mg0.2O3-x. It is found that the activation energy for the oxide ion conductivity has decreased for this composition. Based on the tolerance factor and B-site radius values, the migration energies were obtained for the LaGaO3 based perovskites. It is observed that migration energy has been significantly reduced upon substitution at the B-site. Absence of an enhancement in the conductivity with Yttrium substitution could be due to the vaccancy ordering inhibiting the oxide ion migration.

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