Guanidinium substitution-dependent phase transitions, ionic conductivity and dielectric properties of MAPbI3

2022 ◽  
Author(s):  
Fernando B Minussi ◽  
Eduardo M. Bertoleti ◽  
Saulo P Reis ◽  
J. Carvalho ◽  
Eudes Borges Araújo
Keyword(s):  
Phase Transitions ◽  
Dielectric Properties ◽  
Ionic Conductivity ◽  
The Past ◽  
Halide Perovskites

Over the past few years of boosting studies in halide perovskites, the formulation of guanidinium (GA+)-containing compounds has been proven to be an excellent strategy. A system in particular, namely...

Ionic conductivity and dielectric properties of bulk SPP-PEG hydrogel as Na+ ion based SPE material for energy storage applications

2021 ◽  
Author(s):  
Rudramani Tiwari ◽  
Dipendra Kumar Verma ◽  
Devendra Kumar ◽  
Shashikant Yadav ◽  
Krishna Kumar ◽  
...  
Keyword(s):  
Polyethylene Glycol ◽  
Energy Storage ◽  
Dielectric Properties ◽  
Ionic Conductivity ◽  
Green Chemistry ◽  
Sodium Polyphosphate ◽  
Na Ions ◽  
Energy Storage Applications

Green SPP-PEG hydrogel material, containing Na+ ions, has been synthesized by green chemistry methodology using sodium polyphosphate and polyethylene glycol in water. Hydrogel has amorphous morphology and sandwiched matrix with...

A Review on Stability of Inorganic Metal Halide Perovskites: Challenge and Opportunity for Stable Solar Cells

2021 ◽  
Author(s):  
Wanchun Xiang ◽  
Shengzhong Liu ◽  
Wolfgang Tress
Keyword(s):  
Solar Cells ◽  
High Temperature ◽  
Metal Halide ◽  
Inorganic Perovskite ◽  
The Past ◽  
Intrinsic Stability ◽  
Halide Perovskites

Inorganic perovskite based solar cells (PSCs) have been receiving unprecedented attention worldwide in the past several years due to their higher intrinsic stability towards high temperature and high theoretical power...

scholarly journals Thermal properties of metal-halide perovskites

2020 ◽  
Vol 8 (41) ◽  
pp. 14289-14311
Author(s):  
Tobias Haeger ◽  
Ralf Heiderhoff ◽  
Thomas Riedl
Keyword(s):  
Thermal Properties ◽  
Phase Transitions ◽  
Metal Halide ◽  
Halide Perovskites ◽  
Experimental Findings

The thermal properties of metal-halide perovskites are reviewed with respect to experimental findings, theoretical insights, dimensionalities, and phase transitions.

Phase Transitions and Dielectric Properties in Bi(Zn1/2Ti1/2)O3–(Na1-yLiy)NbO3Perovskite Solid Solutions

2009 ◽  
Vol 48 (3) ◽  
pp. 031401 ◽  
Author(s):  
Chien-Chih Huang ◽  
Naratip Vittayakorn ◽  
Anurak Prasatkhetragarn ◽  
Brady J. Gibbons ◽  
David P. Cann
Keyword(s):  
Phase Transitions ◽  
Dielectric Properties ◽  
Solid Solutions

Li and Nb codoping in dielectric properties and phase transitions of KTaO3: Reentrant dipolar glass and long-range dipole ordering

2001 ◽  
Vol 155 (1-4) ◽  
pp. 367-371
Author(s):  
V. Trepakov ◽  
M. Savinov ◽  
S. Kappahn ◽  
L. Jastrabik ◽  
P. Camagni ◽  
...  
Keyword(s):  
Phase Transitions ◽  
Dielectric Properties ◽  
Long Range ◽  
Dipole Ordering

Effects of complex additives on structure, phase transitions and dielectric properties of BSPT ceramics

2014 ◽  
Author(s):  
E. D. Politova ◽  
N. V. Golubko ◽  
G. M. Kaleva ◽  
A. V. Mosunov ◽  
S. Yu. Stefanovich ◽  
...  
Keyword(s):  
Phase Transitions ◽  
Dielectric Properties ◽  
Structure Phase

Colossal Barocaloric Effects with Ultralow Hysteresis in Two-Dimensional Metal–Halide Perovskites

2021 ◽  
Author(s):  
Jarad Mason ◽  
Jinyoung Seo ◽  
Ryan McGillicuddy ◽  
Adam Slavney ◽  
Selena Zhang ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Phase Transitions ◽  
Solid State ◽  
Hydrostatic Pressure ◽  
Metal Halide ◽  
Two Dimensional ◽  
Vapor Compression ◽  
Entropy Changes ◽  
Halide Perovskites ◽  
Solid State Cooling

Abstract Nearly 4,400 TWh of electricity—20% of the total consumed in the world—is used each year by refrigerators, air conditioners, and heat pumps for cooling. In addition to the 2.3 Gt of carbon dioxide emitted during the generation of this electricity, the vapor-compression-based devices that provided the bulk of this cooling emitted fluorocarbon refrigerants with a global warming potential equivalent to 1.5 Gt of carbon dioxide into the atmosphere. With population and economic growth expected to dramatically increase over the next several decades, the development of alternative cooling technologies with improved efficiency and reduced emissions will be critical to meeting global cooling needs in a more sustainable fashion. Barocaloric materials, which undergo thermal changes in response to applied hydrostatic pressure, offer the potential for solid-state cooling with high energy efficiency and zero direct emissions, as well as faster start-up times, quieter operation, greater amenability to miniaturization, and better recyclability than conventional vapor-compression systems. Efficient barocaloric cooling requires materials that undergo reversible phase transitions with large entropy changes, high sensitivity to hydrostatic pressure, and minimal hysteresis, the combination of which has been challenging to achieve in existing barocaloric materials. Here, we report a new mechanism for achieving colossal barocaloric effects near ambient temperature that exploits the large volume and conformational entropy changes of hydrocarbon chain-melting transitions within two-dimensional metal–halide perovskites. Significantly, we show how the confined nature of these order–disorder phase transitions and the synthetic tunability of layered perovskites can be leveraged to reduce phase transition hysteresis through careful control over the inorganic–organic interface. The combination of ultralow hysteresis (< 1.5 K) and high barocaloric coefficients (> 20 K/kbar) leads to large reversible isothermal entropy changes (> 200 J/kg•K) at record-low pressures (< 300 bar). We anticipate that these results will help facilitate the development of barocaloric cooling technologies and further inspire new materials and mechanisms for efficient solid-state cooling.

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