Successive near-room-temperature dielectric phase transitions in a lead-free hybrid perovskite-like compound

2019 ◽  
Vol 6 (1) ◽  
pp. 233-237 ◽  
Author(s):  
Jing Zhang ◽  
Shiguo Han ◽  
Xitao Liu ◽  
Chengmin Ji ◽  
Kewen Tao ◽  
...  
Keyword(s):  
Phase Transitions ◽  
Room Temperature ◽  
Lead Free ◽  
Hybrid Compound ◽  
Inorganic Hybrid ◽  
Dielectric Phase ◽  
Hybrid Perovskite ◽  
Successive Phase

We have reported a lead-free organic–inorganic hybrid compound, (hexamethyleneimine)2BiBr5 (1), which undergoes three successive phase transitions in the vicinity of room temperature.

[NH2CHNH2]3Sb2I9: a lead-free and low-toxicity organic–inorganic hybrid ferroelectric based on antimony(iii) as a potential semiconducting absorber

2020 ◽  
Vol 7 (8) ◽  
pp. 1780-1789 ◽  
Author(s):  
Przemysław Szklarz ◽  
Ryszard Jakubas ◽  
Anna Gągor ◽  
Grażyna Bator ◽  
Jakub Cichos ◽  
...  
Keyword(s):  
Phase Transitions ◽  
Room Temperature ◽  
Lead Free ◽  
Ferroelectric Crystal ◽  
Inorganic Hybrid ◽  
Complex Sequence ◽  
Low Toxicity

A novel room-temperature ferroelectric crystal with the complex sequence of phase transitions.

(C3N2H5)3Sb2I9 and (C3N2H5)3Bi2I9 : Ferroelastic Lead-Free Hybrid Perovskite-Like Materials as the Potential Semiconducting Absorbers

2022 ◽  
Author(s):  
Przemyslaw Szklarz ◽  
Ryszard Jakubas ◽  
Wojciech Medycki ◽  
Anna Gągor ◽  
Jakub Cichos ◽  
...  
Keyword(s):  
Phase Transitions ◽  
Structural Phase ◽  
Lead Free ◽  
Structural Phase Transitions ◽  
Inorganic Hybrid ◽  
Hybrid Perovskite ◽  
Hybrid Crystals

We have synthesised and characterised novel organic-inorganic hybrid crystals: (C3N2H5)3Sb2I9 and (C3N2H5)3Bi2I9 (PSI and PBI). The thermal DSC, and TG analyses indicate four structural phase transitions (PTs) at 366.8/366.2, 274.6/275.4,...

Sequential dielectric phase transitions induced by the vibrations of water molecules in an organic–inorganic hybrid halide (N-(2-ammoniumethyl)piperazinium) CuCl5·2H2O

2017 ◽  
Vol 46 (31) ◽  
pp. 10462-10468 ◽  
Author(s):  
Zhongxia Wang ◽  
Yang Lu ◽  
Zainab Zafar ◽  
Yu-Ling Liu ◽  
Hai-Peng Chen ◽  
...  
Keyword(s):  
Phase Transitions ◽  
Water Molecules ◽  
Hybrid Compound ◽  
Inorganic Hybrid ◽  
Dielectric Phase

An organic–inorganic hybrid compound (N-(2-ammoniumethyl)piperazinium)CuCl5·2H2O shows sequential dielectric phase transitions induced by the vibrations of water molecules.

scholarly journals Exploring a lead-free organic–inorganic semiconducting hybrid with above-room-temperature dielectric phase transition

RSC Advances ◽  
2020 ◽  
Vol 10 (30) ◽  
pp. 17492-17496
Author(s):  
Yuyin Wang ◽  
Shiguo Han ◽  
Xitao Liu ◽  
Zhenyue Wu ◽  
Zhihua Sun ◽  
...  
Keyword(s):  
Phase Transition ◽  
Room Temperature ◽  
Light Emitting Diodes ◽  
Lead Free ◽  
Inorganic Hybrid ◽  
Light Emitting ◽  
Dielectric Phase ◽  
Halide Perovskites ◽  
Optoelectronic Applications ◽  
Lead Halide

Recently, organic–inorganic hybrid lead halide perovskites have attracted great attention for optoelectronic applications, such as light-emitting diodes, photovoltaics and optoelectronics.

Near-room-temperature tunable dielectric response induced by dual phase transitions in a lead-free hybrid: (C3H8N)2SbBr5

CrystEngComm ◽  
2019 ◽  
Vol 21 (24) ◽  
pp. 3740-3744 ◽  
Author(s):  
Maofan Li ◽  
Bing Teng ◽  
Shiguo Han ◽  
Tao Yang ◽  
Yaobin Li ◽  
...  
Keyword(s):  
Phase Transitions ◽  
Dielectric Response ◽  
Room Temperature ◽  
Lead Free ◽  
Dual Phase ◽  
Inorganic Hybrid

We report a new lead-free organic–inorganic hybrid that undergoes the dual phase transitions near room temperature.

Successive Phase Transitions and Dual Dielectric Switching in an Organic–Inorganic Hybrid Perovskite

2020 ◽  
Vol 59 (24) ◽  
pp. 18174-18180
Author(s):  
Lin Zhou ◽  
Rui-Xia Li ◽  
Ping-Ping Shi ◽  
Qiong Ye ◽  
Da-Wei Fu
Keyword(s):  
Phase Transitions ◽  
Inorganic Hybrid ◽  
Hybrid Perovskite ◽  
Successive Phase

Ferroelastic domains and phase transitions in organic–inorganic hybrid perovskite CH3NH3PbBr3

2021 ◽  
Author(s):  
Maryam Bari ◽  
Alexei A. Bokov ◽  
Zuo-Guang Ye
Keyword(s):  
Phase Transitions ◽  
Electric Field ◽  
Light Microscopy ◽  
Domain Structure ◽  
Polarized Light ◽  
External Stress ◽  
Polarized Light Microscopy ◽  
Inorganic Hybrid ◽  
Hybrid Perovskite ◽  
Ferroelastic Domains

Polarized light microscopy reveals twin domains and symmetry of the phases in CH3NH3PbBr3 crystal; domain structure remains unresponsive to electric field but changes under external stress, confirming ferroelasticity while ruling out ferroelectricity.

Temperature Sensitive and Reversible Halide Ion Exchange in Inorganic–Organic Hybrid CH3NH3PbI3−xBrx Mixed-Halide Perovskite

2021 ◽  
Vol 16 (4) ◽  
pp. 670-674
Author(s):  
Shuting Cui ◽  
Xun Sun ◽  
SiWen Tao ◽  
Huawei Zhou ◽  
Jie Yin ◽  
...  
Keyword(s):  
High Temperature ◽  
Ion Exchange ◽  
Band Gap ◽  
Room Temperature ◽  
Temperature Sensitive ◽  
Mechanism Study ◽  
Interesting Phenomenon ◽  
Inorganic Hybrid ◽  
Hybrid Perovskite ◽  
Halide Perovskite

Ion exchange of organic-inorganic hybrid perovskite plays a significant role in controlling the performance of materials ant its devices. In this study, an interesting phenomenon was observed that the precipitate in suspension (CH3NH3PbI3−xBrx in γ-butyrolactone) brought out different colors at high and room temperature. The mechanism study appears that the phenomenon is controlled by temperature sensitive and reversible halide ion exchange in organic-inorganic hybrid CH3NH3PbI3−xBrx mixed-halide perovskite. The results of structure phase, element composition morphology and band gap illustrate that high temperature 55 °C is beneficial to the increasing of I content in MAPbI3−xBrx and room temperature or lower is advantageous to increasing of Br content in MAPbI3−xBrx. Compared with MAPbI0.76Br2.24 precipitate acquired at room temperature, MAPbI1.17Br1.83 precipitate got at high temperature illustrate wider lattice spacing, better crystallinity, better morphology and narrower band gap. The results and findings in this study will prompt the interest of readers or experts in the field of organic-inorganic hybrid perovskite materials and related optoelectronic applications.

The structures and phase transitions in 4-aminopyridinium tetraaquabis(sulfato)iron(III), (C5H7N2)[FeIII(H2O)4(SO4)2]

2019 ◽  
Vol 75 (6) ◽  
pp. 1144-1151
Author(s):  
Tamara J. Bednarchuk ◽  
Wolfgang Hornfeck ◽  
Vasyl Kinzhybalo ◽  
Zhengyang Zhou ◽  
Michal Dušek ◽  
...  
Keyword(s):  
Phase Transitions ◽  
Single Crystal ◽  
Room Temperature ◽  
Variable Temperature ◽  
Temperature Phase ◽  
X Ray Diffraction ◽  
Scanning Calorimetry ◽  
Hybrid Compound ◽  
Space Group ◽  
X Ray

The organic–inorganic hybrid compound 4-aminopyridinium tetraaquabis(sulfato)iron(III), (C5H7N2)[FeIII(H2O)4(SO4)2] (4apFeS), was obtained by slow evaporation of the solvent at room temperature and characterized by single-crystal X-ray diffraction in the temperature range from 290 to 80 K. Differential scanning calorimetry revealed that the title compound undergoes a sequence of three reversible phase transitions, which has been verified by variable-temperature X-ray diffraction analysis during cooling–heating cycles over the temperature ranges 290–100–290 K. In the room-temperature phase (I), space group C2/c, oxygen atoms from the closest Fe-atom environment (octahedral) were disordered over two equivalent positions around a twofold axis. Two intermediate phases (II), (III) were solved and refined as incommensurately modulated structures, employing the superspace formalism applied to single-crystal X-ray diffraction data. Both structures can be described in the (3+1)-dimensional monoclinic X2/c(α,0,γ)0s superspace group (where X is ½, ½, 0, ½) with modulation wavevectors q = (0.2943, 0, 0.5640) and q = (0.3366, 0, 0.5544) for phases (II) and (III), respectively. The completely ordered low-temperature phase (IV) was refined with the twinning model in the triclinic P{\overline 1} space group, revealing the existence of two domains. The dynamics of the disordered anionic substructure in the 4apFeS crystal seems to play an essential role in the phase transition mechanisms. The discrete organic moieties were found to be fully ordered even at room temperature.

Lead-free hybrid ferroelectric material based on formamidine: [NH2CHNH2]3Bi2I9

2019 ◽  
Vol 7 (10) ◽  
pp. 3003-3014 ◽  
Author(s):  
Przemysław Szklarz ◽  
Anna Gągor ◽  
Ryszard Jakubas ◽  
Piotr Zieliński ◽  
Anna Piecha-Bisiorek ◽  
...  
Keyword(s):  
Phase Transitions ◽  
Room Temperature ◽  
Ferroelectric Material ◽  
Lead Free ◽  
Ferroelectric Crystals ◽  
Complex Sequences

Novel room-temperature ferroelectric crystals with complex sequences of phase transitions.

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