Effects of organic cations on the defect physics of tin halide perovskites

2017 ◽  
Vol 5 (29) ◽  
pp. 15124-15129 ◽  
Author(s):  
Tingting Shi ◽  
Hai-Shan Zhang ◽  
Weiwei Meng ◽  
Qiang Teng ◽  
Meiyue Liu ◽  
...  
Keyword(s):  
Organic Cations ◽  
Schematic Diagram ◽  
Bond Lengths ◽  
Halide Perovskites

The schematic diagram of different Sn-5s and I-5p antibonding strengths of FASnI3 and MASnI3 due to various bond lengths of Sn–I.

Bulky Organic Cations Engineered Lead-halide Perovskites: A Review on Dimensionality and Optoelectronic Applications

2021 ◽  
pp. 100759
Author(s):  
Hock Beng Lee ◽  
Neetesh Kumar ◽  
Barkha Tyagi ◽  
Siwei He ◽  
Rishabh Sahani ◽  
...  
Keyword(s):  
Organic Cations ◽  
Halide Perovskites ◽  
Optoelectronic Applications ◽  
Lead Halide

A study on the effects of mixed organic cations on the structure and properties in lead halide perovskites

2020 ◽  
Vol 22 (5) ◽  
pp. 3105-3111 ◽  
Author(s):  
Chao Wu ◽  
Daoyou Guo ◽  
Peigang Li ◽  
Shunli Wang ◽  
Aiping Liu ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Single Crystals ◽  
Electrical Transport ◽  
Organic Cation ◽  
Organic Cations ◽  
Structure And Properties ◽  
Electrical Transport Properties ◽  
Halide Perovskites ◽  
A Site ◽  
Lead Halide

Four types of organic cation-mixed single crystals were successfully synthesized by partially substituting A site cations to investigate the effect of organic cations on structure, optical features, thermal stability, and electrical transport properties.

Regulating the Phase Stability and Bandgap of Quasi-2D Dion–Jacobson Cubic CsSnI3 Perovskite via Intercalating Organic Cations

2022 ◽  
Author(s):  
Qian Sun ◽  
Zhi Fang ◽  
Yapeng Zheng ◽  
Zuobao Yang ◽  
Feng Hu ◽  
...  
Keyword(s):  
Phase Stability ◽  
Lead Free ◽  
Organic Cations ◽  
Promising Alternative ◽  
Halide Perovskites ◽  
Lead Halide

Currently, as a promising alternative of lead halide perovskites, the nontoxicity lead-free CsSnI3 perovskites have drawn increasing attention. However, the development of tin-based perovskites is still greatly hindered by their...

scholarly journals Direct detection of circular polarized light in helical 1D perovskite-based photodiode

2020 ◽  
Vol 6 (46) ◽  
pp. eabd3274
Author(s):  
A. Ishii ◽  
T. Miyasaka
Keyword(s):  
Direct Detection ◽  
Polarized Light ◽  
Organic Cations ◽  
Circularly Polarized Light ◽  
Circularly Polarized ◽  
One Dimensional ◽  
Left Handed ◽  
Plasmonic Metamaterials ◽  
Halide Perovskites ◽  
Lead Halide

Detection of circularly polarized light (CPL) has a high potential for development of various optical technologies. Conventional photodetectors require optical polarizers on the device to detect polarized light, and this causes substantial losses of sensitivity and resolution in light detection. Here, we report direct CPL detection by a photodiode using a helical one-dimensional (1D) structure of lead halide perovskites composed of naphthylethylamine-based chiral organic cations. The 1D structure with face-sharing (PbI6)4− octahedral chains whose helicity is largely affected by chiral cations shows intense circular dichroism (CD) signals over 3000 mdeg at 395 nm with the highly anisotropy factor (gCD) of 0.04. This high CD enables photocurrent detection with effective discrimination between left-handed and right-handed CPLs. The CPL detector based on this 1D perovskite achieved the highest polarization discrimination ratio of 25.4, which largely surpasses the direct detecting CPL devices (<4) using chiral plasmonic metamaterials and organic materials.

scholarly journals Unified theory for light-induced halide segregation in mixed halide perovskites

2020 ◽  
Author(s):  
Zehua Chen ◽  
Geert Brocks ◽  
Shuxia Tao ◽  
Peter Bobbert
Keyword(s):  
Band Gap ◽  
Parent Phase ◽  
Thermodynamic Theory ◽  
Partial Replacement ◽  
Organic Cations ◽  
Temperature Phase ◽  
Unified Theory ◽  
Rich Phase ◽  
Energy Lowering ◽  
Halide Perovskites

Abstract Mixed halide perovskites that are thermodynamically stable in the dark demix under illumination. This is problematic for their application in solar cells. We present a unified thermodynamic theory for this light-induced halide segregation that is based on a free energy lowering of photocarriers funnelling to a nucleated phase with different halide composition and lower band gap than the parent phase. We apply the theory to a sequence of mixed iodine-bromine perovskites. The spinodals separating metastable and unstable regions in the composition-temperature phase diagrams only slightly change under illumination, while light-induced binodals separating stable and metastable regions appear signalling the nucleation of a low-band gap iodine-rich phase. We find that the threshold photocarrier density for halide segregation is governed by the band gap difference of the parent and iodine-rich phase. Partial replacement of organic cations by cesium reduces this difference and therefore has a stabilizing effect.

scholarly journals Bis[3,3′-(piperazine-1,4-diyl)dipropanaminium] di-μ2-sulfido-bis[disulfidogermanate(IV)]

2012 ◽  
Vol 68 (8) ◽  
pp. m1046-m1046 ◽  
Author(s):  
Nian-Nian Wang ◽  
Chao Xu ◽  
Taike Duan ◽  
Qun Chen ◽  
Qian-Feng Zhang
Keyword(s):  
Hydrogen Bonds ◽  
Title Compound ◽  
Three Dimensional ◽  
Inorganic Anions ◽  
Organic Cations ◽  
Bond Lengths ◽  
Compound C ◽  
Dimensional Network

In the title compound, (C10H26N4)2[Ge2S6], the dimeric [Ge2S6]4−anion formed by two edge-sharing GeS4tetrahedral units lies around an inversion centre. The average terminal and bridging Ge—S bond lengths are 2.162 (7) and 2.267 (15) Å, respectively. The inorganic anions and organic cations are organized into a three-dimensional network by numerous N—H...S hydrogen bonds.

scholarly journals The effect of the magnitude and direction of the dipoles of organic cations on the electronic structure of hybrid halide perovskites

2019 ◽  
Vol 21 (30) ◽  
pp. 16564-16572
Author(s):  
Sudeep Maheshwari ◽  
Sameer Patwardhan ◽  
George C. Schatz ◽  
Nicolas Renaud ◽  
Ferdinand C. Grozema
Keyword(s):  
Electronic Structure ◽  
Organic Cations ◽  
Halide Perovskites

This work unravels the effect of orientation of the dipoles of organic cations on the electronic structure of hybrid halide perovskites.

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