scholarly journals Recent Advancements in Crystalline Pb-Free Halide Double Perovskites

Crystals ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 62 ◽  
Author(s):  
Muhammad Usman ◽  
Qingfeng Yan
Keyword(s):  
Large Scale ◽  
Optoelectronic Properties ◽  
Double Perovskites ◽  
Ambient Conditions ◽  
Photoelectric Properties ◽  
Potential Alternative ◽  
High Carrier Mobility ◽  
Halide Perovskites ◽  
Synthesis Composition ◽  
Lead Halide

Lead halide perovskites have gained more and more attention because of their ease of synthesis and excellent photoelectric properties including a large absorption coefficient, long carrier lifetime, long carrier diffusion length, and high carrier mobility. However, their toxicity, instability, and phase degradation in ambient environments impede their large-scale applications. To address these concerns, it is desirable to find stable alternative halide perovskites without toxicity and with comparable optoelectronic properties to lead-based perovskites. Over the years, a considerable number of lead-free halide perovskites have been added to this family of materials, including A2B’B’’X6, A2BX6, and A3B2X9 type perovskites. Among these, double perovskites with the general formula A2B’B’’X6 are deemed to be a potential alternative to lead halide perovskites as they possess good stability under ambient conditions and excellent optoelectronic properties. In this review, recent progress in exploring Pb-free halide double perovskites is highlighted. The synthesis, composition-tuning, physical properties, and applications of representative 3D, 2D, and nanocrystal A2B’B’’X6 double perovskites are introduced. In addition, perspectives about current challenges and solutions in this field are also provided.

scholarly journals Lead-Free Halide Double Perovskites: A Review of the Structural, Optical, and Stability Properties as Well as Their Viability to Replace Lead Halide Perovskites

Metals ◽  
2018 ◽  
Vol 8 (9) ◽  
pp. 667 ◽  
Author(s):  
Edson Meyer ◽  
Dorcas Mutukwa ◽  
Nyengerai Zingwe ◽  
Raymond Taziwa
Keyword(s):  
Solar Cells ◽  
Perovskite Solar Cells ◽  
Lead Free ◽  
Double Perovskites ◽  
Stability Properties ◽  
Perovskite Materials ◽  
Halide Perovskites ◽  
Halide Perovskite ◽  
Light Absorbers ◽  
Lead Halide

Perovskite solar cells employ lead halide perovskite materials as light absorbers. These perovskite materials have shown exceptional optoelectronic properties, making perovskite solar cells a fast-growing solar technology. Perovskite solar cells have achieved a record efficiency of over 20%, which has superseded the efficiency of Gräztel dye-sensitized solar cell (DSSC) technology. Even with their exceptional optical and electric properties, lead halide perovskites suffer from poor stability. They degrade when exposed to moisture, heat, and UV radiation, which has hindered their commercialization. Moreover, halide perovskite materials consist of lead, which is toxic. Thus, exposure to these materials leads to detrimental effects on human health. Halide double perovskites with A2B′B″X6 (A = Cs, MA; B′ = Bi, Sb; B″ = Cu, Ag, and X = Cl, Br, I) have been investigated as potential replacements of lead halide perovskites. This work focuses on providing a detailed review of the structural, optical, and stability properties of these proposed perovskites as well as their viability to replace lead halide perovskites. The triumphs and challenges of the proposed lead-free A2B′B″X6 double perovskites are discussed here in detail.

Using photoluminescence to monitor the optoelectronic properties of methylammonium lead halide perovskites in light and dark over periods of days

2018 ◽  
Vol 194 ◽  
pp. 353-358 ◽  
Author(s):  
Vipul Kheraj ◽  
Brian J. Simonds ◽  
Aditi Toshniwal ◽  
Sudhajit Misra ◽  
Peter Peroncik ◽  
...  
Keyword(s):  
Optoelectronic Properties ◽  
Halide Perovskites ◽  
Lead Halide

Dual-source vapor-processed blue-emissive cesium copper iodine microplatelets with high crystallinity and stability

2021 ◽  
Author(s):  
Jingjing Yan ◽  
Jingli Ma ◽  
Mengyao Zhang ◽  
Ruoting Yang ◽  
Xu Chen ◽  
...  
Keyword(s):  
Low Temperature ◽  
Carrier Mobility ◽  
Processing Technique ◽  
Tunable Bandgap ◽  
Low Temperature Processing ◽  
Dual Source ◽  
High Carrier Mobility ◽  
High Carrier ◽  
Halide Perovskites ◽  
Lead Halide

Recently, hybrid lead-halide perovskites have attracted extensive attention because of their unique optoelectronic characteristics, such as ambipolar charge transport, tunable bandgap, high carrier mobility, low-temperature processing technique, and so on....

scholarly journals Role of Lead Vacancies for Optoelectronic Properties of Lead-Halide Perovskites

2017 ◽  
Vol 122 (10) ◽  
pp. 5216-5226 ◽  
Author(s):  
Dayton J. Vogel ◽  
Talgat M. Inerbaev ◽  
Dmitri S. Kilin
Keyword(s):  
Optoelectronic Properties ◽  
Halide Perovskites ◽  
Lead Halide

scholarly journals Efficient Emission in Halide Layered Double Perovskites: The Role of Sb3+ Substitution in Cs4Cd1–xMnxBi2Cl12 Phosphors

2020 ◽  
Author(s):  
Brenda Vargas ◽  
Eduardo Coutiño-Gonzalez ◽  
Oscar Ovalle-Encinia ◽  
Citlali Sánchez-Aké ◽  
Diego Solis-Ibarra
Keyword(s):  
Optoelectronic Properties ◽  
Double Perovskites ◽  
Spin Orbit Coupling ◽  
Fixed Amount ◽  
Electronic Delocalization ◽  
The Subject ◽  
Halide Perovskites ◽  
Pl Emission ◽  
Intense Research

Layered halide perovskites and double perovskites optoelectronic properties have recently been the subject of intense research. Layered double perovskites represent the merging of both worlds, and as such, have the potential to further expand the already vast space of optoelectronic properties and applications of halide perovskites. Despite having more than 40 known members, to date, only the <111>-oriented layered double perovskites: Cs<sub>4</sub>Cd<sub>1</sub>–<sub>x</sub>Mn<sub>x</sub><b>Bi</b><sub>2</sub>Cl<sub>12</sub>, have shown efficient photoluminescence (PL). In this work, we replaced Bi with Sb to further investigate the electronic structure and PL properties of these materials, resulting in two new families of layered inorganic perovskites alloys with full solubility. The first family, Cs<sub>4</sub>Cd<sub>1</sub>–<sub>x</sub>Mn<b>Sb</b><sub>2</sub>Cl<sub>12</sub>, exhibits a PL emission at 605 nm ascribed to Mn<sup>2+</sup> centers in octahedral coordination, and a maximum photoluminescence quantum yield PLQY of 28.5%. The second family of alloys, also with full solubility, Cs<sub>4</sub>Cd<sub>0.8</sub>Mn<sub>0.2</sub>(Sb<sub>1</sub>–<sub>y</sub>Bi<sub>y</sub>)<sub>2</sub>Cl<sub>12</sub>, contains a fixed amount of Mn<sup>2+</sup> and Cd<sup>2+</sup> cations but different concentrations of the trivalent metals. This variability allows the tuning of the PL emission from 603 nm to 614 nm. We show that the decreased efficiency of the Cs<sub>4</sub>Cd<sub>1</sub>–<sub>x</sub>Mn<sub>x</sub>Sb<sub>2</sub>Cl<sub>12</sub>family compared to Cs<sub>4</sub>Cd<sub>1</sub>–<sub>x</sub>Mn<sub>x</sub><b>Bi</b><sub>2</sub>Cl<sub>12</sub>, is mostly due to a decreased spin-orbit coupling in Sb and the subsequent increased electronic delocalization compared to the Bi alloys, reducing the energy transfer to Mn<sup>2+</sup> centers. This work lays out a roadmap to understand and achieve high photoluminescence efficiencies in layered double perovskites.<p></p>

Synergistic enhancement of Cs and Br doping in formamidinium lead halide perovskites for high performance optoelectronics

CrystEngComm ◽  
2018 ◽  
Vol 20 (37) ◽  
pp. 5510-5518 ◽  
Author(s):  
Qingxian Li ◽  
Yucheng Liu ◽  
Yunxia Zhang ◽  
Mingxin Hu ◽  
Zhou Yang ◽  
...  
Keyword(s):  
Phase Stability ◽  
High Performance ◽  
Optoelectronic Properties ◽  
Synergistic Enhancement ◽  
Halide Perovskites ◽  
Lead Halide

Cs and Br doped FAPbI3 shows better phase stability as well as optoelectronic properties, furnishing it with good optoelectronic performance.

scholarly journals Progressive Polytypism and Bandgap Tuning in Azetidinium Lead Halide Perovskites

2021 ◽  
Author(s):  
Jiyu Tian ◽  
David Cordes ◽  
Alexandra Slawin ◽  
Eli Zysman-Colman ◽  
Finlay Morrison
Keyword(s):  
Linear Variation ◽  
Ambient Conditions ◽  
X Ray Diffraction ◽  
X Ray ◽  
Vegard’S Law ◽  
The Family ◽  
Halide Perovskites ◽  
Diffraction Patterns ◽  
Bandgap Tuning ◽  
Lead Halide

<div><div><div><p>Mixed halide azetidinium lead perovskites AzPbBr<sub>3-<i>x</i></sub>X<i><sub>x</sub></i> (X = Cl or I) were obtained by mechanosynthesis. With varying halide composition from Cl- to Br- to I-; the chloride and bromide analogs both form in the hexagonal 6H polytype while the iodide adopts the 9R polytype. An intermediate 4H polytype is observed for mixed Br/I compositions. Overall the structure progresses from 6H to 4H to 9R perovskite polytype with varying halide composition. Rietveld refinement of the powder X-ray diffraction patterns revealed a linear variation in unit cell volume as a function of the average radius of the anion, which is not only observed within the solid solution of each polytype (according to Vegard’s law) but extends uniformly across all three polytypes. This is correlated with a progressive (linear) tuning of the bandgap from 3.41 to 2.00 eV. Regardless of halide, the family of azetidinium halide perovskite polytypes are highly stable, with no discernible change in properties over more than 6 months under ambient conditions</p></div></div></div>

A high performance perovskite CH3NH3PbCl3 single crystal photodetector: benefiting from an evolutionary preparation process

2019 ◽  
Vol 7 (18) ◽  
pp. 5442-5450 ◽  
Author(s):  
Zhishuai Yuan ◽  
Wei Huang ◽  
Shoutao Ma ◽  
Gang Ouyang ◽  
Wei Hu ◽  
...  
Keyword(s):  
Single Crystal ◽  
High Performance ◽  
Optoelectronic Properties ◽  
Preparation Process ◽  
Semiconducting Materials ◽  
Inorganic Lead ◽  
Halide Perovskites ◽  
Lead Halide

Hybrid organic–inorganic lead halide perovskites (CH3NH3PbX3, X = Cl, Br, or I) are deemed to be the highest potential semiconducting materials due to their unique optoelectronic properties.

scholarly journals Efficient Emission in Halide Layered Double Perovskites: The Role of Sb3+ Substitution in Cs4Cd1–xMnxBi2Cl12 Phosphors

2020 ◽  
Author(s):  
Brenda Vargas ◽  
Eduardo Coutiño-Gonzalez ◽  
Oscar Ovalle-Encinia ◽  
Citlali Sánchez-Aké ◽  
Diego Solis-Ibarra
Keyword(s):  
Optoelectronic Properties ◽  
Double Perovskites ◽  
Spin Orbit Coupling ◽  
Fixed Amount ◽  
Electronic Delocalization ◽  
The Subject ◽  
Halide Perovskites ◽  
Pl Emission ◽  
Intense Research

Layered halide perovskites and double perovskites optoelectronic properties have recently been the subject of intense research. Layered double perovskites represent the merging of both worlds, and as such, have the potential to further expand the already vast space of optoelectronic properties and applications of halide perovskites. Despite having more than 40 known members, to date, only the <111>-oriented layered double perovskites: Cs<sub>4</sub>Cd<sub>1</sub>–<sub>x</sub>Mn<sub>x</sub><b>Bi</b><sub>2</sub>Cl<sub>12</sub>, have shown efficient photoluminescence (PL). In this work, we replaced Bi with Sb to further investigate the electronic structure and PL properties of these materials, resulting in two new families of layered inorganic perovskites alloys with full solubility. The first family, Cs<sub>4</sub>Cd<sub>1</sub>–<sub>x</sub>Mn<b>Sb</b><sub>2</sub>Cl<sub>12</sub>, exhibits a PL emission at 605 nm ascribed to Mn<sup>2+</sup> centers in octahedral coordination, and a maximum photoluminescence quantum yield PLQY of 28.5%. The second family of alloys, also with full solubility, Cs<sub>4</sub>Cd<sub>0.8</sub>Mn<sub>0.2</sub>(Sb<sub>1</sub>–<sub>y</sub>Bi<sub>y</sub>)<sub>2</sub>Cl<sub>12</sub>, contains a fixed amount of Mn<sup>2+</sup> and Cd<sup>2+</sup> cations but different concentrations of the trivalent metals. This variability allows the tuning of the PL emission from 603 nm to 614 nm. We show that the decreased efficiency of the Cs<sub>4</sub>Cd<sub>1</sub>–<sub>x</sub>Mn<sub>x</sub>Sb<sub>2</sub>Cl<sub>12</sub>family compared to Cs<sub>4</sub>Cd<sub>1</sub>–<sub>x</sub>Mn<sub>x</sub><b>Bi</b><sub>2</sub>Cl<sub>12</sub>, is mostly due to a decreased spin-orbit coupling in Sb and the subsequent increased electronic delocalization compared to the Bi alloys, reducing the energy transfer to Mn<sup>2+</sup> centers. This work lays out a roadmap to understand and achieve high photoluminescence efficiencies in layered double perovskites.<p></p>

scholarly journals Enhanced terahertz emission from imprinted halide perovskite nanostructures

Nanophotonics ◽  
2019 ◽  
Vol 9 (1) ◽  
pp. 187-194 ◽  
Author(s):  
Viacheslav I. Korolev ◽  
Anatoly P. Pushkarev ◽  
Petr A. Obraztsov ◽  
Anton N. Tsypkin ◽  
Anvar A. Zakhidov ◽  
...  
Keyword(s):  
Nanoimprint Lithography ◽  
Large Scale ◽  
Near Field ◽  
Laser Pulses ◽  
Femtosecond Laser Irradiation ◽  
Incident Laser ◽  
Thz Generation ◽  
Mechanical Deformations ◽  
Halide Perovskites ◽  
Lead Halide

AbstractLead halide perovskites were known to be a prospective family of materials for terahertz (THz) generation. On the other hand, perovskite nanostructures, nanoantennas, and metasurfaces allow tailoring perovskites optical characteristics, resulting in more efficient interaction with incident or emitted light. Moreover, the perovskites are robust materials against formation of defects caused by mechanical deformations and can be efficiently nanostructured by various high throughput methods. In this work, we have enhanced THz emission from MAPbI3 perovskite upon femtosecond laser irradiation using nanoimprint lithography. The formed nanostructures not only improve absorption of the incident laser pulses, but also lead to a non-symmetric near-field distribution. As a result, we have enhanced the efficiency of THz emission from the nanostructured perovskite by 3.5 times as compared with a smooth perovskite film. Our results paved the way for a new application of large-scale perovskite nanostructuring, making halide perovskites competitive with more expensive conventional semiconductors for THz generation.

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