scholarly journals Magnetizing lead-free halide double perovskites

2020 ◽  
Vol 6 (45) ◽  
pp. eabb5381
Author(s):  
Weihua Ning ◽  
Jinke Bao ◽  
Yuttapoom Puttisong ◽  
Fabrizo Moro ◽  
Libor Kobera ◽  
...  
Keyword(s):  
High Speed ◽  
Double Perovskite ◽  
Lead Free ◽  
Great Success ◽  
Double Perovskites ◽  
Temperature Dependent ◽  
Magnetic Elements ◽  
Halide Perovskites ◽  
New Generation ◽  
Further Development

Spintronics holds great potential for next-generation high-speed and low–power consumption information technology. Recently, lead halide perovskites (LHPs), which have gained great success in optoelectronics, also show interesting magnetic properties. However, the spin-related properties in LHPs originate from the spin-orbit coupling of Pb, limiting further development of these materials in spintronics. Here, we demonstrate a new generation of halide perovskites, by alloying magnetic elements into optoelectronic double perovskites, which provide rich chemical and structural diversities to host different magnetic elements. In our iron-alloyed double perovskite, Cs2Ag(Bi:Fe)Br6, Fe3+ replaces Bi3+ and forms FeBr6 clusters that homogenously distribute throughout the double perovskite crystals. We observe a strong temperature-dependent magnetic response at temperatures below 30 K, which is tentatively attributed to a weak ferromagnetic or antiferromagnetic response from localized regions. We anticipate that this work will stimulate future efforts in exploring this simple yet efficient approach to develop new spintronic materials based on lead-free double perovskites.

Pressure-Induced Bandgap Engineering of Lead-Free Halide Double Perovskite (NH4)2SnBr6

2021 ◽  
Author(s):  
Jiaxiang Wang ◽  
Lingrui Wang ◽  
Fei Wang ◽  
Sheng Jiang ◽  
Haizhong Guo
Keyword(s):  
Double Perovskite ◽  
Vital Role ◽  
Lead Free ◽  
Double Perovskites ◽  
Bandgap Engineering ◽  
Environmental Friendly ◽  
Halide Perovskites ◽  
Optoelectronic Applications

Lead-free halide double perovskites (HDPs) have recently been proposed as potential stable and environmental-friendly alternatives to lead-based halide perovskites. Bandgap engineering plays a vital role in optoelectronic applications of HDP...

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.

Thickness-induced band-gap engineering in lead-free double perovskite Cs2AgBiBr6for highly efficient photocatalysis

2021 ◽  
Author(s):  
Bing-Hao Wang ◽  
Bin Gao ◽  
Jin-Rong Zhang ◽  
Lang Chen ◽  
Guo Jun-Kang ◽  
...  
Keyword(s):  
Solar Cells ◽  
Band Gap ◽  
Double Perovskite ◽  
Lead Free ◽  
Double Perovskites ◽  
Two Dimensional ◽  
Band Gap Engineering ◽  
Highly Efficient ◽  
Photovoltaic Solar Cells

In recent years, two-dimensional (2D) lead-free double perovskites have been attracting much attention because of their unique performance for photovoltaic solar cells andphotocatalysis. Nonetheless, how the thickness affects the photoelectric...

Physical and optoelectronic features of lead-free A2AgRhBr6 (A = Cs, Rb, K, Na, Li) with halide double perovskite composition

2020 ◽  
Vol 8 (37) ◽  
pp. 12968-12983
Author(s):  
Pradeep R. Varadwaj ◽  
Helder M. Marques
Keyword(s):  
Double Perovskite ◽  
Lead Free ◽  
Theoretical Development ◽  
Double Perovskites

Composition engineering of the A, B′, and B′′-sites in AB′B′′X6 has led to the theoretical development of rhodium based halide double perovskites in 3D, A2AgRhBr6 (A = Cs, Rb, K, Na, Li), with impressive optoelectronic characteristics.

Air-stable Artificial Synapse Based on Lead-free Double Perovskite Cs2AgBiBr6 Film for Neuromorphic Computing

2021 ◽  
Author(s):  
Jie Lao ◽  
Wen Xu ◽  
Chunli Jiang ◽  
Ni Zhong ◽  
Bobo Tian ◽  
...  
Keyword(s):  
Nonvolatile Memory ◽  
Double Perovskite ◽  
Lead Free ◽  
Neuromorphic Computing ◽  
Artificial Synapse ◽  
Halide Perovskites

Halide perovskites (HPs) are promising materials for preparing nonvolatile memory and artificial synapse devices. However, the instability and toxicity of lead HPs seriously restrict their further application. Herein, a lead-free...

Highly efficient and stable broadband near-infrared-emitting lead-free metal halide double perovskites

2021 ◽  
Author(s):  
Guangting Xiong ◽  
Lifang Yuan ◽  
Yahong Jin ◽  
Haoyi Wu ◽  
Bingyan Qu ◽  
...  
Keyword(s):  
Near Infrared ◽  
Metal Halide ◽  
Lead Free ◽  
Double Perovskites ◽  
Highly Efficient ◽  
Lead Metal ◽  
Halide Perovskites ◽  
Free Metal

Non-lead metal halide double perovskites (MHDP), recognized as one of the most promising alternatives to the lead-based metal halide perovskites (MHP), have received enormous attention in recent years due to...

All-inorganic tin-doped Cs2BiAgCl6 double perovskite with stable blue photoluminescence for WLEDs

2021 ◽  
Author(s):  
Dayu Huang ◽  
Hui Xiao ◽  
Dongjie Liu ◽  
Qiuyun Ouyang ◽  
Youchao Kong ◽  
...  
Keyword(s):  
Band Gap ◽  
Double Perovskite ◽  
Lead Free ◽  
Double Perovskites ◽  
Variable Band Gap ◽  
Blue Photoluminescence

Lead free double perovskites have recently received increasing attention due to variable band gap. Herein, tin has been doped into Cs2BiAgCl6 successfully. The doping of Sn2+ cations can make the...

Advances in lead-free double perovskite nanocrystals, engineering band-gaps and enhancing stability through composition tunability

Nanoscale ◽  
2019 ◽  
Vol 11 (18) ◽  
pp. 8665-8679 ◽  
Author(s):  
Sasha Khalfin ◽  
Yehonadav Bekenstein
Keyword(s):  
Electronic Structure ◽  
Double Perovskite ◽  
Band Gaps ◽  
Model Systems ◽  
Lead Free ◽  
Double Perovskites ◽  
Perovskite Nanocrystals ◽  
Topical Review ◽  
Cationic Exchange ◽  
Made In

In this topical review, we have focused on the recent advances made in the studies of lead-free perovskites in the bulk form and as nanocrystals. We highlight how nanocrystals can serve as model systems to explore the schemes of cationic exchange, doping and alloying for engineering the electronic structure of double perovskites.

scholarly journals A Review on Cs-Based Pb-Free Double Halide Perovskites: From Theoretical and Experimental Studies to Doping and Applications

Molecules ◽  
2021 ◽  
Vol 26 (7) ◽  
pp. 2010
Author(s):  
Fatemeh Heidari Gourji ◽  
Dhayalan Velauthapillai
Keyword(s):  
Experimental Research ◽  
Experimental Studies ◽  
Double Perovskite ◽  
Research Community ◽  
Double Perovskites ◽  
Research Groups ◽  
Perovskite Materials ◽  
Structural Formulas ◽  
Perovskite Material ◽  
Halide Perovskites

Despite the progressive enhancement in the flexibility of Pb-based perovskites for optoelectronic applications, regrettably, they are facing two main challenges; (1) instability, which originates from using organic components in the perovskite structure, and (2) toxicity due to Pb. Therefore, new, stable non-toxic perovskite materials are demanded to overcome these drawbacks. The research community has been working on a wide variety of Pb-free perovskites with different molecular formulas and dimensionality. A variety of Pb-free halide double perovskites have been widely explored by different research groups in search for stable, non-toxic double perovskite material. Especially, Cs-based Pb-free halide double perovskite has been in focus recently. Herein, we present a review of theoretical and experimental research on Cs-based Pb-free double halide perovskites of structural formulas Cs2M+M3+X6 (M+ = Ag+, Na+, In+ etc.; M3+= Bi3+, In3+, Sb3+; X = Cl−, Br−, I¯) and Cs2M4+X6 (M4+ = Ti4+, Sn4+, Au4+ etc.). We also present the challenges faced by these perovskite compounds and their current applications especially in photovoltaics alongside the effect of metal dopants on their performance.

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