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 Probing the Stability and Band Gaps of Cs2AgInCl6 and Cs2AgSbCl6 Lead-Free Double Perovskite Nanocrystals

2019 ◽  
Vol 31 (9) ◽  
pp. 3134-3143 ◽  
Author(s):  
Jakob C. Dahl ◽  
Wojciech T. Osowiecki ◽  
Yao Cai ◽  
Joseph K. Swabeck ◽  
Yehonadav Bekenstein ◽  
...  
Keyword(s):  
Double Perovskite ◽  
Band Gaps ◽  
Lead Free ◽  
Perovskite Nanocrystals ◽  
The Stability

Lead-Free Direct Band Gap Double-Perovskite Nanocrystals with Bright Dual-Color Emission

2018 ◽  
Vol 140 (49) ◽  
pp. 17001-17006 ◽  
Author(s):  
Bin Yang ◽  
Xin Mao ◽  
Feng Hong ◽  
Weiwei Meng ◽  
Yuxuan Tang ◽  
...  
Keyword(s):  
Band Gap ◽  
Double Perovskite ◽  
Lead Free ◽  
Perovskite Nanocrystals ◽  
Direct Band Gap ◽  
Dual Color ◽  
Direct Band ◽  
Color Emission

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.

scholarly journals Moisture-assisted Near-UV Emission Enhancement of Lead-free Cs4CuIn2Cl12 Double Perovskite Nanocrystals

2021 ◽  
Author(s):  
Maning Liu ◽  
Sri Kasi Matta ◽  
Anastasia Matuhina ◽  
G. Krishnamurthy Grandhi ◽  
Harri Ali-Löytty ◽  
...  
Keyword(s):  
Double Perovskite ◽  
Lead Free ◽  
Colloidal Synthesis ◽  
Morphological Transformation ◽  
Perovskite Nanocrystals ◽  
Uv Emission ◽  
Radiative Transitions ◽  
Emission Enhancement ◽  
Wide Range ◽  
Halide Perovskite

Lead-based halide perovskite nanocrystals (NCs) are recognized as emerging emissive materials with superior photoluminescence (PL) properties. However, the toxicity of lead and the swift chemical decomposition under atmospheric moisture severely hinder their commercialization process. Herein, we report the first colloidal synthesis of lead-free Cs4CuIn2Cl12 layered double perovskite NCs via a facile moisture-assisted hot-injection method stemming from relatively nontoxic precursors. While moisture is typically detrimental to NC synthesis, we demonstrate that the presence of water molecules in Cs4CuIn2Cl12 synthesis enhances the PL quantum yield (mainly in the near-UV range), induces a morphological transformation from 3D nanocubes to 2D nanoplatelets, and converts the dark transitions to radiative transitions for the observed self-trapped excitons relaxation. This work paves the way for further studies on the moisture-assisted synthesis of novel lead-free halide perovskite NCs for a wide range of applications.

Lead-Free Silver-Bismuth Halide Double Perovskite Nanocrystals

2018 ◽  
Vol 130 (19) ◽  
pp. 5457-5461 ◽  
Author(s):  
Bin Yang ◽  
Junsheng Chen ◽  
Songqiu Yang ◽  
Feng Hong ◽  
Lei Sun ◽  
...  
Keyword(s):  
Double Perovskite ◽  
Lead Free ◽  
Perovskite Nanocrystals

Lattice Dynamics and Electron–Phonon Coupling in Lead-Free Cs2AgIn1–xBixCl6 Double Perovskite Nanocrystals

2020 ◽  
Vol 11 (6) ◽  
pp. 2113-2120 ◽  
Author(s):  
Debjit Manna ◽  
Jiban Kangsabanik ◽  
Tapan Kumar Das ◽  
Debashish Das ◽  
Aftab Alam ◽  
...  
Keyword(s):  
Lattice Dynamics ◽  
Double Perovskite ◽  
Lead Free ◽  
Phonon Coupling ◽  
Perovskite Nanocrystals ◽  
Electron Phonon Coupling

Synthesis of lead-free Cs4(Cd1−xMnx)Bi2Cl12 (0 ≤ x ≤ 1) layered double perovskite nanocrystals with controlled Mn–Mn coupling interaction

Nanoscale ◽  
2020 ◽  
Vol 12 (45) ◽  
pp. 23191-23199
Author(s):  
Hanjun Yang ◽  
Wenwu Shi ◽  
Tong Cai ◽  
Katie Hills-Kimball ◽  
Zhenyang Liu ◽  
...  
Keyword(s):  
Double Perovskite ◽  
Lead Free ◽  
Optoelectronic Materials ◽  
Next Generation ◽  
Coupling Interaction ◽  
Perovskite Nanocrystals

Lead-free perovskites and their analogues have been extensively studied as a class of next-generation luminescent and optoelectronic materials.

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