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

Journal of Materials Chemistry A ◽

10.1039/d1ta10246j ◽

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...

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Morphological and Optical Tuning of Lead-Free Cs2SnX6 (X = I, Br) Perovskite Nanocrystals by Ligand Engineering

Frontiers in Electronics ◽

10.3389/felec.2021.703182 ◽

2021 ◽

Vol 2 ◽

Author(s):

Alessandro Veronese ◽

Carlo Ciarrocchi ◽

Marcello Marelli ◽

Paolo Quadrelli ◽

Maddalena Patrini ◽

...

Keyword(s):

Three Dimensional ◽

Blue Shift ◽

Carbon Chain ◽

Lead Free ◽

Future Research ◽

Promising Alternative ◽

Perovskite Nanocrystals ◽

Halide Perovskites ◽

Capping Ligands ◽

Lead Halide

In order to overcome the toxicity of lead halide perovskites, in recent years the research has focused on replacing lead with more environmentally friendly metals like tin, germanium, bismuth or antimony. However, lead-free perovskites still present instability issues and low performances that do not make them competitive when compared to their lead-based counterparts. Here we report the synthesis of lead-free Cs2SnX6 (X = Br, I) nanostructures of different shapes by using various surface ligands. These compounds are a promising alternative to lead halide perovskites in which the replacement of divalent lead (Pb(II)) with tetravalent tin (Sn(IV)) causes a modification of the standard perovskite structure. We investigate the effects of different amines on the morphology and size of Cs2SnX6 (X = Br, I) nanocrystals, presenting a facile hot-infection method to directly synthesize three-dimensional (3D) nanoparticles as well as two-dimensional (2D) nanoplatelets. The amines not only modify the shape of the crystals, but also affect their optical properties: increasing the length of the amine carbon chain we observe a widening in the bandgap of the compounds and a blue-shift of their emission peak. Alongside the tuning of the chemical composition and the reduction of the crystal size, our study offers a new insight in controlling the physical properties of perovskite nanocrystals by means of the capping ligands, paving the way for future research on lead-free materials.

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

Materials Today Energy ◽

10.1016/j.mtener.2021.100759 ◽

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

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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 ◽

10.3390/met8090667 ◽

2018 ◽

Vol 8 (9) ◽

pp. 667 ◽

Cited By ~ 24

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.

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

Physical Chemistry Chemical Physics ◽

10.1039/c9cp06182g ◽

2020 ◽

Vol 22 (5) ◽

pp. 3105-3111 ◽

Cited By ~ 2

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.

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From Lead Halide Perovskites to Lead‐Free Metal Halide Perovskites and Perovskite Derivatives

Advanced Materials ◽

10.1002/adma.201803792 ◽

2019 ◽

Vol 31 (47) ◽

pp. 1803792 ◽

Cited By ~ 125

Author(s):

Zewen Xiao ◽

Zhaoning Song ◽

Yanfa Yan

Keyword(s):

Metal Halide ◽

Lead Free ◽

Halide Perovskites ◽

Free Metal ◽

Lead Halide

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Can perovskite inspired bismuth halide nanocrystals outperform their lead counterparts?

Journal of Materials Chemistry A ◽

10.1039/d0ta03490h ◽

2020 ◽

Vol 8 (26) ◽

pp. 12951-12963

Author(s):

Sathy Harshavardhan Reddy ◽

Ranadeep Raj Sumukam ◽

Banavoth Murali

Keyword(s):

Lead Free ◽

Promising Alternative ◽

Perovskite Nanocrystals ◽

Halide Perovskites

In the quest for finding non-toxic and stable lead-free perovskite nanocrystals (NCs), bismuth halide perovskites (BHP) have emerged as a promising alternative. This perspective presents an overview, challenges, and future opportunities in BHP NCs.

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

CrystEngComm ◽

10.1039/c8ce00916c ◽

2018 ◽

Vol 20 (37) ◽

pp. 5510-5518 ◽

Cited By ~ 2

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.

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Lead-free halide perovskites: review of structure-property relationship, and applications in light emitting devices and radiation detectors

Journal of Materials Chemistry A ◽

10.1039/d1ta01737c ◽

2021 ◽

Author(s):

Yuting Gao ◽

Yufeng Pan ◽

Feng Zhou ◽

Guangda Niu ◽

Chunjie Yan

Keyword(s):

Radiation Detectors ◽

Lead Free ◽

Structure Property ◽

Excellent Performance ◽

Widespread Application ◽

Light Emitting ◽

Light Emitting Devices ◽

Structure Property Relationship ◽

Halide Perovskites ◽

Lead Halide

Lead halide perovskites have demonstrated excellent performance for light emitting diodes and detectors. However, the toxicity of lead (Pb) in the devices severely impedes their widespread application and commercialization. The...

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