Addressing the Stability of Lead Halide Perovskites

The realization of stable inorganic perovskites is crucial to enable low-cost solution-processed photovoltaics. However, the main candidate material, CsPbI3, suffers from a spontaneous phase transition at room temperature towards a photo-inactive orthorhombic δ-phase (yellow phase). Here we used theoretical and experimental methods to study the structural and electronic features that determine the stability of the CsPbI3 perovskite. We argued that the two physical characteristics that favor the black perovskite phase at low temperatures are the strong spatial confinement in nanocrystalline structures and the level of electron doping in the material. Within this context, we discussed practical procedures for the realization of long-lasting inorganic lead halide perovskites.

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Compositional Engineering To Improve the Stability of Lead Halide Perovskites: A Comparative Study of Cationic and Anionic Dopants

ACS Applied Energy Materials ◽

10.1021/acsaem.7b00065 ◽

2017 ◽

Vol 1 (1) ◽

pp. 181-190 ◽

Cited By ~ 13

Author(s):

Kianoosh Poorkazem ◽

Timothy L. Kelly

Keyword(s):

Comparative Study ◽

Halide Perovskites ◽

The Stability ◽

Lead Halide

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Recent Research Trends for Improving the Stability of Organo/Inorgano Halide Perovskites

Korean Journal of Metals and Materials ◽

10.3365/kjmm.2022.60.1.1 ◽

2022 ◽

Vol 60 (1) ◽

pp. 1-13

Author(s):

Myeong Jin Seol ◽

Jeong Woo Han ◽

Seung Hwan Hwang ◽

Soo Young Kim

Keyword(s):

Ligand Exchange ◽

Research Trends ◽

Core Shell ◽

Optical And Electrical Properties ◽

Light Emitting ◽

Practical Applications ◽

Halide Perovskites ◽

Core Shell Structure ◽

The Stability ◽

Lead Halide

Because of their superior optical, and electrical properties, lead halide perovskites have emerged as potential materials for light-emitting-diodes. However, some obstacles have yet to be overcome for practical applications including low exciton binding energy, the difficulty of fabricating uniform perovskite films,, and their instability to heat, light, and moisture. In this review, we focus on strategies to improve the lifetime, and stability of perovskites such as core-shell structure, ligand exchange, and doping.

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Intrinsic stability enhancement and ionic migration reduction by fluorinated cations incorporated in hybrid lead halide perovskites

Journal of Materials Chemistry C ◽

10.1039/c8tc06308g ◽

2019 ◽

Vol 7 (18) ◽

pp. 5299-5306 ◽

Cited By ~ 3

Author(s):

Fedwa El-Mellouhi ◽

Sergey N. Rashkeev ◽

Asma Marzouk ◽

Lara Kabalan ◽

Abdelhak Belaidi ◽

...

Keyword(s):

Migration Rate ◽

Large Scale ◽

Perovskite Solar Cell ◽

Main Step ◽

Applied Bias ◽

Hybrid Perovskite ◽

Halide Perovskites ◽

The Stability ◽

Stability Enhancement ◽

Lead Halide

Improving the stability of the hybrid perovskite solar cell is believed to be the main step toward large scale commercialization of this technology. Low controlled concentrations of fluorinated methylammonium cations added to the absorber could prevent its degradation due to water and ionic migration under applied bias due to of the reduction in the migration rate.

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