Adverse oxidation of CsPbI<sub>2</sub>Br perovskite during the crystallization process in an N<sub>2</sub> glove-box

Zhang, Shasha; Wu, Shaohang; Babu, B. Hari; Chen, Weitao; Chen, Rui; Huang, Yuan; Yang, Zhichun; Zhu, Hongmei; Zhou, Jing; Chen, Wei

doi:10.1039/c9tc01209e

Cited by 14 publications

(8 citation statements)

References 35 publications

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“…In a very recent report, it has been found that CsPbI 2 Br undergoes adverse oxidation during the annealing process even in N 2 ‐filled glove box and the Pb‐O sites generated during the process function as defects being detrimental for device performance. More of such thorough investigations, which are expected to come in future, can contribute significantly to the understanding of defect formation and passivation . Phase purity, chemical composition uniformity and microdefects must be examined well to find the actual role of dopants and additives in passivating the defects.…”

Section: Inorganic (Organic‐free) Perovskitesmentioning

confidence: 99%

Perovskite Solar Cells: Can We Go Organic‐Free, Lead‐Free, and Dopant‐Free?

Miyasaka

Kulkarni

Kim

et al. 2019

Advanced Energy Materials

228

159

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Having demonstrated incredibly fast progress in power conversion efficiency, rising to a level comparable with that of crystalline silicon cells, lead‐based organic–inorganic hybrid perovskite solar cells are now facing the stability tests needed for industrialization. Poor thermal stability (<150 °C) owing to organic constituents and interlayer diffusion of materials (dopants), and environmental incompatibility due to Pb has surged the development of organic‐free, Pb‐free perovskites and dopant‐free hole transport materials (HTMs). The recent rapid increase in efficiency of cells based on inorganic perovskites, crossing 18%, demonstrates the great potential of inorganic perovskites as thermally stable and high‐efficiency cells. Although all kinds of Pb‐free perovskites lag in efficiency in comparison to the hybrid and inorganic perovskites, they also demonstrate better structural and environmental stability. The performance of dopant‐free HTMs matching/surpassing dopant‐containing HTMs makes the former a better choice for stability. Even though the efforts to enhance the stability of Pb‐based hybrid perovskites should continue by different techniques, organic‐free and lead‐free perovskites, and dopant‐free HTMs must be pursued with greater interest for the future. This review describes the present issues and possible strategies to address them, and thus will help to improve the overall performance of robust organic‐free, Pb‐free, and dopant‐free perovskite solar cells.

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Section: Inorganic (Organic‐free) Perovskitesmentioning

confidence: 99%

Perovskite Solar Cells: Can We Go Organic‐Free, Lead‐Free, and Dopant‐Free?

Miyasaka

Kulkarni

Kim

et al. 2019

Advanced Energy Materials

228

159

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“… Subsequently, the CsPbBr 3 with the accumulation of holes further produces oxidative products. Besides, as for the oxygen degradation mechanism of CsPbI 2 Br, it has been concluded that oxygen atoms are chemically absorbed at the surface and thus interstitial oxygen defects generate The oxygen degradation also appears in HTL due to the oxidation of organic HTM.…”

Section: Degradation In Moisture and Oxygen Environmentmentioning

confidence: 99%

Achieving Resistance against Moisture and Oxygen for Perovskite Solar Cells with High Efficiency and Stability

Chi

Banerjee

2021

Chem. Mater.

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Realization of high efficiency along with long-term stability of perovskites solar cells has been a goal of researchers in this field. Breakthroughs in efficiency have been achieved in the past decade, exceeding those of most thin film solar cells. However, the challenge of degradation and instability of perovskite solar cells is currently the bottleneck for their real-life application. Extensive research has been conducted to achieve simultaneously high efficiency and high stability, leading to considerable progress in device performance. A significant source causing degradation is the ingression of external materials, such as moisture and oxygen. In this review, the mechanisms of moisture and oxygen degradation occurring in perovskite absorber and charge transporting layers are interpreted. Primary approaches to simultaneously achieve high efficiency and high stability focus on encapsulation, interfacial layer engineering, process engineering, ion engineering, and dopant and alternative engineering. In brief, we review the materials development and engineering strategies to improve performance and identify the obstacles that hinder the realization of high stability along with high efficiency.

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“…were also very promising HTL candidates due to their excellent thermal stability, but their fabrication condition need be to be further optimized. [16,[137][138][139][140]…”

Section: Charge Transfer Layermentioning

confidence: 99%

Structural Properties and Stability of Inorganic CsPbI₃ Perovskites

et al. 2020

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All inorganic lead halide perovskites (ILHPs) have recently become one of the research hotspots in the field of photovoltaics. Due to the absence of weakly bonded organic components, ILHPs exhibit excellent thermal stability compared with the hybrid organic–inorganic perovskites. However, the low structural stability against ambient conditions still limits their practical applications. Herein, the phase stability and structural properties of the inorganic CsPbI3 are discussed, followed by a comprehensive review of strategies to improve the performance and stability of CsPbI3 perovskite solar cells (PSCs) with respect to material engineering and device configuration engineering. Finally, the challenges of inorganic PSCs and the promising directions to further improve their efficiency and stability are discussed.

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Adverse oxidation of CsPbI₂Br perovskite during the crystallization process in an N₂ glove-box

Abstract: During annealing, surface oxidation leads to defect formation in the crystals and attenuated photovoltaic performance.

Cited by 14 publications

References 35 publications

Perovskite Solar Cells: Can We Go Organic‐Free, Lead‐Free, and Dopant‐Free?

Perovskite Solar Cells: Can We Go Organic‐Free, Lead‐Free, and Dopant‐Free?

Achieving Resistance against Moisture and Oxygen for Perovskite Solar Cells with High Efficiency and Stability

Structural Properties and Stability of Inorganic CsPbI₃ Perovskites

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Adverse oxidation of CsPbI2Br perovskite during the crystallization process in an N2 glove-box

Abstract: During annealing, surface oxidation leads to defect formation in the crystals and attenuated photovoltaic performance.

Cited by 14 publications

References 35 publications

Perovskite Solar Cells: Can We Go Organic‐Free, Lead‐Free, and Dopant‐Free?

Perovskite Solar Cells: Can We Go Organic‐Free, Lead‐Free, and Dopant‐Free?

Achieving Resistance against Moisture and Oxygen for Perovskite Solar Cells with High Efficiency and Stability

Structural Properties and Stability of Inorganic CsPbI3 Perovskites

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Adverse oxidation of CsPbI₂Br perovskite during the crystallization process in an N₂ glove-box

Structural Properties and Stability of Inorganic CsPbI₃ Perovskites