High thermoelectric performance based on CsSnI<sub>3</sub> thin films with improved stability

Tang, Weidong; Liu, Tianjun; Fenwick, Oliver

doi:10.1039/d1ta11093d

Cited by 15 publications

(13 citation statements)

References 47 publications

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“…This tunability of electrical properties makes Sn-based halides promising as p-type thermoelectric materials. [76,101,105,106] However, at the same time, the oxidation of Sn ions is extremely sensitive to various factors, such as composition and histories of preparation and storage. Thus, the reproducibility and stability issues remain as important obstacles to overcome.…”

Section: Effect Of B-site Metal Cationsmentioning

confidence: 99%

Thermal Transport Properties of Phonons in Halide Perovskites

et al. 2023

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Halide perovskites have emerged as promising candidates for various applications, such as photovoltaic, optoelectronic and thermoelectric applications. The knowledge of the thermal transport of halide perovskites is essential for enhancing the device performance for these applications and improving the understanding of heat transport in complicated material systems with atomic disorders. In this work, the current understanding of the experimentally and theoretically obtained thermal transport properties of halide perovskites is reviewed. This study comprehensively examines the reported thermal conductivity of methylammonium lead iodide, which is a prototype material, and provides theoretical frameworks for its lattice vibrational properties. The frameworks and discussions are extended to other halide perovskites and derivative structures. The implications for device applications, such as solar cells and thermoelectrics, are discussed.

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Section: Effect Of B-site Metal Cationsmentioning

confidence: 99%

Thermal Transport Properties of Phonons in Halide Perovskites

et al. 2023

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Section: Intrinsic Dopingmentioning

confidence: 99%

“…[ 29 ] In addition to solution process, thermal vapor deposition was validated as an effective method to strengthen the TE performance of MHPs by formation of high‐quality CsSnI 3 thin films. [ 50,36 ] The deposition sequence of the precursors (CsI and SnI 2 ) strongly affects the electrical stability, which is resulted from an incomplete reaction between the two precursor layers and thus an inhomogeneous distribution of the elements. As shown in Figure 3f, spontaneous self‐doping process of CsSnI 3 was both observed in inert atmosphere and air, delivering ≈1.6× and 10× increase of σ , respectively.…”

Section: Impacts Of Strategic Doping On Electrical Transportation In ...mentioning

confidence: 99%

“…The air oxidation of CsSnI 3 was found to be much faster than that of the hybrid systems and was notably accelerated at elevated temperatures. [ 50 ] Nevertheless, accelerating the self‐doping process by air penetration is accompanied by the decomposition of lattice structure and thus the decrease of σ as verified by X‐ray diffraction and scanning electron microscope, which might also give rise to the stability issues. In a more recent study, the oxidation product of CsSnI 3 was investigated for TE applications.…”

Section: Impacts Of Strategic Doping On Electrical Transportation In ...mentioning

confidence: 99%

“…f) Time dependent 𝜎 of CsI/SnI 2 sequential (CSS) and SnI 2 /CsI sequential (SCS) CsSnI 3 thin films in nitrogen atmosphere and in air. Reproduced with permission [50]. Copyright 2022, Royal Society of Chemistry.…”

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Strategic Doping in Metal Halide Perovskites for Thermoelectrics

Chen

Liang

2023

Adv Funct Materials

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Metal halide perovskites (MHPs) have not only shown unique merits of ultralow thermal conductivity compared to traditional inorganic thermoelectric (TE) materials, but also featured superior Seebeck effect to organic semiconductors, thereby affording great prospect in TE field. However, their severely poor electrical conductivity significantly hinders TE applications, which results from the restrained doping efficiency due to the limited accommodation capability of heterogeneous dopants and the heavy compensation from interior defects in MHPs. Realizing high‐effectiveness electrical doping in MHPs becomes imperative yet remains extremely challenging. This Minireview is therefore intended to sort out the diversified doping strategies and highlight their underlying impacts on both thermal and electrical transportation in MHPs. These strategies are systematically classified into bulk and surface/interface doping as dictated by where the dopants are implemented while unravelling how they critically impact TE properties in distinctive means. A rational guideline is hence derived to strengthen electrical doping towards desirable perovskite TEs.

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Lead‐Free Perovskite Light‐Emitting Diodes

Tang,

Liu,

Zhang

et al. 2024

Advanced Materials

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Metal halide perovskites have been identified as a promising class of materials for light‐emitting applications. The development of lead‐based perovskite light‐emitting diodes (PeLEDs) has led to substantial improvements, with external quantum efficiencies (EQEs) now surpassing 30% and operational lifetimes comparable to those of organic LEDs (OLEDs). However, the concern over the potential toxicity of lead has motivated a search for alternative materials that are both eco‐friendly and possess excellent optoelectronic properties, with lead‐free perovskites emerging as a strong contender. In this review, the properties of various lead‐free perovskite emitters are analyzed, with a particular emphasis on the more well‐reported tin‐based variants. Recent progress in enhancing device efficiencies through refined crystallization processes and the optimization of device configurations is also discussed. Additionally, the remaining challenges are examined, and propose strategies that may lead to stable device operation. Looking forward, the potential future developments for lead‐free PeLEDs are considered, including the extension of spectral range, the adoption of more eco‐friendly deposition techniques, and the exploration of alternative materials.

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High thermoelectric performance based on CsSnI₃ thin films with improved stability

Abstract: Tin-based metal halide perovskites have been considered as promising candidates in the field of thermoelectric materials due to their ultralow thermal conductivity and considerable electrical conductivity. However, the mechanism of...

Cited by 15 publications

References 47 publications

Thermal Transport Properties of Phonons in Halide Perovskites

Thermal Transport Properties of Phonons in Halide Perovskites

Strategic Doping in Metal Halide Perovskites for Thermoelectrics

Lead‐Free Perovskite Light‐Emitting Diodes

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High thermoelectric performance based on CsSnI3 thin films with improved stability

Abstract: Tin-based metal halide perovskites have been considered as promising candidates in the field of thermoelectric materials due to their ultralow thermal conductivity and considerable electrical conductivity. However, the mechanism of...

Cited by 15 publications

References 47 publications

Thermal Transport Properties of Phonons in Halide Perovskites

Thermal Transport Properties of Phonons in Halide Perovskites

Strategic Doping in Metal Halide Perovskites for Thermoelectrics

Lead‐Free Perovskite Light‐Emitting Diodes

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Product

Resources

About

High thermoelectric performance based on CsSnI₃ thin films with improved stability