Thermally Stable, Efficient, Vapor Deposited Inorganic Perovskite Solar Cells

Gaonkar, Harshavardhan; Zhu, Junhao; Kottokkaran, Ranjith; Bhageri, Behrang; Noack, Max; Dalal, Vikram L.

doi:10.1021/acsaem.0c00010

Cited by 27 publications

(17 citation statements)

References 38 publications

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“…There have been plenty of feasible methods to improve the thermal stability of PSCs. For instance, component engineering, additive incorporation, surface passivation, and process optimization are generally employed to improve the heat resistance of perovskite absorbers with substantially improved film quality and effective defect passivation . In addition, with regard to the carrier transport layer employing unstable organic materials, i.e., 2,2′,7,7′-tetrakis( N , N -di- p -methoxyphenylamine)-9,9′-spirobifluorene (spiro-OMeTAD), which has a poor thermal stability due to its low glass transition temperature, , researchers have found or synthesized a series of more thermally stable alternatives, such as poly(bis(4-phenyl)(2,4,6-trimethylphenyl)-amine) (PTAA), CuSCN, etc., to effectively prolong the lifetime of PSCs under thermal stressors.…”

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confidence: 99%

Thermal Management Enables More Efficient and Stable Perovskite Solar Cells

Pei

Chen

et al. 2021

ACS Energy Lett.

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Under thermal stress, perovskite materials suffer from volatile component loss or ion migration, etc., which is challenging for steady power output (SPO) of the resulting perovskite solar cells (PSCs) under practical operation conditions. Herein, we innovatively introduce silicon dioxide particles at the perovskite/hole transport layer interface, which simultaneously serve as heat dissipation material due to their higher thermal conductivity and a perovskite surface passivator through the coordination between silicon dioxide and the undercoordinated lead centers. The resultant device achieves substantially improved long-term stability with a power conversion efficiency (PCE) of 22.29% for a thermally stable composition. The unencapsulated devices retain 91 and 95% of initial efficiency after thermal aging at 85 °C for 1126 h and SPO operation for 1235 h in a nitrogen atmosphere, respectively. Our work effectively combines thermal management and the passivation effect to improve the efficiency and stability of PSCs under actual operation.

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confidence: 99%

Thermal Management Enables More Efficient and Stable Perovskite Solar Cells

Pei

Chen

et al. 2021

ACS Energy Lett.

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“…Compared to hybrid perovskites, inorganic perovskites CsPbX 3 (X = Cl, Br, I) show better stability. However, the literature reports that CsPbI 3 is only stable in the suitable perovskite phase at temperatures higher than 300 °C . CsPbI 3 can easily transform rapidly in air to a yellow-colored nonperovskite polymorph that is thermodynamically more stable at ambient temperature.…”

Section: Resultsmentioning

confidence: 99%

“…However, the literature reports that CsPbI 3 is only stable in the suitable perovskite phase at temperatures higher than 300 °C. 47 CsPbI 3 can easily transform rapidly in air to a yellow-colored nonperovskite polymorph that is thermodynamically more stable at ambient temperature. This perovskite-to-nonperovskite transition is mostly due to the relatively low tolerance factor (0.80) that results in structural instability.…”

Section: Resultsmentioning

confidence: 99%

Material Properties Modulation in Inorganic Perovskite Films via Solution-Free Solid-State Reactions

Reyes-Banda¹,

Fernández‐Izquierdo²,

Krishnan³

et al. 2021

ACS Appl. Electron. Mater.

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A simple solvent-free, versatile, and flexible route for material properties modulation in halide perovskite thin films has been developed using CsPbBr3 thin films. The method further enables composition and morphology control using a solid-state ion-exchange reaction in the presence of PbX2 (X= Cl, Br, I) vapor in a close-spaced sublimation deposition system. The morphology, structure, and optoelectronic properties of the resulting CsPb(Br1–x X x )3 (X = Cl, Br, I) films, as well as the performance of PN junction diodes are systematically investigated and discussed. The CsPb(Br1–x X x )3 films maintained an orthorhombic structure with increased mobility and remarkable grain growth with grains as large as 25 μm in films as thick as 8 μm. The CsPb(Br1–x X x )3 films enabled diodes with a very low leakage current (1 × 10–8 A/mm2), likely due to the large crystalline grains. The diodes were used as radiation detectors, with superior alpha particle sensing from a 210Po source. This simple, scalable, solution-free, and cost-effective perovskite annealing process can be applied in other perovskite systems to also tune their band gap in the range of 1.7–2.9 eV and tailor their transport electronic properties to further expand the application of these exceptional materials.

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“…Furthermore, it was suggested that the prolonged charge carrier lifetime of vapor‐deposited CsPbI 3 films leads to significant improvement of device efficiency as compared with their spin‐coated counterparts. Gaonkar et al [ 176 ] studied the influence of various important parameters of the perovskite preparation process such as substrate temperatures and precursor layer thickness that regulate the intermixing of the perovskite layer and their influence on the hysteresis and photovoltaic performance of mixed halide CsPbI x Br( 3− x ) perovskite. To prepare the correct stoichiometric perovskite, the precise control of thickness of the individual precursor layers (CsBr and PbI 2 ) is a critical parameter.…”

Section: Dual‐source Evaporation Depositionmentioning

confidence: 99%

Evaporation Deposition Strategies for All‐Inorganic CsPb(I_1–xBr_x)₃Perovskite Solar Cells: Recent Advances and Perspectives

et al. 2021

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The preparation route has striking impacts on the morphology and photovoltaic performance of the solar cells, and the development of a feasible preparation strategy to make such a technology applicable to industry is of utmost significance. Compared with solution processing, the vapor deposition strategy has been demonstrated as an effective way to fabricate compact and uniform perovskite thin films with excellent versatility and controllability. While the vast majority of literature emphasizes solution processing as the deposition method for perovskite solar cells (PSCs), vapor‐deposited PSCs are closing the performance gap with numerous research reports of efficiencies above 20%. Thus, an in‐time review is critical to summarize the fundamentals of vapor‐based deposition strategies to evaluate their real potential and put challenges into perspective. Herein, various vapor deposition routes for the preparation of all‐inorganic perovskite films and solar cells are thoroughly addressed. Moreover, the critical factors such as deposition temperature, film thickness, substrate temperature, and annealing conditions that impact the film quality and photovoltaic performance of the perovskite are reviewed. In the end, conclusion and future possibilities of the vapor deposition processes are presented, which will offer constructive guidance for the large‐scale fabrication of solar cells.

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Thermally Stable, Efficient, Vapor Deposited Inorganic Perovskite Solar Cells

Cited by 27 publications

References 38 publications

Thermal Management Enables More Efficient and Stable Perovskite Solar Cells

Thermal Management Enables More Efficient and Stable Perovskite Solar Cells

Material Properties Modulation in Inorganic Perovskite Films via Solution-Free Solid-State Reactions

Evaporation Deposition Strategies for All‐Inorganic CsPb(I_1–xBr_x)₃Perovskite Solar Cells: Recent Advances and Perspectives

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Thermally Stable, Efficient, Vapor Deposited Inorganic Perovskite Solar Cells

Cited by 27 publications

References 38 publications

Thermal Management Enables More Efficient and Stable Perovskite Solar Cells

Thermal Management Enables More Efficient and Stable Perovskite Solar Cells

Material Properties Modulation in Inorganic Perovskite Films via Solution-Free Solid-State Reactions

Evaporation Deposition Strategies for All‐Inorganic CsPb(I1–xBrx)3Perovskite Solar Cells: Recent Advances and Perspectives

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Evaporation Deposition Strategies for All‐Inorganic CsPb(I_1–xBr_x)₃Perovskite Solar Cells: Recent Advances and Perspectives