Cs4PbI6-Cl Nucleation Seeds Assisted Highly-Oriented Inorganic CsPbI3 Perovskites for Efficient Perovskite Solar Cells

Li, Shuang; Qiu, Junming; Zhuang, Rongshan; Zhou, Qisen; Zhang, Mingxu; Yu, Mubing; Hua, Yong; Zhang, Xiaoliang

doi:10.1021/acsaem.3c00146

Cited by 6 publications

(2 citation statements)

References 57 publications

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“…We assign these reflections to 1D DMAPbI 3 (11.6°) and 0D Cs 4 PbI 6 (11.9° and 12.1°) perovskite intermediate phases. [ 30,32,33 ] The presence of these two intermediate phases, which have been reported in the literature as precursors of black CsPbI 3 when the latter is prepared via the DMAI approach, indicates an incomplete conversion of the precursors to β‐CsPbI 3 . [ 22,29,30,34 ] Figure 1c displays the evolution of the phases during the annealing of CsPbI 3 .…”

Section: Resultsmentioning

confidence: 99%

The Stabilization of CsPbI_3−xBr_x Phase by Lowering Annealing Temperature for Efficient All‐Inorganic Perovskite Solar Cells

et al. 2023

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All‐inorganic perovskites are a promising solution for the fabrication of thermally stable perovskite solar cells (PSCs) with remarkable performances. However, a high annealing temperature is required for the stabilization of the photoactive phase of CsPbI3, which represents a limiting factor for their potential scaling‐up and manufacturing at industrial scale. This work demonstrates a new process for the stabilization of CsPbI3‐xBrx perovskite at lower annealing temperature of 180°, based on a rational halogen substitution enabled by the introduction of dimethylammonium (DMA) additives. Bromide inclusion favors indeed the conversion from the intermediate phases to CsPbI3‐xBrx. Standard mesoscopic solar cells prepared with this approach achieve a power conversion efficiency (PCE) of 14.86%, with reduced voltage losses and increased fill factor (FF) compared to the reference device. Moreover, this work proves that a rational substitution of the halide in the DMA salt is also beneficial for the devices annealed at higher temperature, achieving an encouraging PCE of 16.23%. By reducing the processing temperature, this new method widens the range of applications of all‐inorganic PSCs toward temperature‐sensitive materials and industrial applications.This article is protected by copyright. All rights reserved.

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Section: Resultsmentioning

confidence: 99%

The Stabilization of CsPbI_3−xBr_x Phase by Lowering Annealing Temperature for Efficient All‐Inorganic Perovskite Solar Cells

et al. 2023

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“…As presented in Figure 7F, the HACl 2 -based PSC yields an EQE EL of 0.0363% under an injection current density of approximately 20.8 mA cm −2 , which is much higher in comparison with that of the control PSC (EQE EL = 0.0018%) and the PEACl-based PSC (EQE EL = 0.0042%). According to these important results, we determined the reduced nonradiative recombination loss (ΔV OC,nonrad ) contributing to the V OC increase (ΔV OC ) based on the following formula 63 :…”

Section: Charge Carrier Extraction and Recombinationmentioning

confidence: 99%

Modulating CsPbl₃ crystallization by using diammonium agent for efficient solar cells

Qiu,

Zhou,

et al. 2023

SusMat

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Cesium lead triiodide (CsPbI3) perovskite receives tremendous attention for photovoltaic applications, owing to its remarkable thermal stability and optoelectronic properties. However, realizing the CsPbI3 perovskite with high black‐phase stability and optoelectronic properties remains a significant challenge, which largely affects the photovoltaic performance of perovskite solar cells (PSCs). Herein, aromatic ammonium agents are used to modulate the crystallization of the CsPbI3 perovskite to improve its black‐phase stability and optoelectronic properties for efficient PSCs. Systemically experimental studies and comprehensively theoretical calculations are performed, which reveal that histammonium dihydrochloride (HACl2) could strongly couple with the perovskite during its crystallization, leading to faster nucleation and slower perovskite growth, and thus modulating the crystallization dynamics of the perovskites. Moreover, the residual diammonium cations (HA2+) distributed at the grain boundaries and on the surface of the perovskites can effectively passivate defects through electrostatic interactions, substantially suppressing trap‐assisted nonradiative recombination, and prompting more matched perovskite surface energetics. Consequently, the photovoltaic performance of CsPbI3 PSCs is largely improved because of a combination of enhanced crystallinity and optoelectronic properties of the perovskites. This work offers a new avenue to prepare inorganic perovskites with high optoelectronic properties for photovoltaics.

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Dipolar Chemical Bridge Induced CsPbI₃ Perovskite Solar Cells with 21.86 % Efficiency

Qiu,

Mei,

Zhang

et al. 2024

Angewandte Chemie

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CsPbI3 perovskite receives tremendous attention for photovoltaic applications due to its ideal bandgap and good thermal stability. However, CsPbI3 perovskite solar cells (PSCs) significantly suffer from photovoltage deficits because of serious interfacial energy losses within the PSCs, which to a large extent affects the photovoltaic performance of PSCs. Herein, a dipolar chemical bridge (DCB) is constructed between the perovskite and TiO2 layers to lower interfacial energy losses and thus improve the charge extraction of PSCs. The results reveal that the DCB could form a beneficial interfacial dipole between the perovskite and TiO2 layers, which could optimize the interfacial energetics of perovskite/TiO2 layers and thus improve the energy level alignment within the PSCs. Meanwhile, the constructed DCB could also simultaneously passivate the surface defects of perovskite and TiO2 layers, greatly lowering interfacial recombination. Consequently, the photovoltage deficit of PSCs is largely reduced, leading to a record efficiency of 21.86% being realized. Meanwhile, the operation stability of PSCs is also largely improved due to the high‐quality perovskite films with released interfacial tensile strain being obtained after forming the DCB within the PSCs.

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Cs₄PbI₆-Cl Nucleation Seeds Assisted Highly-Oriented Inorganic CsPbI₃ Perovskites for Efficient Perovskite Solar Cells

Cited by 6 publications

References 57 publications

The Stabilization of CsPbI_3−xBr_x Phase by Lowering Annealing Temperature for Efficient All‐Inorganic Perovskite Solar Cells

The Stabilization of CsPbI_3−xBr_x Phase by Lowering Annealing Temperature for Efficient All‐Inorganic Perovskite Solar Cells

Modulating CsPbl₃ crystallization by using diammonium agent for efficient solar cells

Dipolar Chemical Bridge Induced CsPbI₃ Perovskite Solar Cells with 21.86 % Efficiency

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Cs4PbI6-Cl Nucleation Seeds Assisted Highly-Oriented Inorganic CsPbI3 Perovskites for Efficient Perovskite Solar Cells

Cited by 6 publications

References 57 publications

The Stabilization of CsPbI3−xBrx Phase by Lowering Annealing Temperature for Efficient All‐Inorganic Perovskite Solar Cells

The Stabilization of CsPbI3−xBrx Phase by Lowering Annealing Temperature for Efficient All‐Inorganic Perovskite Solar Cells

Modulating CsPbl3 crystallization by using diammonium agent for efficient solar cells

Dipolar Chemical Bridge Induced CsPbI3 Perovskite Solar Cells with 21.86 % Efficiency

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Cs₄PbI₆-Cl Nucleation Seeds Assisted Highly-Oriented Inorganic CsPbI₃ Perovskites for Efficient Perovskite Solar Cells

The Stabilization of CsPbI_3−xBr_x Phase by Lowering Annealing Temperature for Efficient All‐Inorganic Perovskite Solar Cells

The Stabilization of CsPbI_3−xBr_x Phase by Lowering Annealing Temperature for Efficient All‐Inorganic Perovskite Solar Cells

Modulating CsPbl₃ crystallization by using diammonium agent for efficient solar cells

Dipolar Chemical Bridge Induced CsPbI₃ Perovskite Solar Cells with 21.86 % Efficiency