Sulfur vacancy defects healing of WS2 quantum dots boosted hole extraction for all-inorganic perovskite solar cells

Sui, Haojie; He, Benlin; Ti, Junjie; Sun, Shouhao; Jiao, Wenjing; Chen, Haiyan; Duan, Yanyan; Yang, Peizhi; Tang, Qunwei

doi:10.1016/j.cej.2022.140728

Cited by 16 publications

(7 citation statements)

References 48 publications

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“…56 The relationship between J SC and light intensity also delivers the ideality factor closer to 1, demonstrating the suppressed radiative recombination under short-circuit conditions, respectively. 61,62 This is also confirmed by the reduced leakage current (Figure 4d) and extended electron lifetime (Figure S13), which is in agreement with the improved film quality as discussed above. 63 Wide-bandgap mixed-halide perovskites are highlighted by their application in tandem cells.…”

Section: ■ Results and Discussionsupporting

confidence: 83%

Healing the Buried Interface by a Plant-Derived Green Passivator for Carbon-Based CsPbIBr₂ Perovskite Solar Cells

Qi,

Li,

Zhang

et al. 2024

ACS Appl. Mater. Interfaces

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Perovskite solar cells (PSCs) have attracted extensive attention in photovoltaic applications owing to their superior efficiency, and the buried interface plays a significant role in determining the efficiency and stability of PSCs. Herein, a plant-derived small molecule, ergothioneine (ET), is adopted to heal the defective buried interface of CsPbIBr 2 -based PSC to improve power conversion efficiency (PCE). Because of the strong interaction between Lewis base groups (−C�O and − C�S) in ET and uncoordinated Pb 2+ in the perovskite film from the theoretical simulations and experimental results, the defect density of the CsPbIBr 2 perovskite film is significantly reduced, and therefore, the nonradiative recombination in the corresponding device is simultaneously suppressed. Consequently, the target device achieves a high PCE of 11.13% with an open-circuit voltage (V OC ) of 1.325 V for hole-free, carbon-based CsPbIBr 2 PSCs and 14.56% with a V OC of 1.308 V for CsPbI 2 Br PSCs. Furthermore, because of the increased ion migration energy, the detrimental phase segregation in this mixed-halide perovskite is weakened, delivering excellent long-term stability for the unencapsulated device in ambient conditions over 70 days with a 96% retention rate of initial efficiency.

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Section: ■ Results and Discussionsupporting

confidence: 83%

Healing the Buried Interface by a Plant-Derived Green Passivator for Carbon-Based CsPbIBr₂ Perovskite Solar Cells

Qi,

Li,

Zhang

et al. 2024

ACS Appl. Mater. Interfaces

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“…The doped CsPbBr 3 PSCs show a significantly increased built-in potential ( V bi ) and slope compared to that of the original device, indicating a larger driving force for charge separation and transport and a lower interfacial charge accumulation in the former PSCs due to the matched interface energy level. 33 This result again validates the reduction of charge recombination in the doped CsPbBr 3 PSCs. Fig.…”

Section: Resultssupporting

confidence: 76%

“…facial charge accumulation in the former PSCs due to the matched interface energy level. 33 This result again validates the reduction of charge recombination in the doped CsPbBr 3 PSCs. Fig.…”

Section: Dalton Transactions Papersupporting

confidence: 76%

Synergistic effect of alkali metal doping and thiocyanate passivation in CsPbBr₃ for HTM-free all-inorganic perovskite solar cells

Jiang¹,

Sui²,

He³

et al. 2023

Dalton Trans.

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“…[9][10][11][12] Despite the PCE enhancement of CsPbI 3 from 3% to more than 21%, there still remain challenges for commercialization, the most serious of which is the phase change of α-CsPbI 3 . [13,14] Such phase transition originated from the small size of Cs ions, which cannot support the cubic structure of the perovskite, leading to the structural collapse. [15,16] Currently, there are four structures of CsPbI 3 reported, including cubic structure (α), tetragonal structure (β), and two kinds of orthorhombic structures (γ and δ).…”

Section: Introductionmentioning

confidence: 99%

Hindered Phase Transition Kinetics of α‐CsPbI₃ by External Tension

et al. 2023

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Recently, the all‐inorganic perovskite solar cells have attracted large amount of attention, due to the much better water resistance compared to the organic counterparts. Unfortunately, the undesired phase transition remained a significant challenge, despite the many attempts. An important step forward has been made here by numerical simulation, which discovered the significance of external strain to the stability of desired α‐CsPbI3, whose lifetime can be extended up to 3 times by non‐hydrostatic tension, as has been verified by both modelling and experimental results. In addition, such lifetime could be even enhanced further by hydrostatic tension, as indicated by the simulation. The unexpected observation provided not only an effective method to extend the lifetime of the perovskite devices, but also opened an unexpected path for the wide research community to utilise the straining engineering method that has been extensively investigated in the perovskite research.This article is protected by copyright. All rights reserved.

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Sulfur vacancy defects healing of WS2 quantum dots boosted hole extraction for all-inorganic perovskite solar cells

Cited by 16 publications

References 48 publications

Healing the Buried Interface by a Plant-Derived Green Passivator for Carbon-Based CsPbIBr₂ Perovskite Solar Cells

Healing the Buried Interface by a Plant-Derived Green Passivator for Carbon-Based CsPbIBr₂ Perovskite Solar Cells

Synergistic effect of alkali metal doping and thiocyanate passivation in CsPbBr₃ for HTM-free all-inorganic perovskite solar cells

Hindered Phase Transition Kinetics of α‐CsPbI₃ by External Tension

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Sulfur vacancy defects healing of WS2 quantum dots boosted hole extraction for all-inorganic perovskite solar cells

Cited by 16 publications

References 48 publications

Healing the Buried Interface by a Plant-Derived Green Passivator for Carbon-Based CsPbIBr2 Perovskite Solar Cells

Healing the Buried Interface by a Plant-Derived Green Passivator for Carbon-Based CsPbIBr2 Perovskite Solar Cells

Synergistic effect of alkali metal doping and thiocyanate passivation in CsPbBr3 for HTM-free all-inorganic perovskite solar cells

Hindered Phase Transition Kinetics of α‐CsPbI3 by External Tension

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Healing the Buried Interface by a Plant-Derived Green Passivator for Carbon-Based CsPbIBr₂ Perovskite Solar Cells

Healing the Buried Interface by a Plant-Derived Green Passivator for Carbon-Based CsPbIBr₂ Perovskite Solar Cells

Synergistic effect of alkali metal doping and thiocyanate passivation in CsPbBr₃ for HTM-free all-inorganic perovskite solar cells

Hindered Phase Transition Kinetics of α‐CsPbI₃ by External Tension