Dimensional Tuning of Perylene Diimide‐Based Polymers for Perovskite Solar Cells with Over 24% Efficiency

Fu, Qiang; Tang, Xingchen; Gao, Yuping; Liu, Huan; Chen, Mingqian; Wang, Rui; Song, Zonglong; Yang, Yang; Wang, Jian; Liu, Yongsheng

doi:10.1002/smll.202301175

Cited by 10 publications

(8 citation statements)

References 52 publications

(80 reference statements)

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“…The certified power conversion efficiency (PCE) of singlejunction organic-inorganic hybrid perovskite solar cells (PSCs) Most of the current studies focus on passivating the upper surface, ignoring the critical impact of the buried interface on the performance and stability of PSCs. [12][13][14] Recent work by Huang et al found that the perovskite-buried interface has more morphological voids, higher submicron-scale extended defects, and higher defect concentrations than the top perovskite interfaces. [15][16][17] Several breakthroughs have been reported that improved buried interface [18] can be obtained through interfacial engineering of coherent FASnCl X interlayer for better interaction between SnO 2 and perovskite.…”

Section: Introductionmentioning

confidence: 99%

Target Therapy for Buried Interface Enables Stable Perovskite Solar Cells with 25.05% Efficiency

et al. 2023

Advanced Materials

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The buried interface in perovskite solar cells (PSCs) is pivotal for achieving high efficiency and stability. However, it is challenging to study and optimize the buried interface due to its non‐exposed feature. Here, a facile and effective strategy is developed to modify the SnO2/perovskite buried interface by passivating the buried defects in perovskite and modulating carrier dynamics via incorporating formamidine oxalate (FOA) in SnO2 nanoparticles. Both formamidinium and oxalate ions show a longitudinal gradient distribution in the SnO2 layer, mainly accumulating at the SnO2/perovskite buried interface, which enables high‐quality upper perovskite films, minimized defects, superior interface contacts, and matched energy levels between perovskite and SnO2. Significantly, FOA can simultaneously reduce the oxygen vacancies and tin interstitial defects on the SnO2 surface and the FA+/Pb2+ associated defects at the perovskite buried interface. Consequently, the FOA treatment significantly improves the efficiency of the PSCs from 22.40% to 25.05% and their storage‐ and photo‐stability. This method provides an effective target therapy of buried interface in PSCs to achieve very high efficiency and stability.

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Section: Introductionmentioning

confidence: 99%

Target Therapy for Buried Interface Enables Stable Perovskite Solar Cells with 25.05% Efficiency

et al. 2023

Advanced Materials

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“…47,48 Interface passivation is a simple and effective method for improved charge carrier transport, reduced nonradiative recombination, and enhanced PCE. 49,50 To achieve more efficient and stable 2D RP PSCs, we propose a predeposition transport layer (PDTL) strategy aimed at passivating the surface defects and enhancing the ETL properties through the establishment of a reinforced PCBM coverage over the perovskite layer. The flowchart outlining the PDTL processing is shown in Figure 2a.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Selenophene-Based 2D Ruddlesden-Popper Perovskite Solar Cells with an Efficiency Exceeding 19%

Fu,

Chen,

et al. 2023

J. Am. Chem. Soc.

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“…orientation with regard to the substrate, which are good candidates for high-performance interface materials. [31,32] Here, two 2D polymers were successfully developed and applied as interface materials in n-i-p structured PSCs. 2DP-BT and 2DP-Por had various lead anchoring groups.…”

Section: Introductionmentioning

confidence: 99%

2D Polymers with Lead Anchoring Groups Enable Perovskite Solar Cells with Over 24% Efficiency

Lai,

Tang,

et al. 2024

Solar RRL

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The hygroscopic dopants used in Spiro‐OMeTAD hole‐transport materials (HTMs) in n–i–p perovskite solar cells (PSCs) inevitably cause device degradation. Herein, two polymer interface materials based on lead anchoring groups are developed. It is found that 2D polymers 2DP‐BT and 2DP‐Por can form dense films and exhibit excellent hydrophobicity. Importantly, 2DP‐Por can passivate the surface defects through noncovalent interactions, reducing nonradiative recombination loss. After introducing these polymer interface materials between the perovskite layer and the HTM layer, the optimized devices using 2DP‐Por and 2DP‐BT achieve champion power conversion efficiency of 24.12% and 23.29%, respectively, and the stability is significantly improved. These results indicate that developing polymer interface materials containing lead anchoring groups can improve PSC efficiency and stability and elucidate critical molecular design rules for interface materials.

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Dimensional Tuning of Perylene Diimide‐Based Polymers for Perovskite Solar Cells with Over 24% Efficiency

Abstract: Scheme 1. Synthesis routes of polymers P-PDI and 2DP-PDI.

Cited by 10 publications

References 52 publications

Target Therapy for Buried Interface Enables Stable Perovskite Solar Cells with 25.05% Efficiency

Target Therapy for Buried Interface Enables Stable Perovskite Solar Cells with 25.05% Efficiency

Selenophene-Based 2D Ruddlesden-Popper Perovskite Solar Cells with an Efficiency Exceeding 19%

2D Polymers with Lead Anchoring Groups Enable Perovskite Solar Cells with Over 24% Efficiency

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