Tailoring pyridine bridged chalcogen-concave molecules for defects passivation enables efficient and stable perovskite solar cells

Nature Communications, Journal Year: 2025, Volume and Issue: 16(1)

Published: Jan. 11, 2025

Suppressing deep-level defects at the perovskite bulk and surface is indispensable for reducing non-radiative recombination losses improving efficiency stability of solar cells (PSCs). In this study, two Lewis bases based on chalcogen-thiophene (n-Bu4S) selenophene (n-Bu4Se) having tetra-pyridine as bridge are developed to passivate in film. The uncoordinated Pb2+ iodine vacancy can interact with chalcogen-concave group pyridine through formation acid-base adduct, particularly both be surrounded by concave molecules, resulting effective suppression charge recombination. This approach enables a power conversion (PCE) high 25.37% (25.18% certified) n-i-p PSCs stable operation 65 °C 1-sun illumination 1300 hours N2 (ISOS-L-2 protocol), retaining 94% initial efficiency. Our work provides insight into bowl-shaped base passivation coordinated strategy high-performance photovoltaic devices.

Language: Английский

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Trade-off effect of hydrogen-bonded dopant-free hole transport materials on performance of inverted perovskite solar cells

Nano Energy, Journal Year: 2024, Volume and Issue: 128, P. 109870 - 109870

Published: June 12, 2024

Language: Английский

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Mitigating V_OC Loss in Single‐Junction and Four‐Terminal Tandem Perovskite/Si Photovoltaics with D‐A Phthalocyanines Layers

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 6, 2024

Abstract The performance of perovskite solar cells (PSCs) is often constrained by significant open‐circuit voltage ( V OC ) losses attributed to non‐radiative recombination processes induced detrimental trap states. Surface treatments using passivating ligands typically involve single active binding sites on perovskite, posing challenges for effective passivation. Here, an aromatic donor‐acceptor (D‐A) configured phthalocyanine treatment proposed aim at dual‐site passivation uncoordinated lead ions and mitigation shallow deep‐level defects the surface. resulting benign p‐type surface facilitates a more favorable energy level alignment reduces energetic mismatches perovskite/Spiro‐OMeTAD interface. Pc‐BTBC, with its D‐A configuration, demonstrated compatibility various compositions. Optimized PSCs achieves power conversion efficiency (PCE) 25.15% deficit 0.379 V. Furthermore, encapsulated devices exhibited enhanced stability under damp‐heat conditions (ISOS‐D‐2, 50% RH, 65°C) T 92 1000 h maintained maximum point tracking continuous light in ambient air 65°C (ISOS‐L‐2). Notably, fabricated wide‐bandgap semitransparent (ST‐PSCs) achieved PCE 20.29%, while four‐terminal perovskite/silicon tandem (4T‐P/STSCs) 29.38%. This study provides insights into minimizing represents progress toward commercializing photovoltaics.

Language: Английский

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Reinforcing Coverage of Self‐assembled Monomolecular Layers for Inverted Perovskite Solar Cells with Efficiency of 25.70%

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 30, 2024

Abstract Self‐assembled monolayers (SAM) as hole transport layers have been widely used in high‐efficiency inverted perovskite solar cells (PSCs) exceeded 26 %. However, the poor coverage and non‐uniform distribution on substrate of SAM further restrict improvement device performance. Herein, we utilize mixed strategy via MeO‐2PACz along with perfluorotripropylamine (FC‐3283) to improve coverage, aiming accelerate carrier transport, promote growth, regulate surface energy levels suppress nonradiative recombination. The champion mixed‐SAM achieves an efficiency 25.70 % (certified 25.6 %) long‐term stability (maintained initial 90 after 1000 h 180 under ISOS‐L‐1 ISOS‐L‐2).

Language: Английский

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Tailoring Interfacial Dipole Molecules to Mitigate Carrier and Energy Losses in Perovskite Solar Cells

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 11, 2024

Abstract Interface engineering has become the mainstream for improving performance of perovskite solar cells (PSCs). Interfacial dipole (ID) molecules have emerged as a feasible and effective strategy to alleviate charge carrier loss energy in PSCs. Here, three symmetrical donor–acceptor interfacial (named PzT, PzTE, PzTN) are designed synthesized with identical hole transport backbone different anchoring groups. The ID molecule is introduced into interface between layer layer. moments regulate surface work function energy‐level alignment perovskites, improve extraction, reduce at interface. Meanwhile, groups coordinate defects on PVK HTL, trap state density accumulation, mitigate non‐radiative recombination losses. As result, PzTN‐modified PSC achieved champion power conversion efficiency 25.34% photovoltage 1.176 V fill factor (FF) 83.27%, accompanied by almost undetectable hysteresis excellent operating stability. This research demonstrates efficient stable PSCs molecules.

Language: Английский

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Charge distribution manipulation in fluorine-containing additives enables highly efficient and stable perovskite solar cells

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 160571 - 160571

Published: Feb. 1, 2025

Language: Английский

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Minimizing Interfacial Energy Losses with Carbon Dot Bifacial Modification Layers for High‐Efficiency and Stable Perovskite LEDs

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 16, 2025

Abstract Perovskite light‐emitting diodes (PeLEDs) have reached near‐unity photoluminescent quantum yields (PLQYs), but further improvements in electroluminescent efficiency are constrained by interfacial energy losses between the emissive layer and charge transport layers. In this study, multifunctional carbon dot organic frameworks (CDOFs) introduced as a dual‐interface modification material for perovskite layer. This approach effectively passivates both upper buried interfaces, boosting PLQY to nearly 100% enabling an external of 28.0%. The CDOFs also facilitate balanced injection, achieving low turn‐on voltage only 1.9 V, significantly below bandgap voltage. Additionally, exceptional defect passivation imparted bolsters structural stability, T 50 operational lifetime 81.7 min at initial ultrahigh luminance 10 000 cd m −2 , with no detectable Joule heating. study underscores potential advancing PeLED performance.

Language: Английский

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Low Dielectric and High Thermal Conductivity Polyimide Nanocomposites with Fully Closed-Loop Recycling and Highly Consistent Healing

Composites Part B Engineering, Journal Year: 2025, Volume and Issue: unknown, P. 112390 - 112390

Published: March 1, 2025

Language: Английский

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Improved photoelectric performance of perovskite solar cells with interfacial dipole molecules

Science China Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: March 19, 2025

Language: Английский

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Cross‐Linkable Fullerene Electron Transport Layer with Internal Encapsulation Capability for Efficient and Stable Inverted Perovskite Solar Cells

Angewandte Chemie, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 17, 2024

Abstract A stable and compact fullerene electron transport layer (ETL) is crucial for high‐performance inverted perovskite solar cells (PSCs). However, traditional fullerene‐based ETLs like C 60 PCBM are prone to aggregate under operational conditions, a challenge recently recognized by academic industrial researchers. Here, we designed synthesized novel cross‐linkable molecule, bis((3‐methyloxetan‐3‐yl)methyl) malonate‐C monoadduct (BCM), use as an ETL in PSCs. Upon low‐temperature annealing at 100 °C, BCM undergoes situ cross‐linking form robust cross‐linked (CBCM) film, which demonstrates excellent mobility suitable band structure efficient Our results show that PSCs incorporating CBCM‐based achieve impressive efficiency of 25.89 % (certified: 25.36 %), significantly surpassing the 23.25 PCBM‐based devices. The intramolecular covalent interactions within CBCM films effectively prevent aggregation enhance film compactness, creating internal encapsulation mitigates decomposition ion migration components. Consequently, exceptional stability, maintaining 97.8 their initial after 1000 hours maximum power point tracking, compared only 78.6 retention devices less than 820 hours.

Language: Английский

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