Self‐Induced Bi‐interfacial Modification via Fluoropyridinic Acid For High‐Performance Inverted Perovskite Solar Cells

Advanced Energy Materials, Год журнала: 2024, Номер unknown

Опубликована: Окт. 31, 2024

Abstract The uncontrolled crystallization of perovskite generates a significant number internal and interfacial defects, posing major challenge to the performance solar cells (PSCs). In this paper, novel bi‐interfacial modification strategy utilizing 5‐fluoropyridinic acid (FPA) is proposed modulate crystal growth provide defect passivation. It demonstrated that FPA self‐deposited at both top bottom interfaces films during thermal annealing. CO N functional groups in serve as chelating agents, binding closely uncoordinated Pb 2+ /Pb clusters, thereby passivating defects reducing charge recombination interfaces. strong chemical interactions between further stabilize Pb‐I framework, promoting formation high‐quality films, confirmed by situ photoluminescence measurements. Consequently, modified inverted PSCs achieved an exceptional power conversion efficiency (PCE) 25.37%. Moreover, devices retained over 93.17% initial after 3000 h continuous illumination under one‐sun equivalent conditions nitrogen atmosphere. This paper presents promising pathway for enhancing stability through self‐induced approach.

Язык: Английский

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Methylammonium-free, high-efficiency, and stable all-perovskite tandem solar cells enabled by multifunctional rubidium acetate

Nature Communications, Год журнала: 2025, Номер 16(1)

Опубликована: Янв. 30, 2025

All-perovskite tandem solar cells (APTSCs) offer the potential to surpass Shockley-Queisser limit of single-junction at low cost. However, high-performance APTSCs contain unstable methylammonium (MA) cation in tin-lead (Sn-Pb) narrow bandgap subcells. Currently, MA-free Sn-Pb perovskite (PSCs) show lower performance compared with their MA-containing counterparts. This is due high trap density associated Sn2+ oxidation, which exacerbated by rapid crystallization Sn-containing perovskite. Here, a multifunctional additive rubidium acetate (RbAC) proposed passivate We find that RbAC can suppress alleviate microstrain, and improve crystallinity Consequently, resultant PSCs achieve power conversion efficiency (PCE) 23.02%, an open circuit voltage (Voc) 0.897 V, filling factor (FF) 80.64%, more importantly stability device significantly improved. When further integrated 1.79-electron volt wide-bandgap PSC, 29.33% (certified 28.11%) efficient Voc 2.22 volts achieved. The tin (II) oxidation impacts cation-free cells. authors employ for defect passivation stable all-perovskite

Язык: Английский

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Dual Interface Passivation With Multi‐Site Regulation Toward Efficient and Stable Inverted Perovskite Solar Cells

Advanced Energy Materials, Год журнала: 2025, Номер unknown

Опубликована: Фев. 23, 2025

Abstract The rapid crystallization process of perovskite produces a large number defects that remain critical factor disturbs the performance solar cells (PSCs). In this research, these challenges are mitigated by introducing multifunctional 2,6‐pyridinedicarboxylic acid chloride (PAC) as an additive into perovskite. During thermal annealing process, predominant accumulation PAC occurs at upper and buried interfaces film. possesses multiple passivating sites facilitate anchoring lead iodine defects, thereby enhancing quality material across both its dual grain boundaries. With unique property, combined with advantages enhanced crystallization, reduced non‐radiative recombination, boosted charge carrier mobility, optimal energy level alignment, PSC achieved power conversion efficiency (PCE) 25.60% maintained more than 90% after 3000 h under one equivalent light 1400 dark high temperature (85 °C). interface passivation strategy provides sustainable solution to stability environmental for commercialization cells.

Язык: Английский

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Synergistic immobilization of ions in mixed tin-lead and all-perovskite tandem solar cells

Nature Communications, Год журнала: 2025, Номер 16(1)

Опубликована: Апрель 11, 2025

Low-bandgap (LBG) mixed tin-lead (Sn-Pb) perovskite solar cells (PSCs) suffer from inferior performance due to their high defect density. Conventionally, ethylenediammonium diiodide (EDADI) is used as a surface passivator reduce defects and improve device photovoltaic performance, but it introduces severe hysteresis caused by excessive mobilized ions at the top interface. Here, we report mobile ion suppressing strategy of using hydrazine monohydrochloride (HM) bulk anchor free in LBG perovskites. The protonated (N2H5+) HM formed hydrogen bonds with iodine (I-) ions, while chloride (Cl-) occupied I- vacancies, collectively impeding migration thus mitigating movement-induced that arose EDADI usage. synergistic doping post-treatment significantly suppresses oxidation Sn2+, decreases trap density, inhibits rapid crystallization perovskite. Consequently, achieved champion efficiency 23.21% for PSCs. Integrating these wide-bandgap PSCs into all-perovskite tandem yields 28.55% (certified 28.31%) negligible hysteresis.

Язык: Английский

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Enhanced Interlayer Interactions in Tin Halide Perovskite Solar Cells with a Fluorinated Fullerene Derivative

The Journal of Physical Chemistry Letters, Год журнала: 2025, Номер unknown, С. 1261 - 1266

Опубликована: Янв. 26, 2025

Lead-free tin halide perovskite solar cells (TPSCs) have recently made significant progress in power conversion efficiency (PCE). However, the presence of mismatched energy levels and weak interlayer interactions between electron transport materials (ETMs) perovskites has limited achievable PCE. Here, a new fluorinated fullerene derivative, C60-FTPA (F12), was designed synthesized to construct binary ETM with C60-ETPA (F6) reported our group, resulting reduction defects improved molecular structure ordering. Furthermore, exhibited stronger interaction delivered PCE up 11.93%.

Язык: Английский

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Self‐Assembled Charge Bridge Path at the Sn‐Pb Perovskite/C₆₀ Interface for High‐Efficiency All‐Perovskite Tandem Solar Cells

Small, Год журнала: 2025, Номер unknown

Опубликована: Янв. 31, 2025

Narrow bandgap mixed tin-lead perovskite solar cells (PSCs) have garnered substantial research interest owing to their remarkable optoelectronic properties. However, non-radiative recombination and carrier transport losses at the interface between layer charge (C60) significantly reduce overall efficiency of PSCs. To address this challenge, 9-Fluorenylmethyl carbazate (9FC) is incorporated C60. The hydrazide group present in 9FC effectively mitigates oxidation Sn2+. Furthermore, can engage chemical bonding with perovskite, while outward-facing aromatic rings create effective π-π interactions C60, thereby promoting enhanced interfacial transfer. highest-performing PSCs achieve a power conversion (PCE) 23.97%, accompanied by an impressive open-circuit voltage 0.91 V. Additionally, these facilitate development highly efficient two-terminal four-terminal all-perovskite tandem cells, which demonstrate efficiencies 27.01% 28.07%, respectively.

Язык: Английский

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Exploring the structural and electronic properties of fullerenes for advanced photodetectors, diodes, and solar cell applications

Journal of Industrial and Engineering Chemistry, Год журнала: 2025, Номер unknown

Опубликована: Фев. 1, 2025

Язык: Английский

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C ₆₀ -based ionic salt electron shuttle for high-performance inverted perovskite solar modules

Science, Год журнала: 2025, Номер unknown

Опубликована: Апрель 17, 2025

Although C 60 is usually the electron transport layer (ETL) in inverted perovskite solar cells, its molecular nature of leads to weak interfaces that lead non-ideal interfacial electronic and mechanical degradation. Here, we synthesized an ionic salt from , 4-(1',5′-dihydro-1'-methyl-2' H -[5,6] fullereno-C - I h -[1,9-c]pyrrol-2'-yl) phenylmethanaminium chloride (CPMAC), used it as shuttle PSCs. The CH 2 -NH 3 + head group CPMA cation improved ETL interface enhanced packing, leading ~3-fold increase toughness compared . Using CPMAC, obtained ~26% power conversion efficiencies (PCEs) with ~2% degradation after 2,100 hours 1-sun operation at 65°C. For minimodules (four subcells, 6 centimeters square), achieved PCE ~23% <9% 2,200 55°C.

Язык: Английский

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Inhibition oxidation of Sn(II) and regulation crystallization of Sn-Pb perovskite film through interaction engineering for high-performance photovoltaic

Chemical Engineering Journal, Год журнала: 2024, Номер 500, С. 157236 - 157236

Опубликована: Окт. 30, 2024

Язык: 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, Год журнала: 2024, Номер unknown

Опубликована: Окт. 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.

Язык: Английский

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