A ZnO&GeSe composite electron transport layer for organic solar cells

Journal of Materials Chemistry A, Journal Year: 2023, Volume and Issue: 12(3), P. 1530 - 1542

Published: Nov. 29, 2023

The deposition of 2D GeSe on the surface ZnO improves stability and reduces probability forming defect vacancies ZnO, thereby achieving high photoelectric conversion efficiency.

Language: Английский

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Synergetic Regulation of Interface Defects and Carriers Dynamics for High‐Performance Lead‐Free Perovskite Solar Cells

Small, Journal Year: 2023, Volume and Issue: 20(12)

Published: Nov. 8, 2023

Abstract Severe nonradiative recombination and open‐circuit voltage loss triggered by high‐density interface defects greatly restrict the continuous improvement of Sn‐based perovskite solar cells (Sn‐PVSCs). Herein, a novel amphoteric semiconductor, O‐pivaloylhydroxylammonium trifluoromethanesulfonate (PHAAT), is developed to manage carrier dynamics Sn‐PVSCs. The amphiphilic ionic modulators containing multiple Lewis‐base functional groups can synergistically passivate anionic cationic while coordinating with uncoordinated Sn 2+ compensate for surface charge alleviate oxidation. Especially, sulfonate anions raise energy barrier oxidation, relieve lattice distortion, inhibit passivating Sn‐related I‐related deep‐level defects. Furthermore, strong coupling between PHAAT induces transition electronic state from p‐type n‐type, thus creating an extra back‐surface field accelerate electron extraction. Consequently, PHAAT‐treated device exhibits champion efficiency 13.94% negligible hysteresis. without any encapsulation maintains 94.7% its initial PCE after 2000 h storage 91.6% 1000 illumination. This work provides reliable strategy construct p‐n homojunction realize efficient stable photovoltaic devices.

Language: Английский

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Intercepting the Chelation of Perovskites with Ambient Moisture through Active Addition Reaction for Full‐Air‐Processed Perovskite Solar Cells

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

Published: June 22, 2024

Abstract The fabrication of perovskite solar cells (PSCs) under full‐air conditions accelerates their scalable production and industrialization. However, ambient moisture interacts with perovskites during the film formation that disturbs crystallization triggers structural imperfections. Here, a formamidine (FA) active addition reaction (FAAR) strategy is devised to intercept deleterious chemical coordination. simultaneous incorporation 2, 6‐bis(aminomethyl)pyridine (BAMPy) molecule into tin oxide surface bulk ameliorates interface contact interior. It found tail amino group from BAMPy selectively reacts FA cation, occupying A site crystals, increasing binding energy H 2 O even in defective surface, thereby strengthening tolerance. This effectively modifies air, favors uniformity, forms compressive‐strained films. FAAR‐modified PSC devices fabricated deliver highest efficiencies 24.11% 21.68% aperture areas 0.06 1 cm , respectively. favorable impediment property contributes enhancement maintaining 90.8% initial performance for encapsulated after 2400 h storage accelerating damp‐heat measurements (85 °C 85% relative humidity).

Language: Английский

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The impact of CBz-PAI interlayer in various HTL-based flexible perovskite solar cells: A drift-diffusion numerical study

Heliyon, Journal Year: 2024, Volume and Issue: 10(10), P. e31138 - e31138

Published: May 1, 2024

In perovskite solar cells (PSCs), the charge carrier recombination obstacles mainly occur at ETL/perovskite and HTL/perovskite interfaces, which play a decisive role in cell performance. Therefore, this study aims to enhance flexible PSC (FPSC) efficiency by adding newly designed CBz-PAI-interlayer (simply CBz-PAI-IL) perovskite/HTL interface. addition, substantial work has been carried out on five different HTLs (Se/Te-Cu

Language: Английский

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Biomaterial Improves the Stability of Perovskite Solar Cells by Passivating Defects and Inhibiting Ion Migration

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 16(24), P. 31218 - 31227

Published: June 6, 2024

With the rapid improvement of power conversion efficiency (PCE), perovskite solar cells (PSCs) have broad application prospects and their industrialization will be next step. Nevertheless, performance long-term stability devices are limited by defect-induced nonradiative recombination centers ions' migration inside films. Here, usnic acid (UA), an easy-to-obtain efficient natural biomaterial with a hydroxyl functional group (−OH) four carbonyl groups (−C═O) was added to MAPbI3 precursor regulate crystallization process slowing rate, thereby expanding crystal size preparing films low defect density. In addition, UA anchors uncoordinated Pb2+ suppresses I-ions, which enhances film. Consequently, impressive PCE exceeding 20% achieved for inverted structure MAPbI3-based PSCs. More impressively, optimized PSCs maintained 78% initial under air high humidity (RH ≈ 65%, 25–30 °C) 1000 h. can extracted from plant, usnea, making it inexpensive easy obtain. Our work demonstrates plant material in industrialization, is significant nowadays.

Language: Английский

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Using Post‐Treatment Additives for Crystal Modulation and Interface Passivation Enables the Fabrication of Efficient and Stable Perovskite Solar Cells in Air

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

Published: Oct. 6, 2024

Abstract High‐performance perovskite solar cells (PSCs) fabricated in ambient air are considered inevitable for low‐cost commercial manufacturing. However, passivating film defects and controlling the crystallization process critical achieving high performance PSCs. This study proposes using novel 2D material MBene green antisolvent to simultaneously modulate passivation of perovskites. facilitates uncoordinated Pb 2+ ions, thereby enhancing formation energy vacancies within adjusting level structure. Moreover, increases nucleation sites perovskite, significantly extending crystal growth improving crystallinity, reducing non‐radiative recombination. Consequently, champion devices treated with achieve a power conversion efficiency (PCE) 24.22% when air, exhibit superior humidity long‐term stability. Furthermore, PSCs added significant stability under various environmental conditions, including heat. The results lay foundation development materials photovoltaics, revealing their mechanism as new type perovskites, providing insights industrially producing efficient stable cells.

Language: Английский

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An MBene Modulating the Buried SnO₂/Perovskite Interface in Perovskite Solar Cells

Angewandte Chemie, Journal Year: 2024, Volume and Issue: 136(27)

Published: April 18, 2024

Abstract The interface of perovskite solar cells (PSCs) plays an important role in transferring and collecting charges. Interface defects are factors affecting the efficiency stability PSCs. Here, buried between SnO 2 layer is bridged by two‐dimensional (2D) MBene, which improves charge transfer. MBene can deposit additional electrons on surface , passivate its facilitate collection. Moreover, dipole moment formed at increases electron transfer ability also regulates growth crystals, quality films, reduces grain boundary defects. As a result, PSCs based FA 0.2 MA 0.8 PbI 3 (FAPbI ) 0.95 (MAPbBr 0.05 get enhanced efficiencies 22.34 % 24.32 with negligible hysteresis. Furthermore, optimized device exhibits better stability. This work opens up application materials PSCs, reveals deeper understanding mechanism behind using 2D as modification layer, shows opportunities for potential material photoelectric devices.

Language: Английский

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Synergistic Passivation on Buried Interface for Highly Efficient and Stable p–i–n Perovskite Solar Cells

Small, Journal Year: 2024, Volume and Issue: unknown

Published: June 11, 2024

Abstract The properties of an interface at the hole transport layer (HTL)/perovskite are crucial for performance and stability perovskite solar cells (PVSCs), especially buried between HTL layer. Here, a molecular named potassium 1‐trifluoroboratomethylpiperidine (3FPIP) assistant‐modified bottom strategy is proposed to improve charge transfer capability balances energy level perovskite. BF 3 − in 3FPIP molecule interacts with undercoordinated Pb 2+ passivate iodine vacancies enhance PVSCs performance. Furthermore, infiltration K + ions into molecules enhances crystallinity Therefore, treatment exhibit champion 24.6%. More importantly, corresponding devices represent outstanding ambient stability, remaining 92% initial efficiency after 1200 h. This work provides new method engineering functional group synergy.

Language: Английский

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Understanding and Engineering the Perovskite/Organometallic Hole Transport Interface for High-Performance p–i–n Single Cells and Textured Tandem Solar Cells

ACS Energy Letters, Journal Year: 2024, Volume and Issue: 9(7), P. 3557 - 3566

Published: July 1, 2024

To address challenges in perovskite solar cells integrated with textured silicon, we developed a multilayer structured hole transport layer (HTL) on the basis of organometallic copper phthalocyanine (CuPc): N,N,N′,N′-tetra[(1,1′-biphenyl)-4-yl](1,1′:4′,1″-terphenyl)-4,4″-diamine (TaTm)/CuPc/Al2O3. Thermally evaporated CuPc provides stability and desired wettability for solution. We identified unique surface-bulk recombination pattern at CuPc/perovskite interface that results high fill factor (FF = 87%) but low open-circuit voltage (Voc) due to surface losses. TaTm enhances electron blocking, while Al2O3 forms porous insulator contact mitigates nonradiative recombination. Double-sided optimization effectively reduced without compromising carrier extraction efficiency. This HTL structure achieved PCE values 22.5% 24.5% 1.65 1.54 eV p–i–n single 28.9% silicon/perovskite tandem cells. The conformal wettable promotes uniform coating, thereby reducing issues, such as pyramid puncturing, Cz-Si wafers from production lines.

Language: Английский

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Pb/Sn-Based Perovskite Heterojunction for Hole Transport Layer-Free Carbon-Based Perovskite Solar Cells

ACS Energy Letters, Journal Year: 2024, Volume and Issue: 9(9), P. 4240 - 4247

Published: Aug. 2, 2024

The construction of heterojunctions has been proven to be effective in optimizing the interface energy structure and passivating defect states perovskite solar cells (PSCs). Tin (Sn)-based perovskites have demonstrated good hole extraction capability are promising candidates form with Pb-based facilitate charge transfer. Here, we propose a strategy for situ Pb/Sn-based by solution method. First, films an FAI-rich surface prepared. Subsequently, thin layer FA2SnI6 is formed SnI4 post-treatment, resulting heterojunction. formation heterojunction reduces also yields optimized interfacial level alignment, which facilitates carrier separation process nonradiative recombination loss. Finally, efficiency 19.89% achieved planar carbon-based without transport layer.

Language: Английский

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