Co‐Self‐Assembled Monolayers Modified NiO_x for Stable Inverted Perovskite Solar Cells

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(16)

Published: Jan. 11, 2024

Abstract [4‐(3,6‐dimethyl‐9H‐carbazol‐9yl)butyl]phosphonic acid (Me‐4PACz) self‐assembled molecules (SAM) are an effective method to solve the problem of buried interface NiO x in inverted perovskite solar cells (PSCs). However, Me‐4PACz end group (carbazole core) cannot forcefully passivate defects at bottom film. Here, a Co‐SAM strategy is employed modify PSCs. doped with phosphorylcholine chloride (PC) form improve monolayer coverage and reduce leakage current. The phosphate ions (Cl − ) PC can inhibit surface defects. Meantime, quaternary ammonium Cl fill organic cations halogen vacancies film enable passivation. Moreover, promote growth crystals, collaboratively defects, suppress nonradiative recombination, accelerate carrier transmission, relieve residual stress Consequently, modified devices show power conversion efficiencies as high 25.09% well excellent device stability 93% initial efficiency after 1000 h operation under one‐sun illumination. This work demonstrates novel approach for enhancing performance PSCs by modifying on .

Language: Английский

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Phosphonate Diacid Molecule Induced Crystallization Manipulation and Defect Passivation for High‐Performance Inverted MA‐Free Perovskite Solar Cells

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

Published: June 18, 2024

Abstract Inverted perovskite solar cells (PSCs) comprising formamidinium‐cesium (FA‐Cs) lead triiodide have garnered considerable attention due to their impressive efficiency and remarkable stability. Nevertheless, synthesizing high‐quality FA‐Cs alloyed films presents challenges, primarily attributable the intricate interphase process involved absence of methylammonium (MA + ) mixed halogens. Here, additive 3‐phosphonopropanoic acid (3‐PPA) is introduced, with bifunctional phosphonic groups, into precursor modulate crystal growth provide passivation at grain boundaries. In situ characterization reveals that 3‐PPA can form a “rapid nucleation, slow growth” mechanism, resulting in enlarged grains enhanced crystallinity. addition, serves passivate boundary defects release residual strain by forming molecular bridging, leading passivated achieving fluorescence lifetime 5.79 microseconds favorable n‐type contact interface. As result, devices incorporating achieve champion power conversion (PCE) 24.05% an ultra‐high fill factor (FF) 84.22%. More importantly, optimized exhibit satisfactory stability under various testing conditions. The findings underscore pivotal role multifunctional additives crystallization control defect for high‐performance MA‐free pure iodine PSCs.

Language: Английский

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Synergistic Crystallization Kinetics Modulation and Deep/Shallow Level Defect Passivation via an Organometallic Cobaltocenium Salt Toward High‐Performance Inverted Perovskite Solar Cells

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: 14(8)

Published: Jan. 9, 2024

Abstract Numerous deep/shallow level defects generated at the surface/grain boundaries of perovskite during uncontrollable crystallization pose a formidable challenge to photovoltaic performance solar cells (PSCs). Herein, an organometallic cobaltocenium salt additive, 1‐propanol‐2‐(1,2,3‐triazol‐4‐yl) hexafluorophosphate (PTCoPF 6 ), is incorporated into precursor solution regulate and minimize holistic for high‐performance inverted PSCs. The cations PF − in PTCoPF stabilize Pb‐I framework repair shallow‐level positively negatively charged vacancies perovskite. N═N triazole ring can passivate deep‐level uncoordinated lead. interaction between materials delays nucleation crystal growth, ensuring high‐quality with large grains, suppressing non‐radiative recombination ion migration. Therefore, ‐incorporated PSC achieves impressive power conversion efficiency 25.03% outstanding long‐term stability. Unencapsulated encapsulated PSCs maintain 93% 95% their initial efficiencies under 85 °C storage nitrogen atmosphere 1000 h maximum point tracking nearly h, respectively. Synergistic kinetic modulation defect passivation ionized metal‐organic complex additives will become prevalent methods improve stability

Language: Английский

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Cross‐layer all‐interface defect passivation with pre‐buried additive toward efficient all‐inorganic perovskite solar cells

Carbon Energy, Journal Year: 2024, Volume and Issue: 6(9)

Published: April 12, 2024

Abstract The buried interface in the perovskite solar cell (PSC) has been regarded as a breakthrough to boost power conversion efficiency and stability. However, comprehensive manipulation of terms transport layer, interlayer, layer largely overlooked. Herein, we propose use volatile heterocyclic compound called 2‐thiopheneacetic acid (TPA) pre‐buried additive achieve cross‐layer all‐interface defect passivation through an situ bottom‐up infiltration diffusion strategy. TPA not only suppresses serious interfacial nonradiative recombination losses by precisely healing underlying defects but also effectively enhances quality film releases residual strain film. Owing this versatility, TPA‐tailored CsPbBr 3 PSCs deliver record 11.23% with enhanced long‐term This manipulating using opens new avenues for further improving performance reliability PSC.

Language: Английский

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Cross-linking polymerization boosts the performance of perovskite solar cells: from material design to performance regulation

Energy & Environmental Science, Journal Year: 2023, Volume and Issue: 16(10), P. 4251 - 4279

Published: Jan. 1, 2023

This paper reviews the performance modulation of perovskite solar cells by cross-linking polymerization with different molecular structures from points grain boundaries, lattice interior, and charge transport layers.

Language: Английский

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Fluorinated Polyimide Tunneling Layer for Efficient and Stable Perovskite Photovoltaics

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(21)

Published: March 26, 2024

Abstract Despite the remarkable progress of perovskite solar cells (PSCs), challenges remain in terms finding effective and viable strategies to enhance their long‐term stability while maintaining high efficiency. In this study, a new insulating hydrophobic fluorinated polyimide (FPI: 6FDA‐6FAPB) was used as interface layer between hole transport (HTL) PSCs. The functional groups FPI play pivotal role passivating defects within device. Due its work function, demonstrates field‐effect passivation (FEP) capabilities an layer, effectively mitigating non‐radiative recombination at interface. Notably, does not impede carrier transmission interface, which is attributed presence tunneling effects. optimized PSCs achieve outstanding power conversion efficiency (PCE) 24.61 % demonstrate excellent stability, showcasing efficacy enhancing device performance reliability.

Language: Английский

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Enhancing Hole Transport Uniformity for Efficient Inverted Perovskite Solar Cells through Optimizing Buried Interface Contacts and Suppressing Interface Recombination

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(52)

Published: Aug. 28, 2024

Abstract [4‐(3,6‐dimethyl‐9H‐carbazol‐9yl)butyl]phosphonic acid (Me‐4PACz) self‐assembly material has been recognized as a highly effective approach for mitigating nickel oxide (NiO x ) surface‐related challenges in inverted perovskite solar cells (IPSCs). However, its uneven film generation and failure to effectively passivate the buried interface defects limit device‘s performance improvement potential. Herein, p‐xylylenediphosphonic (p‐XPA) containing bilateral phosphate groups (−PO 3 H 2 is introduced an layer between NiO /Me‐4PACz layer. P‐XPA can flatten surface of hole transport optimize contact. Meanwhile, p‐XPA achieves better energy level alignment promotes interfacial transport. In addition, −PO chelate with Pb 2+ form hydrogen bond FA + (formamidinium cation), thereby suppressing non‐radiative recombination loss. Consequently, IPSC modification champion power conversion efficiency 25.87 % (certified at 25.45 %) laboratory scale (0.0448 cm ). The encapsulated target device exhibits operational stability. Even after 1100 hours maximum point tracking 50 °C, remains impressive 82.7 initial efficiency. Molecules featuring passivation contact inhibit recombination, providing enhancing stability devices.

Language: Английский

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Surface passivation by multifunctional carbon dots toward highly efficient and stable inverted perovskite solar cells

Journal of Energy Chemistry, Journal Year: 2023, Volume and Issue: 86, P. 9 - 15

Published: July 11, 2023

Language: Английский

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In situ polymerization of water‐induced 1,3‐phenylene diisocyanate for enhanced efficiency and stability of inverted perovskite solar cells

Interdisciplinary materials, Journal Year: 2024, Volume and Issue: 3(2), P. 316 - 325

Published: Feb. 20, 2024

Abstract In the realm of photovoltaics, organometallic hybridized perovskite solar cells (PSCs) stand out as promising contenders for achieving high‐efficiency photoelectric conversion, owing to their remarkable performance attributes. Nevertheless, defects within layer, especially at grain boundaries and surface, have a substantial impact on both overall long‐term operational stability PSCs. To mitigate this challenge, we propose method water‐induced condensation polymerization small molecules involving incorporation 1,3‐phenylene diisocyanate (1,3‐PDI) into film using an antisolvent technique. Subsequent step, introduction water triggers [P(1,3‐PDI)], thereby facilitating in situ passivation uncoordinated lead inherent film. This process demonstrates notable enhancement efficiency approach has led attainment noteworthy power conversion (PCE) 24.66% inverted Furthermore, based P(1,3‐PDI) modification, these devices maintain 90.15% initial after 5000 h storage under ambient conditions 25°C 50 ± 5% relative humidity. Additionally, even maximum point tracking 1000 h, PSCs modified with sustain 82.05% PCE. Small can rationally manipulate turn harm benefit, providing new directions methods improving

Language: Английский

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Buried Interface Engineering‐Assisted Defects Control and Crystallization Manipulation Enables Stable Perovskite Solar Cells with Efficiency Exceeding 25%

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

Published: Oct. 10, 2024

Abstract The presence of various defects within the electron transport layer (ETL), perovskite (PVK) layer, and their interfaces significantly affects efficiency, hysteresis, stability solar cells (PSCs) in n–i–p structure. Herein, a defect passivation strategy employing potassium 4‐methoxysalicylate (MSAK) is utilized to efficiently modulate ETL, PVK, ETL/PVK interface. functional groups −COO− −OH MSAK molecules, along with K + cations, effectively reduce tin oxide (SnO 2 ) improve properties. Importantly, MSAK‐SnO provides favorable substrate for growth highly crystallization dense layers. molecules also passivate bottom interface PVK by coordinating under‐coordinated Pb 2+ ions. Furthermore, cations can migrate into further enhancing improving photovoltaic performance PSC devices. PSCs fabricated using based on achieve remarkable power conversion efficiency (PCE) 25.47%, alongside reduced hysteresis enhanced stability. After being stored under ambient conditions 60 days, device maintains nearly 90% its initial PCE, whereas PCE pristine decreases 69.7% after aging.

Language: Английский

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