Interface Modification for Efficient and Stable Inverted Inorganic Perovskite Solar Cells

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(31)

Published: June 7, 2023

Due to their excellent thermal stability and ideal bandgap, metal halide inorganic perovskite based solar cells (PSCs) with inverted structure are considered as an choice for perovskite/silicon tandem cells. However, the power conversion efficiency (PCE) of still lags far behind that conventional n-i-p PSCs due interfacial energy level mismatch high nonradiative charge recombination. Herein, performance is significantly improved by engineering CsPbI3-x Brx films 2-mercapto-1-methylimidazole (MMI). It found mercapto group can preferably react undercoordinated Pb2+ from forming Pb-S bonds, which appreciably reduces surface trap density. Moreover, MMI modification results in a better alignment electron-transporting material, promoting carrier transfer reducing voltage deficit. The above combination open-circuit enhancement 120 mV, yielding champion PCE 20.6% 0.09 cm2 area 17.3% 1 area. Furthermore, ambient, operational heat stabilities also greatly improved. work demonstrates simple but effective approach fabricating highly efficient stable PSCs.

Language: Английский

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Inorganic Perovskite Surface Reconfiguration for Stable Inverted Solar Cells with 20.38% Efficiency and Its Application in Tandem Devices

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(28)

Published: April 13, 2023

Inorganic perovskite solar cells (IPSCs) have garnered attention in tandem (TSCs) due to their suitable bandgap and impressive thermal stability. However, the efficiency of inverted IPSCs has been limited by high trap density on top surface inorganic film. Herein, a method for fabricating efficient reconfiguring properties CsPbI2.85 Br0.15 film with 2-amino-5-bromobenzamide (ABA) is developed. This modification not only exhibits synergistic coordination carbonyl (C=O) amino (NH2 ) groups uncoordinated Pb2+ , but also Br fills halide vacancies suppresses formation Pb0 effectively passivating defective surface. As result, champion 20.38%, highest reported date achieved. Furthermore, successful fabrication p-i-n type monolithic perovskite/silicon TSCs an 25.31% first time demonstrated. Crucially, unencapsulated ABA-treated shows enhanced photostability, retaining 80.33% its initial after 270 h, stability (maintain 85.98% 300 h at 65 °C). The retains 92.59% 200 under continuous illumination ambient air.

Language: Английский

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Device Performance of Emerging Photovoltaic Materials (Version 4)

Advanced Energy Materials, Journal Year: 2023, Volume and Issue: 14(4)

Published: Dec. 15, 2023

Abstract Following the 3rd release of “Emerging PV reports” , best achievements in performance emerging photovoltaic (e‐PV) devices diverse e‐PV research subjects are summarized, as reported peer‐reviewed articles academic journals since August 2022. Updated graphs, tables, and analyses provided with several parameters, such power conversion efficiency, open‐circuit voltage, short‐circuit current density, fill factor, light utilization stability test energy yield. These parameters presented a function bandgap average visible transmittance for each technology application, put into perspective using, example, detailed balance efficiency limit. The 4th installment discusses “PV emergence” classification respect to generations” waves” highlights latest device progress multijunction flexible photovoltaics. Additionally, Dale‐Scarpulla's plots efficiency‐effort terms cumulative publication count also introduced.

Language: Английский

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Highly‐Stable CsPbI₃ Perovskite Solar Cells with an Efficiency of 21.11% via Fluorinated 4‐Amino‐Benzoate Cesium Bifacial Passivation

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 33(44)

Published: July 7, 2023

Abstract The poor interface quality between cesium lead triiodide (CsPbI 3 ) perovskite and the electron transport layer limits stability efficiency of CsPbI solar cells (PSCs). Herein, a 4‐amino‐2,3,5,6‐tetrafluorobenzoate (ATFC) is designed as bifacial defect passivator to tailor perovskite/TiO 2 interface. comprehensive experiments demonstrate that ATFC can not only optimize conductivity, mobility, energy band structure TiO by passivation undercoordinated Ti 4+ , oxygen vacancy ( V O ), free OH defects but also promote yield high‐quality film synergistic Pb 2+ with CO group F atom, limiting I − migration via F···I interaction. Benefiting from above interactions, ATFC‐modified device yields champion power conversion (PCE) 21.11% an excellent open‐circuit voltage OC 1.24 V. Meanwhile, optimized PSC maintains 92.74% its initial after aging 800 h in air atmosphere, has almost no attenuation tracking at maximum point for 350 h.

Language: Английский

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In Situ Surface Sulfidation of CsPbI₃ for Inverted Perovskite Solar Cells

ACS Energy Letters, Journal Year: 2024, Volume and Issue: 9(1), P. 329 - 335

Published: Jan. 3, 2024

Inverted CsPbI3 commonly exhibits a more p-type surface than bulk, which induces severe interfacial recombination and, thus, limits the device's Voc and efficiency in inverted perovskite solar cells (PSCs). Here, gradual CsPbI3/PbS heterojunction is constructed to inhibit such through situ chemical sulfidation with N,N′-diphenylthiourea (DPhTA). DPhTA can directly react form PbS induce p- n-type transition at surface, leads energy level bending downward establishing top of region. PSCs exhibit high 1.20 V reach over 20% (stabilized 19.5%), among highest efficiencies PSCs. In addition, strong Pb–S bond well-matched crystal lattice will protect stabilize layer beneath, thereby greatly improving stability. Resulting retain 95% initial whether after maximum power point (MPP) tracking for 1200 h or N2 storage 300 days.

Language: Английский

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All–Inorganic Perovskite Solar Cells: Defect Regulation and Emerging Applications in Extreme Environments

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(25)

Published: March 11, 2024

Abstract All–inorganic perovskite solar cells (PSCs), such as CsPbX 3 , have garnered considerable attention recently, they exhibit superior thermodynamic and optoelectronic stabilities compared to the organic–inorganic hybrid PSCs. However, power conversion efficiency (PCE) of PSCs is generally lower than that PSCs, contain higher defect densities at interface within light‐absorbing layers, resulting in non‐radiative recombination voltage loss. Consequently, regulation has been adopted an important strategy improve device performance stability. This review aims comprehensively summarize recent progresses on well their cutting‐edge applications extreme scenarios. The underlying fundamental mechanisms leading formation crystal structure are firstly discussed, overview literature‐adopted strategies context interface, internal, surface engineering provided. Cutting‐edge environments outer space underwater situations highlighted. Finally, a summary outlook presented future directions for achieving efficiencies stability

Language: Английский

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Perovskite solar cells: Fundamental aspects, stability challenges, and future prospects

Progress in Solid State Chemistry, Journal Year: 2024, Volume and Issue: unknown, P. 100463 - 100463

Published: May 1, 2024

Language: Английский

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Overcoming Phase Segregation in Wide‐Bandgap Perovskites: from Progress to Perspective

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

Published: May 25, 2024

Abstract Wide‐bandgap (WBG) perovskite solar cells (PSCs) are recognized as promising candidates for diversified photovoltaics (PVs), such tandem devices, indoor PVs, and semitransparent building‐integrated PVs. However, these WBG perovskites made from a mixed‐halides strategy suffer severe phase segregation under continuous illumination, leading to exacerbated non‐radiative recombination, consequently decreased open‐circuit voltage efficiency. In this review, the generation reversal processes of in meticulously introduced. Additionally, major characterization techniques presented. A detailed summary recent progress enhancing photostability PSCs through various strategies is provided. These primarily concentrate on composition regulation, crystallization modulation, inhibition ion migration, strain regulation. Finally, perspectives potential directions carefully discussed promote further development high‐efficiency photostable PSCs.

Language: Английский

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Powering the Future: Opportunities and Obstacles in Lead‐Halide Inorganic Perovskite Solar Cells

Advanced Science, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 3, 2025

Abstract Efficiency, stability, and cost are crucial considerations in the development of photovoltaic technology for commercialization. Perovskite solar cells (PSCs) a promising third‐generation due to their high efficiency low‐cost potential. However, stability organohalide perovskites remains significant challenge. Inorganic perovskites, based on CsPbX ₃ (X = Br − /I ), have garnered attention excellent thermal optoelectronic properties comparable those perovskites. Nevertheless, inorganic faces several hurdles, including need high‐temperature annealing achieve photoactive α‐phase susceptibility transitioning into nonphotoactive δ‐phase under environmental stressors, particularly moisture. These challenges impede creation high‐efficiency, high‐stability devices using low‐cost, scalable manufacturing processes. This review provides comprehensive background fundamental structural, physical, lead‐halide It discusses latest advancements fabricating PSCs at lower temperatures ambient conditions. Furthermore, it highlights progress state‐of‐the‐art devices, manufactured environments reduced temperatures, alongside simultaneous upscaling PSCs.

Language: Английский

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Intermediate Layer‐Assisted Trap Density Reduction in Low‐Power Optoelectronic Memristors for Multifunctional Systems

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

Published: Feb. 3, 2025

Abstract The rapid expansion of the Internet Things demands low‐power devices that integrate memory, sensors, and logic functions. Perovskite materials show promise for optoelectronic memristors; however, challenges such as nonuniform trap distribution uncontrolled filament formation hinder their resistive switching performance. To overcome these issues, a TiO 2 nanofilm via atomic layer deposition base formation, is introduced. This passivates interfacial defects by forming strong chemical interactions with Pb 2+ I − ions at perovskite interface, significantly reducing densities (interface density decreases 15‐fold to 3.0 × 10 16 cm −3 , bulk 1.8 14 ). Improved energy band alignment enables efficient electron transport, yielding low‐ V SET (+0.24 V) excellent (≈0.7 µW) nonvolatile memory Additionally, device reliably detects near‐infrared illumination an optical input reconfigurable image recognition using 5 array under combined stimuli. It also facilitates implementation complex gates, AND, OR, flip‐flops. paper demonstrates potential integrating sensing, functionalities into single through incorporation nanolayer.

Language: Английский

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