A‐D‐A‐type Molecule with Dual Functions of Efficient Charge Extraction and Trap Passivation for n‐i‐p Perovskite Solar Cells

Advanced Functional Materials, Год журнала: 2024, Номер 35(2)

Опубликована: Сен. 9, 2024

Abstract Interfacial defects and energy level mismatches between the perovskite 2,2′,7,7′‐tetrakis[N,N‐di(4‐methoxyphenyl)amino]‐9,9′‐spirobifluorene (Spiro‐OMeTAD) layers heavily hinder charge transfer, limiting efficiency stability of n‐i‐p solar cells (PSCs). Herein, D‐type TPA, D‐A‐type TPA‐CN, A‐D‐A‐type DTPA‐CN with triphenylamine units different interfacial dipoles are designed as multifunctional for PSCs. Among three molecules, has largest dipole moment, hole transporting capability, hydrophobicity, therefore strongest passivation best carrier extraction can be observed. As a result, DTPA‐CN‐treated device achieves champion power conversion (PCE) 25.00%, compared to control (22.78%). Moreover, long‐term unencapsulated is significantly improved. After 2,040 h storage in nitrogen glove box, maintains over 90% its initial efficiency, while only 61% device. The work indicates that simultaneous improvement trap critical achieving highly efficient stable

Язык: Английский

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Dipole Moment Modulation of Terminal Groups Enables Asymmetric Acceptors Featuring Medium Bandgap for Efficient and Stable Ternary Organic Solar Cells

Angewandte Chemie, Год журнала: 2024, Номер 137(3)

Опубликована: Сен. 9, 2024

Abstract This study puts forth a novel terminal group design to develop medium‐band gap Y‐series acceptors beyond conventional side‐chain engineering. We focused on the strategical integration of an electron‐donating methoxy and electron‐withdrawing halogen atom at benzene‐fused groups. combination precisely modulated dipole moment electron density groups, effectively attenuating intramolecular charge transfer effect, widening band acceptors. The incorporation these groups yielded two asymmetric acceptors, named BTP‐2FClO BTP‐2FBrO, both which exhibited open‐circuit voltage ( V oc ) as high 0.96 in binary devices, representing highest OC s among small molecule More importantly, BTP‐2FBrO exhibit modest aggregation behaviors molecular crystallinity, making them suitable third component mitigate excess PM6 : BTP‐eC9 blend optimize devices’ morphology. As result, optimized BTP‐2FClO‐based ternary organic solar cells (OSCs) achieved remarkable power conversion efficiency (PCE) 19.34 %, positioning it highest‐performing OSCs. Our highlights importance manipulating moments developing offers highly efficient for high‐performance

Язык: Английский

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Piezoelectric Biopolymers: Advancements in Energy Harvesting and Biomedical Applications

Polymers, Год журнала: 2024, Номер 16(23), С. 3314 - 3314

Опубликована: Ноя. 27, 2024

Biodegradable piezoelectric polymers have emerged as a hot research focus in bioelectronics, energy-harvesting systems, and biomedical applications, well sustainable future development. Biopolymers possess plenty of features which make them promising candidates for next-generation electronic technologies, including biocompatibility, degradability, flexibility. This review discusses biopolymers, focusing on the relationship between coupling mechanisms, material structures, performance. Processing techniques such annealing, mechanical drawing, poling are introduced further studied terms achieving high work reviews strategies enhancing properties via molecular engineering, nano structuring, incorporation additives. Furthermore, applications these biopolymers energy harvesting biomedicine provided, with discussion their potential degradable bioelectronic devices. There still challenges optimizing performance ensuring stability. Our is expected to provide an understanding help achieve wider application biopolymers.

Язык: Английский

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Electron Transporting Polymeric Materials with Partial Quaternization for High‐Performance Organic Solar Cells

Macromolecular Rapid Communications, Год журнала: 2024, Номер 45(22)

Опубликована: Авг. 9, 2024

Efficient cathode interfacial layers (CILs) have become a crucial component of organic solar cells (OSCs). Charge extraction barriers, trap states, and significant transport resistance may be induced due to the unfavorable interlayer, limiting device performance. In this study, poly(4-vinylpyridine) is used as CIL for OSCs, new type named P4VP-I synthesized through quaternization strategy. Compared P4VP, exhibits enhanced conductivity optimized work function. OSCs employing ETL demonstrate prolonged carrier lifetime, suppressed charge recombination, achieve higher power conversion efficiencies (PCE) than commonly ETLs such PFN-Br Phen-NaDPO.

Язык: Английский

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Rational designing of environmentally affable novel hole transporting materials through synergetic engineering of end-capped acceptors

Materials chemistry and physics., Год журнала: 2024, Номер unknown, С. 100001 - 100001

Опубликована: Окт. 1, 2024

Язык: Английский

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