Molecular Design of Hole-Collecting Materials for Co-Deposition Processed Perovskite Solar Cells: A Tripodal Triazatruxene Derivative with Carboxylic Acid Groups

Journal of the American Chemical Society, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 10, 2025

High-performance and cost-effective hole-collecting materials (HCMs) are indispensable for commercially viable perovskite solar cells (PSCs). Here, we report an anchorable HCM composed of a triazatruxene core connected with three alkyl carboxylic acid groups (3CATAT-C3). In contrast to the phosphonic acid-containing tripodal analog (3PATAT-C3), 3CATAT-C3 molecules can form hydrophilic monolayer on transparent conducting oxide surface, which is beneficial subsequent film deposition in traditional layer-by-layer fabrication process. More importantly, larger diffusion coefficient higher surface energy make suitable simplified, one-step co-deposition process was directly added as part precursor solution. predominantly located at bottom after spin-coating mixed solution, facilitating charge extraction. Devices fabricated by this method exhibit superior performance champion power conversion efficiency over 23%. The unencapsulated devices showed good operational stability (retaining 90% initial output 100 h), thermal durability 95% value heating 105 °C under air), excellent storage (showing no drop 8000 h). Based results time-of-flight secondary-ion mass spectroscopy (ToF-SIMS) order nuclear magnetic resonance (DOSY), elucidated effect anchoring HCMs PSCs well mechanism Our findings provide valuable insights molecular design multifunctional materials, further advancing cells.

Language: Английский

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Examining the contribution of charge transport layers to boost the performance over 26% in Sr₃PCl₃ absorber-based bifacial perovskite solar cells

RSC Advances, Journal Year: 2025, Volume and Issue: 15(10), P. 7663 - 7681

Published: Jan. 1, 2025

Strontium phosphorus chloride (Sr 3 PCl ) presents a promising option for photovoltaic (PV) applications due to its distinctive optical, electrical, and structural characteristics.

Language: Английский

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Evaporated organic–MoO₃ composite hole transport layers toward stable perovskite solar cells

EES solar., Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

The release and diffusion of corrosive iodine species limit perovskite solar cell (PSC) stability. An organic-MoO 3 composite hole transport layer (HTL) with enhanced thermal stability is devised to suppress improve PSC

Language: Английский

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Decoding the Role of Molecular Orientation in Conjugated Self‐Assembled Monolayers for High‐Performance Binary Organic Photovoltaics Approaching 20% Efficiency

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

Published: April 10, 2025

Abstract Molecular orientation stands as the quintessential hallmark of conjugated self‐assembled monolayers (SAMs), which have recently catalyzed noteworthy advancements in organic photovoltaics (OPVs). Nevertheless, an unambiguous understanding these directional arrangements and their impact on optoelectronic properties remains elusive. To address this issue, herein three SAMs with representative orientations, i.e., edge‐on (BCZ‐1), tilt‐on (4PACz) face‐on (BCZ‐2) are meticulously designed. These orientations been rigorously validated by sum frequency generation vibrational spectroscopy first‐principles calculations. Remarkably, unequivocal correlation between molecular device performance is discerned. Particularly, oriented BCZ‐1 exhibits largest dipole moment normal to electrode, accompanied a dense uniform coverage. features collectively contribute its strongest work function increment for ultra‐fast hole extraction minimum interfacial carrier recombination. As result, champion power conversion efficiency 19.93% achieved devices based D18:L8‐BO active layer, representing one highest values reported binary bulk heterojunction OPVs. Besides, shows great potential practical applications due superior up‐scalability enhanced shelf‐stability. Overall, offers in‐depth insights into behaviors SAMs, opening new avenues unlock

Language: Английский

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Mitigating voltage losses and strain in perovskite solar cells through precise microscopic arrangement of chemical monomers

Rare Metals, Journal Year: 2025, Volume and Issue: unknown

Published: May 8, 2025

Language: Английский

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