A Novel Self‐Assembled Hole‐Transporting Monolayer with Extending Conjugation for Inverted Perovskite Solar Cells

Small, Journal Year: 2025, Volume and Issue: unknown

Published: March 22, 2025

Abstract The application of self‐assembled monolayers (SAMs) as hole‐transporting materials has greatly improved the performance inverted perovskite solar cells. Structure engineering SAMs proven to be an effective approach enhance device performance. In this work, a novel SAM featuring extended conjugation is designed and synthesized, designated E‐CbzBT. Compared with CbzBT, E‐CbzBT exhibits enhanced asymmetric noncoplanar screw‐shaped configuration, leading uniform tight packing on ITO. increases wettability precursor solution substrate, thereby facilitating crystallinity suppressing interfacial trap density more effectively than CbzBT. Accordingly, PSCs employing reach champion power conversion efficiency 25.15%, surpassing 24.06% for CbzBT‐based devices. Importantly, E‐CbzBT‐based demonstrate superior ambient thermal stability. extending in represents promising avenue further advancements cell technology.

Language: Английский

Optimized Self‐Assembled Monolayer Coverage using Molybdenum Trioxide‐Modified Indium Tin Oxide for High‐Performance Organic Solar Cells

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

Published: April 4, 2025

Abstract Self‐assembled monolayers (SAMs) have recently emerged as promising candidates for interfacial materials in organic photovoltaics (OPVs). However, the quality and integrity of SAM growth are significantly influenced by surface morphology indium tin oxide (ITO) substrates, which can compromise performance reproducibility OPVs. To achieve controlled high‐quality SAMs assembly, this study presents an effective strategy to eliminate sensitivity polycrystalline ITO depositing amorphous molybdenum trioxide (MoO 3 ) thin layer on top. The application MoO homogenize roughness circumvent issues related preferential grain orientation distinct boundaries associated with ITO. This results a more uniform denser coverage compared direct bare Consequently, resulting OPVs based PM6/BTP‐eC9 system exhibit outstanding power conversion efficiency 19.9% (certified at 19.3%), primarily due reduced defects optimized active morphology. More importantly, introduction between enhances long‐term stability devices those solely SAMs. progress highlights importance refining microstructure facilitate favorable formation subsequently construct high‐performance

Language: Английский

Nonvolatile Solid Additive with a Simple Structure for Nonfullerene Organic Solar Cells

Solar RRL, Journal Year: 2025, Volume and Issue: unknown

Published: May 9, 2025

In organic solar cells (OSCs), precise control over the bulk heterojunction (BHJ) morphology is critical for optimizing device performance. A widely adopted strategy regulating BHJ involves incorporation of small amounts additives. However, employing volatile solid additives necessitates volatilization control, which remains challenging. While nonvolatile with high boiling points have been explored, most exhibit large and structurally complex architectures, raising concerns regarding their role in OSCs potential impact on charge transport. Thus, a additive both point simple molecular structure highly desirable. this study, 4‐bromobiphenyl (BBP), chemical structure, was incorporated into to modulate morphology. The addition BBP enhanced donor–acceptor miscibility, suppressed excessive aggregation, promoted uniform improved crystallinity. Consequently, power conversion efficiency significantly increased 18.11%, surpassing that incorporating while also enhancing long‐term stability. This work provides promising achieving stable improving OSC performance through

Language: Английский