Rational Design and Visualization of Multifunctional Phenothiazine‐Based Self‐Assembled Monolayers for Better Interface Contact in High‐Efficiency and Stable Perovskite Solar Cells

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

Published: Feb. 2, 2025

Abstract Interfacial modification using self‐assembled monolayers (SAMs) is crucial for defect passivation and energy level alignment in perovskite solar cells (PSCs), yet scaling SAMs remains a challenge. Organic are often too thin large‐area homogeneous layers through spin‐coating their hydrophobic nature complicates solution‐based fabrication, hindering uniform film formation. This study introduces SAM based on phenothiazine core that involves synergistic co‐adsorption of hydrophilic phosphonic acid with unit use as hole transport layer p‐i‐n PSCs. The PTZ‐PA improves formation, alignment, extraction, achieving power conversion efficiency above 23.2%. It also maintains stable performance over 500 h under continuous illumination, indicating its potential durable increases surface energy, overcoming non‐wetting issues enabling the formation high‐quality films improved morphology crystallinity. group coordinates lead iodide perovskite, enhancing electronic charge transfer mechanical absorption, which facilitates effective p‐type charge‐selective contacts.

Language: Английский

Plasmon-enhanced exciton relocalization in quasi-2D perovskites for low-threshold room-temperature plasmonic lasing

Science Advances, Journal Year: 2025, Volume and Issue: 11(19)

Published: May 7, 2025

Room-temperature nanolasers are crucial for advancing optical communication and photonic quantum technologies due to their capability generate coherent light at a subwavelength scale. However, development is constrained by challenges such as insufficient gain, material instability, high lasing thresholds. By integrating quasi–two-dimensional (quasi-2D) perovskites with high- Q plasmonic nanostructures, we demonstrate stable, wavelength-tunable, single-mode laser operating room temperature. This device leverages unique exciton relocalization effect in quasi-2D Ruddlesden-Popper additives, substantially enhancing gain improving stability. When coupled waveguide-hybridized surface lattice resonance mode, the enhanced light-matter interaction facilitates notably low threshold of 0.9 millijoules per square centimeter. In addition, achieves robust performance extended operational stability (1.8 × 10 6 excitation pulses). These results provide scalable, low-cost, energy-efficient platform nanolasing, potential applications next-generation technologies, including detection ranging, sensing, communication, computation.

Language: Английский