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Steering Energy Transfer Pathways through Mn-Doping in Perovskite Nanocrystals.
J Am Chem Soc
January 2025
Radiation Laboratory, University of Notre Dame, Notre Dame, Indiana 46556, United States.
Modulation of singlet and triplet energy transfer from excited semiconductor nanocrystals to attached dye molecules remains an important criterion for the design of light-harvesting assemblies. Whereas one can consider the selection of donor and acceptor with favorable energetics, spectral overlap, and kinetics of energy transfer as a means to direct the singlet and triplet energy transfer pathways, it is not obvious how to control the singlet and triplet characteristics of the donor semiconductor nanocrystal itself. By doping CsPb(ClBr) nanocrystals with Mn, we have now succeeded in increasing the triplet characteristics of semiconductor nanocrystals.
View Article and Find Full Text PDFThiophene Copolymer Donors Containing Ester-Substituted Thiazole for Organic Solar Cells.
ACS Appl Mater Interfaces
January 2025
MOE Key Laboratory of Macromolecular Synthesis and Functionalization, State Key Laboratory of Silicon and Advanced Semiconductor Materials, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, P. R. China.
Organic solar cells have seen significant progress in the past 2 decades with power conversion efficiencies (PCEs) exceeding 20% but mostly based on high-cost photovoltaic materials. Polythiophenes (PTs) without a fused-ring structure are good candidates as low-cost donor materials, deserving more attention for studying. In this work, ester-substituted thiazole (E-Tz) was explored as the electron-withdrawing unit to design PTs, and further optimization on the fluorinated/nonfluorinated donor segment contents via copolymerization strategy was simultaneously performed, yielding polymer donors of PTETz-100F, PTETz-80F, and PTETz-0F.
View Article and Find Full Text PDFComputational investigation of the perylene-TCNQ complex: effects of chalcogen and fluorine substitutions.
J Mol Model
January 2025
Department of Chemistry, Birla Institute of Technology and Science, Pilani - K. K. Birla Goa Campus, Zuarinagar, 403726, Goa, India.
Context: Donor-acceptor (D-A) complexes, formed between two or more molecules held together by intermolecular forces, show interesting tunable properties and found applications in diverse fields, including semiconductors, catalysis, and sensors. In this study, we investigated the D-A complexes formed between perylene and 7,7,8,8-tetracyanoquinodimethane (TCNQ) and their chalcogen (S, Se) and fluorine derivatives. It was observed that interaction energies due to complex formation increase while the HOMO-LUMO gaps decrease with chalcogen substitutions.
View Article and Find Full Text PDFBackbone Engineering of Bithiophene Imide Dimer-Based Polymeric Mixed Ionic-Electronic Conductors for High-Performance n-Type Organic Electrochemical Transistors.
Small
January 2025
Department of Materials Science and Engineering, Southern University of Science and Technology (SUSTech), Shenzhen, Guangdong, 518055, China.
Polymeric mixed ionic-electronic conductors (PMIECs) are gaining significant attention due to their potential applications in organic electrochemical transistors (OECTs). However, the performance of n-type OECTs still lags behind that of their p-type counterparts. Here, the structure-performance correlation of fused bithiophene imide dimer (BTI2)-based PMIECs is systematically investigated with the backbone evaluation from acceptor-strong donor (A-SD) to acceptor-donor (A-D), to acceptor-weak donor (A-WD), to acceptor-weak acceptor (A-WA), and finally to A-A structures.
View Article and Find Full Text PDFRational Design of Quinoidal Conjugated Polymers for Photothermal Antibacterial Therapy.
Macromol Rapid Commun
January 2025
School of Materials Science and Engineering, Hebei University of Technology, Tianjin, 300401, P. R. China.
The increasing prevalence of antibiotic resistance, driven by the overuse and misuse of conventional antibiotics, has become a critical public health concern. Photothermal antibacterial therapy (PTAT) utilizes heat generated by photothermal agents under light exposure to inhibit bacterial growth without inducing resistance, attracting more and more attention. Quinoid conjugated polymers, especially para-azaquinodimethane (AQM) polymer, are a class of organic semiconductors known for efficient π-electron delocalization, near-infrared absorption, and narrow bandgap, showing great potential in the application of photothermal reagents.
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