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Orientation-selective spin-polarized edge states in monolayer NiI.
Nat Commun
December 2024
Institute of Physics, Chinese Academy of Sciences, Beijing, China.
Spin-polarized edge states in two-dimensional materials hold promise for spintronics and quantum computing applications. Constructing stable edge states by tailoring two-dimensional semiconductor materials with bulk-boundary correspondence is a feasible approach. Recently layered NiI is suggested as a two-dimensional type-II multiferroic semiconductor with intrinsic spiral spin ordering and chirality-induced electric polarization.
View Article and Find Full Text PDFMulti-Functional Semiconductor Polymer Doped Wide Bandgap Layer for All-Perovskite Solar Cells with High Efficiency and Long Durability.
Small
December 2024
Beijing Key Laboratory for Magneto-Photoelectrical Composite and Interface Science, School of Mathematics and Physics, University of Science and Technology Beijing, Beijing, 100083, P. R. China.
The study presents a multi-functional and semiconductor polymer poly[bis(3-hexylthiophen-2-yl)thieno[3,4-c]pyrrole-4,6-dione] (PBDTTPD) doping strategy that significantly enhanced the performance of the two-terminal all-perovskite tandem perovskite solar cells (T-PSCs). An optimized power conversion efficiency (PCE) of 26.87% has been achieved.
View Article and Find Full Text PDFProbing Out-Of-Plane Charge Transport in Organic Semiconductors Using Conductive Atomic Force Microscopy.
Adv Mater
December 2024
Cavendish Laboratory, University of Cambridge, JJ Thomson Avenue, Cambridge, CB3 0HE, UK.
High contact resistance remains the primary obstacle that hinders further advancements of organic semiconductors (OSCs) in electronic circuits. While significant effort has been directed toward lowering the energy barrier at OSC/metal contact interfaces, approaches toward reducing another major contributor to overall contact resistance - the bulk resistance - have been limited to minimizing the thickness of OSC films. However, the out-of-plane conductivity of OSCs, a critical aspect of bulk resistance, has largely remained unaddressed.
View Article and Find Full Text PDFOptimally Miscible Polymer Bulk-Heterojunction-Particles for Nonsurfactant Photocatalytic Hydrogen Evolution.
J Am Chem Soc
December 2024
Department of Chemical Engineering, National Tsing Hua University, Hsinchu 300044, Taiwan.
Mini-emulsion and nanoprecipitation techniques relied on large amounts of surfactants, and unresolved miscibility issues of heterojunction materials limited their efficiency and applicability in the past. Through our molecular design and developed surfactant-free precipitation method, we successfully fabricated the best miscible bulk-heterojunction-particles (BHJP) ever achieved, using donor () and acceptor () polymers. The structural similarity ensures optimal miscibility, as supported by the interaction parameter of the / blend is positioned very close to the binodal curve.
View Article and Find Full Text PDFOrganic semiconductor bulk heterojunctions for solar-to-chemical conversion: recent advances and challenges.
Nanoscale
December 2024
Department of Materials Science and Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea.
Solar fuel production involving the conversion of solar energy directly into chemical fuels such as hydrogen and valuable chemicals using photoelectrochemical (PEC) cells and photocatalysts (PCs) offers a promising avenue for sustainable energy while reducing carbon emissions. However, existing PEC cells and PCs fall short of economic viability due to their low solar-to-chemical (STC) conversion efficiency associated with the employed semiconductors, highlighting the clear need for identifying ideal semiconductor materials. Organic semiconductors (OSs), π-conjugated carbon-based materials, have emerged as promising candidates for enhancing STC conversion efficiency due to their remarkable optoelectrical properties, which can be readily adjustable through molecular engineering.
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