We report combined effects of molecular doping and interfacial engineering on the performance of polymer:non-fullerene solar cells comprising PM6 as a donor and BTP-4Cl as an acceptor. Introduction of bis(pentafluorophenyl)zinc (Zn(C6F5)2) as a dopant in the photoactive blend results in the evolution of nanoscale domains and the increased photocurrent. Devices with an optimal concentration of the Zn(C6F5)2 is 0.1 wt
This study presents a flexible strain sensor fabricated by integrating programmable 3D-printed TPU scaffolds with a hierarchically engineered carbon black-polypyrrole (CB-PPy) hybrid conductive network. By using a process with swelling-assisted CB infiltration followed by vapor phase polymerization initiated by iron(III) p-toluene sulfonate, a conformal PPy coating was formed throughout the porous scaffold, resulting in a hierarchical conductive network constructed from direct contacts among CB particles and continuous PPy layers. We systematically investigate structure-network coupling by designing different scaffold structures with constant porosity (50
Chiral halide perovskites have emerged as promising material platforms for next-generation circularly polarized light-emitting diodes (CP-LEDs) and spin-LEDs owing to their high emission efficiency, tunable dimensionality, strong spin–orbit coupling, and structural and electronic chirality. However, achieving high electroluminescence efficiency while maintaining strong chiroptical responses remains challenging because of a trade-off between these properties. In this review, we discuss the fundamental mechanisms of chiral-induced spin selectivity, chirality transfer, spin-polarized electronic structures, and spin-selective optical transitions in two-dimensional (2D) and quasi-two-dimensional (quasi-2D) chiral perovskites, followed by recent strategies for mitigating the efficiency–chiroptical trade-off. We highlight two complementary approaches: intrinsic quasi-2D chiral emissive layers, where energy funneling and spin-polarized exciton transfer between different-dimensional phases contribute to emission, and extrinsic 2D chiral spin-injection layers, where spin-selective charge transport is separated from light emission. For quasi-2D emissive systems, phase distribution and energy-transfer pathways are key considerations for efficient energy funneling and chiroptical response. In spin-injection architectures, interfacial energy-level alignment, charge injection, and spin transport critically influence the generation of electroluminescence. We further discuss how organic ligand design and interfacial engineering influence these processes, providing perspectives for the development of efficient chiral perovskite-based light-emitting devices with strong circular polarization.
Organic photodetectors (OPDs) have emerged as promising alternatives to inorganic photodetectors because of their low-cost fabrication, lightweight, ease of processing, mechanical flexibility, and tailorable optical properties. Herein, a new donor polymer based on a naphtho[2,1-b:3,4-b’]dithiophene (NDT) backbone, which is a rigid, planar, symmetric, and electron-rich π-conjugated framework, was synthesized for green-selective OPDs. The polymer exhibited strong absorption at 535 nm and suitable optoelectronic properties for device fabrication. Bulk heterojunction OPDs were fabricated using PNDT and PCBM blend ratios of 1:1, 1:2, and 1:4, with different donor-to-acceptor weight ratios. Device performance strongly depended on the PNDT: PCBM blend ratio. Increasing the PCBM content enhanced photocurrent generation, whereas excessive PCBM also increased the reverse dark current. Consequently, the 1:1 blend exhibited the highest specific detectivity owing to its suppressed dark current with moderate photocurrent. These results highlight PNDT as a promising active material for high-performance green-selective organic photodetectors.
ZnSe/ZnTe Type-II hybrid interfaces were formed within honeycomb-patterned porous polymer films through a modified breath figure method under ambient conditions. The resulting hybrid films exhibited broadened visible-light absorption and markedly suppressed photoluminescence, indicating efficient interfacial charge separation. The hydrophobic porous framework further promoted the preferential localization of poorly water-soluble dye molecules, leading to enhanced visible-light photocatalytic degradation, particularly for alizarin. This simple fabrication strategy provides an effective platform for constructing immobilized hybrid semiconductor interfaces within porous polymer films. ZnSe/ZnTe Type-II hybrid interfaces were successfully immobilized within honeycomb-patterned porous polymer films by a modified breath figure method under ambient conditions. The hybrid-interface films exhibited broadened visible-light absorption and markedly suppressed photoluminescence, indicating enhanced interfacial charge separation. The hydrophobic porous framework further promoted preferential localization of poorly water-soluble dye molecules, resulting in significantly improved visible-light photocatalytic degradation, particularly toward alizarin.
