- 标题
- 摘要
- 关键词
- 实验方案
- 产品
-
Synergistic Coassembly of Highly Wettable and Uniform Hole‐Extraction Monolayers for Scaling‐up Perovskite Solar Cells
摘要： All organic charge-transporting layer (CTL)-featured perovskite solar cells (PSCs) exhibit distinct advantages, but their scaling-up remains a great challenge because the organic CTLs underneath the perovskite are too thin to achieve large-area homogeneous layers by spin-coating, and their hydrophobic nature further hinders the solution-based fabrication of perovskite layer. Here, an unprecedented anchoring-based coassembly (ACA) strategy is reported that involves a synergistic coadsorption of a hydrophilic ammonium salt CA-Br with hole-transporting triphenylamine derivatives to acquire scalable and wettable organic hole-extraction monolayers for p–i–n structured PSCs. The ACA route not only enables ultrathin organic CTLs with high uniformity but also eliminates the nonwetting problem to facilitate large-area perovskite films with 100% coverage. Moreover, incorporation of CA-Br in the ACA strategy can distinctly guarantee a high quality of electronic connection via the cations’ vacancy passivation. Consequently, a high power-conversion-efficiency (PCE) of 17.49% is achieved for p–i–n structured PSCs (1.02 cm2), and a module with an aperture area of 36 cm2 shows PCE of 12.67%, one of the best scaling-up results among all-organic CTL-based PSCs. This work demonstrates that the ACA strategy can be a promising route to large-area uniform interfacial layers as well as scaling-up of perovskite solar cells.
关键词： hole-extraction monolayer,perovskite solar cells,scaling-up,modules,anchoring-based coassembly strategy
更新于2025-09-12 10:27:22
-
Electrostatic Interaction Mediates the Formation of Vesicular Structures from Coassembly of PS- <i>b</i> -PAA with Quantum Dots
摘要： Vesicular structures of block copolymers and inorganic nanoparticles with good stability have potential applications in therapeutic drug release and bioimaging. Herein, a block copolymer of polystyrene-b-poly(acrylic acid) (PS48-b-PAA67) and water-soluble AgInS2/ZnS core/shell quantum dots (QDs) capped with gelatin and thioglycolic acid were coassembled in tetrahydrofuran by adding water. The positively charged QDs bind to negatively charged PAA segments through electrostatic interaction. Numerous vesicular structures, such as uniform bilayer vesicles, ?owerlike large compound vesicles, onionlike lamellar structures consisting of alternating PS and PAA&QD layers, and multilamellar vesicles with spaces between concentric vesicle layers were obtained from the coassembly of PS48-b-PAA67 with QDs. The binding of the positively charged QDs to the PAA block in?uenced both the intra-aggregate PAA corona conformation and the interaggregate interactions. The key parameters a?ecting the formation of these vesicular structures included the QD content, solution pH, and water addition rate. Thus, tunable vesicular structures can be prepared and regulated through this simple but e?ective coassembly method.
关键词： electrostatic interaction,vesicular structures,quantum dots,coassembly,block copolymers
更新于2025-09-11 14:15:04
-
Achieving Amorphous Ultralong Room Temperature Phosphorescence by Coassembling Planar Small Organic Molecules with Polyvinyl Alcohol
摘要： Development of novel strategies for achieving amorphous ultralong organic phosphorescence (UOP) at room temperature is highly desired. Herein, a simple approach is reported by coassembling small organic molecules with polyvinyl alcohol (PVA) to afford amorphous UOP. These small organic molecules with planar conformation present quenched triplet state emission in an excessive stacking solid state. When coassembling these molecules with PVA, their planar structures are well confined in coassembly films. Such a confined environment leads to restricted molecular rotation and vibration, permitting these molecules to show stable triplet state and generate UOP. In control studies, corresponding structurally distorted molecules are also coassembled with PVA. However, they exhibit very weak or quenched UOP, since distorted structures with molecular rotation and vibration could easily dissipate the excitation energy in dilute film state. By employing this polymer confinement strategy, multicomponent luminescence dyes are further coassembled with PVA for multicolor luminescence displays, providing multicolor, uniform, and flexible luminescence films. This work demonstrates a general strategy of employing small organic molecules to coassemble with PVA to obtain amorphous UOP, which greatly expands the scope of organic molecules for developing simple but useful UOP films.
关键词： ultralong organic phosphorescence,distorted molecules,coassembly,planar molecules,flexible luminescence films
更新于2025-09-09 09:28:46