The perovskite/electron transport layer interface plays a critical role in perovskite solar cell (PSC) performance and stability. Here, we report potassium bisaccharate (PB) acting as a multifunctional interfacial chemical bridge at the interface between the electron transport layer and the perovskite layer on introducing it into a buried interface. The carboxyl group at one end of the molecule is anchored to the hydroxy-rich SnO surface through covalent interactions, stabilizing its out-of-plane orientation, and the carboxyl group at the other end reduces non-radiative recombination by passivating the under-coordinated Pb in the perovskite. Sum-frequency generation (SFG) spectra confirm out-of-plane orientations and optimize energy level alignment. Carbon-based PSCs treated with PB achieve a champion PCE of 19.69% (active area: 0.04 cm) and retain 95.8% of their initial efficiency after 1200 h under ambient conditions. These results demonstrate PB as a promising buried interface modifier to enhance efficiency and long-term stability in carbon-based PSCs.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1039/d4nr04719b | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Regulating the Crystallization and Morphology of PbI Precursor Films for the Growth of High-Quality Perovskite Films via Vapor-Solid Reaction.
ACS Appl Mater Interfaces
March 2025
State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China.
Developing vapor-solid reaction methods to prepare organic-inorganic hybrid perovskite thin films is highly compatible with processes in crystalline silicon solar cells and the thin-film photovoltaic industries, facilitating rapid industrialization. In the vapor-solid reaction, the crystallization quality of perovskite thin films is widely influenced by the crystallinity and microstructure of lead iodide (PbI) precursor films. During the thermal evaporation process of preparing the PbI precursor films, we observed that PbI tends to develop a disordered surface morphology and exhibits high crystallinity, which significantly hinders the uniform diffusion of the organic amine salt vapor during the subsequent vapor-solid reaction.
View Article and Find Full Text PDFWe report the cosolvency effect of formamidinium lead triiodide (FAPbI) in a mixture of γ-butyrolactone (GBL) and 2-methoxyethanol (2ME), a phenomenon where FAPbI shows higher solubility in the solvent blend than in either alone. We found that FAPbI exhibits 10× higher solubility in 30% 2ME in GBL than in 2ME alone and 40% higher solubility than in GBL alone at 90 °C. This enhanced solubility is attributed to the disruption of the hydrogen bonding network within 2ME, allowing its hydroxyl and ether groups to interact more freely with the solute.
View Article and Find Full Text PDFCopper-Catalyzed -Heteroannulation of [60]Fullerene with Aryl Sulfonamides and Paraformaldehyde: Synthesis and Functionalization of [60]Fullerene-Fused Imidazolidines.
Org Lett
March 2025
Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule-Based Materials, and School of Chemistry and Materials Science, Anhui Normal University, Wuhu, Anhui 241002, People's Republic of China.
The Cu(II)-catalyzed -heteroannulation reaction of [60]fullerene (C) with aryl sulfonamides and paraformaldehyde has been disclosed for the synthesis of diverse C-fused imidazolidines, of which one or both of the ArSO moieties could be removed selectively. Further transformations into the unexpected bicyclic 1,2,3,4-adduct and C-fused imidazolidinium iodide salt have also been demonstrated. A plausible reaction mechanism is proposed on the basis of control experiments.
View Article and Find Full Text PDFMetal Organic Chemical Vapor Deposition of Hybrid Perovskites.
J Am Chem Soc
March 2025
Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290, United States.
Semiconductor devices often rely on high-purity materials and interfaces achieved through vapor- and vacuum-based fabrication methods, which can enable precise compositional control down to single atomic layers. Compared to groups IV and III-V semiconductors, hybrid perovskites (HPs) are an emergent class of semiconductor materials with remarkable solution processability and compositional variability that have facilitated rapid experimentation to achieve new properties and progress toward efficient devices, particularly for solar cells. Surprisingly, vapor deposition techniques for HPs are substantially less developed, despite the complementary benefits that have secured vapor methods as workhorse tools for semiconductor fabrication.
View Article and Find Full Text PDFResearch Advances in Ion Exchange of Halide Perovskites.
Nanomaterials (Basel)
February 2025
Institute of Polymer Optoelectronic Materials and Devices, Guangdong Basic Research Center of Excellence for Energy & Information Polymer Materials, State Key Laboratory of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregates, South China University of Technology, Guangzhou 510640, China.
In recent years, halide perovskite materials have been extensively studied by researchers due to their excellent optoelectronic characteristics. Unlike traditional semiconductors, halide perovskites possess unique ionic crystal structures, which makes it easier to perform facile composition engineering to tailor their physical and chemical properties. Ion exchange is a popular post-treatment strategy to achieve composition engineering in perovskites, and various ion exchange processes have been used to modify the structural and functional features of prefabricated perovskites to meet the requirements of desired applications.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!