Publications by authors named "Yingchen Peng"
Article Synopsis
- * A bridging molecule, (2-aminoethyl)phosphonic acid (AEP), is used to enhance the SnO/perovskite interface, reducing surface carrier traps and improving the growth of the perovskite film.
- * This modification leads to a champion power conversion efficiency (PCE) of 26.40% and significantly improves the durability of unencapsulated PSCs, achieving around 1400 hours of operational life.
Article Synopsis
- Two different isomeric forms of indium bromide crystals, α and β, were created by altering cooling conditions during their synthesis.
- Structural differences reveal varied supramolecular interactions, supported by Hirshfeld surface analysis.
- The α form exhibits a significantly higher photoluminescence quantum yield due to its compact structure and effective electron transfer processes, offering insights for future design of luminescent indium-based materials.*
Recently zero-dimensional (0-D) inorganic-organic metal halides (IOMHs) have become a promising class of optoelectronic materials. Herein, we report a new photoluminescent (PL) 0-D antimony(III)-based IOMH single crystal, namely [HBPZ][SbCl]·HO (BPZ = benzylpiperazine). Photophysical characterizations indicate that [HBPZ][SbCl]·HO exhibits singlet/triplet dual-band emission.
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- Zero-dimensional organic-inorganic metal halides (OIMHs), particularly hybrid antimony(III) bromides (HABs), have potential for high photoluminescence quantum yields (PLQYs), but current values are lower compared to their chloride counterparts.* -
- Researchers developed a method to enhance PLQYs by synthesizing two structurally similar HABs with different solvent molecules, resulting in notable differences in their emission properties and PLQYs, specifically a nearly twofold increase in PLQY for one compound.* -
- The improvement in PLQY is linked to structural changes influenced by hydrogen bonding between the inorganic components and solvent molecules, underscoring the importance of structural rigidity in optimizing the phot
Article Synopsis
- The study focuses on the importance of radiocesium remediation for ecological safety, human health, and sustainable nuclear energy development.
- Researchers have developed a robust material, KInSnS (InSnS-1), which effectively captures cesium (Cs) from strongly acidic solutions, overcoming challenges related to material stability and competition from protons.
- The material not only has a high capacity for Cs adsorption but also serves in ion exchange processes; its selective adsorption mechanisms have been analyzed using single-crystal structure techniques.
Article Synopsis
- The compound [Cmim][Mim][SbCl] features dual cations and is the first to demonstrate deep-red emission in zero-dimensional organic-inorganic hybrid materials.
- The emission is attributed to significant anion distortion caused by imbalanced supramolecular interactions.
- This results in a remarkably large Stokes shift of 335 nm and a full width at half maximum (FWHM) of 210 nm in the emission spectrum.
Article Synopsis
- Zero-dimensional metal halides, particularly [EtPPh][SbCl], are gaining interest for their ability to switch luminescence, making them useful for sensors and anticounterfeiting.
- Research showed that only solvent molecules with a volume less than 22.3 Å can interact with [EtPPh][SbCl], influencing their photoluminescent properties.
- The study further revealed that solvent functional groups affect the hydrogen bonding strength with [SbCl], leading to changes in luminescent behavior and enhancing overall photoluminescence quantum yield to 95%.
Herein, a new mechanism, namely, crystalline phase recognition (CPR), is proposed for the single-crystal-to-single-crystal (SCSC) transition of metal halides. Chiral β-[Bmmim] SbCl (Bmmim=1-butyl-2,3-methylimidazolium) can recognize achiral α-[Bmmim] SbCl on the basis of a key-lock feature through intercontact of their single crystals, resulting in a domino phase transition (DPT). The concomitant photoluminescence (PL) switching enables observation of the DPT in situ.
View Article and Find Full Text PDFDiscrete supertetrahedral Tn chalcogenido clusters, which can be regarded as the smallest semiconductor quantum dots with precise chemical composition, have attracted considerable attention due to their outstanding photoluminescent, photoelectric, and photo/electrocatalytic properties. Such discrete molecular clusters are suitable for solution processing towards functional materials and can be used as precursors for constructing open-framework chalcogenides. Traditionally they were synthesized hydro(solvo)thermally with molecular solvents (e.
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