Birefringent Color Filter by Layered Metal‐Organic Chalcogenides: In‐Plane Anisotropy and Odd/Even Effect
Year: 2024
Type: article
Abstract: Anisotropic 2D materials are gaining interest recently as building blocks for angular‐dependent optical/electrical devices. However, the fundamental understanding of their structure‐property‐relationship is limited, which hinders further modulation of their unique characteristics via structure tailoring. Here the in‐plane structural anisotropy and the tunable optical/electrical properties of a series of radiation‐sensitive (X‐ray, e‐beam) metal‐organic chalcogenide (MOC) single crystals are comprehensively revealed with ligands of variable length/parity. Their monoclinic crystallography is determined at atomic resolution by a simple method that couples X‐ray/electron diffraction with first‐principles calculations. The in‐plane inorganic backbone of the MOCs exhibits a strong lattice anisotropy with odd/even alternations, which originates from that of the out‐of‐plane organic motifs via organic/inorganic accommodation. Such structural anisotropy is implied mechanically by the preferred orientation of crystal cleavage. It triggers a maximum ≈8 × distinction of in‐plane electrical conductivity of the semiconducting MOCs, plus a distinct birefringence (maximum Δn ≈ 0.03) with a dispersive orientation of dielectric axes, which rotate up to 25.7° from UV to visible‐light regime, inspiring an emerging pathway for color filtering via single crystal rotation. Such in‐plane optical characteristics also exhibit odd/even alternation and can be flexibly tuned by the designable out‐of‐plane ligands.
Source: Advanced Optical Materials
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $4,650
Funders: National Science Foundation, U.S. Department of Energy, National Centre for Supercomputing Applications, University of Illinois at Urbana-Champaign, Office of Science, Materials Research Science and Engineering Center, Harvard University, Division of Materials Research, Argonne National Laboratory, Brookhaven National Laboratory, H2020 European Research Council
Awards: G102163711, G1066799600, G107546177, G1092154682, G1126863173, G1313983767, G132563423, G1336448005, Leadership Class Scientific and Engineering Computing: Breaking Through the Limits, G1572106353, G1664757510, G1787303299, G2287611682, G2353174811, G2415155667, G262962599, MRSEC: Illinois Materials Research Center, G2952167421, G3075337988, Two-Dimensional Layered Materials: Thermodynamic and Electrical Studies, G338944111, G3589692066, G3599778289, Local Atomic-level Thermodynamic Probe for Nanoscience of 2D Membranes: Synthesis, NMR and Nanocalorimetry Study, G4810716312, G481480320, Sustained-Petascale In Action: Blue Waters Enabling Transformative Science And Engineering, G498139845, G5127309730, G513797252, G5164439164, G518378155, G5281039208, G5292656900, G5367696895, G5535608740, G5606180237, G5737679380, G5968602007, G6457648290, G6848031779, G6918803902, G7337948867, G8324313409, G969889393, G993149817
OpenAlex ID: W4405822506