Emergent Above-Gap Photoluminescence in Molecularly Engineered Hybrid Bilayer Crystals

Bilayer crystals, built by stacking two-dimensional (2D) covalent monolayers, give rise to coupled excitonic states whose properties are constrained by fixed lattice symmetry and orientation. Replacing one covalent monolayer with a 2D molecular crystalheld together by noncovalent forcesovercomes t...

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Bibliographic Details
Main Author:	Tomojit Chowdhury (6285287) (author)
Other Authors:	Aurélie Champagne (15213726) (author), Patrick Knüppel (22676009) (author), Zehra Naqvi (20934322) (author), Ariana Ray (7651370) (author), Mengyu Gao (5545958) (author), David A. Muller (1568509) (author), Nathan P. Guisinger (1383159) (author), Kin Fai Mak (1901236) (author), Jeffrey B. Neaton (1262847) (author), Jiwoong Park (1661347) (author)
Published:	2025
Subjects:	Biophysics Cell Biology Biotechnology Ecology Computational Biology Astronomical and Space Sciences not elsewhere classified Chemical Sciences not elsewhere classified Physical Sciences not elsewhere classified strong polarization anisotropy perfectly linear power peak 120 mev directly growing single based bilayer platform atomically thin optoelectronic ab initio </ plane lattice geometry fixed lattice symmetry delocalized excitonic states fully quenches pl demonstrating molecular control 7 </ sup 2 </ sub gap emission  excitonic emission lattice scale gap emission excitonic phenomena ∼ 10 work introduces stacking two robust photoluminescence report four quantum materials ptcda monolayer powerful knob law dependence intermolecular spacing interlayer coupling give rise gap photoluminescence exciton engineering excitation density excellent agreement coexisting localized calculations reveal
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Emergent Above-Gap Photoluminescence in Molecularly Engineered Hybrid Bilayer Crystals

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