Organic Light?Emitting Physically Unclonable Functions

The development of novel physically unclonable functions (PUFs) is growing interest and fluorescent organic semiconductors (f-OSCs) offer unique advantages structural versatility, solution-processability, ease processing, great tuning ability their physicochemical/optoelectronic/spectroscopic properties. design ambient atmosphere facile fabrication a light-emitting function (OLE-PUF) based on green-emissive oligo(p-phenyleneethynylene) molecule reported. OLE-PUFs have been prepared by one-step, brief (5 min) thermal annealing spin-coated nanoscopic films (?40 nm) at modest temperature (170 °C), which results in efficient surface dewetting to form randomly positioned/sized hemispherical features with bright fluorescence. random positioning molecular domains generated the excellent uniformity (0.50), uniqueness (0.49), randomness (p > 0.01); whereas distinctive photophysical properties created additional security layers (fluorescence profile, excited-state decay dynamics, Raman mapping/spectrum, infrared spectrum) for multiplex encoding. substrates varying chemical structures, energies flexibility, direct deposition goods via drop-casting are demonstrated. immersed water, exposed mechanical abrasion, read-out repeatedly fluorescence imaging showed stability. These findings clearly demonstrate that rationally engineered solution-processable f-OSCs potential become key player new-generation PUFs.