High-Sensitivity Remote Radiation Detection Enabled by CsPbBr3 Quantum-Dot-Doped Polymer–Silica Fiber with Core-Emitting and Cladding-Dominated Transmission
Experimental study demonstrates high-sensitivity remote radiation sensing using a quantum-dot-doped fiber, suggesting a low-cost platform for real-time monitoring.
Key Points
To develop a quantum-dot-doped polymer–silica fiber that overcomes cumulative reabsorption losses to enable sensitive, remote radiation detection.
Fabricated a CsPbBr3 quantum-dot-doped polymer-core/silica-cladding fiber (QPSF) under ambient conditions using capillary filling and in situ photopolymerization.
Evaluated optical propagation dynamics, UV response across 265–385 nm, transmission over a 20 m silica multimode fiber, and radioluminescence under X-ray irradiation compared with commercial scintillators.
Demonstrated core-emitting, cladding-dominated propagation that reduces reabsorption and scattering losses, achieving a peak UV sensitivity of 471 mV/(μW·cm–2) at 365 nm (a 26-fold increase over Ce/Tb co-doped fiber at 18 mV/(μW·cm–2)).
Achieved a linear X-ray dose-rate response with a detection limit of 51.39 nGy·s–1.
Generated radioluminescence output reaching 108.5% of a commercial plastic scintillating fiber and 206.6% of a Bi4Ge3O12 crystal rod.