CsPbBr₃Perovskite Quantum Dots as Single Photon Sources

Cesium Lead Bromide (CsPbBr₃) Perovskites Quantum Dots (PQDs) are zero-dimensional semiconducting particles with tunable optical properties. We are interested in PQDs as possible single photon sources with applications in quantum computing and quantum cryptography. We have successfully fabricated CsPbBr₃ PQDs and measured their photoluminescence intensity as a function of wavelength. As temperature is varied from 77K to 293K, the central wavelength undergoes a blue-shift. The fabricated CsPbBr₃ PQDs are stable at 77K and 293K. Diluting the solution used in fabrication should allow us to create samples of individual, spatially-resolved quantum dots, which can then be verified with g⁽²⁾ measurements.