International Conference Physics.SPb/2025
Nanophotonics

Photoluminescence of PbS quantum dots in an inorganic glass matrix excited by leds: spectra and quantum efficiency

A. V. Aladov^a, A. L. Zakhgeim^a, A. E. Ivanov^a, A. A. Onushchenko^b, A. E. Chernyakov^a, M. Z. Shvarts<sup>c

a</sup> Submicron Heterostructures for Microelectronics Research and Engineering Center, Russian Academy of Sciences, St. Petersburg
^b S. I. Vavilov State Optical Institute,
^c Ioffe Institute, St. Petersburg

Abstract: The luminescent properties of lead sulfide quantum dots grown in a multicomponent silicate glass matrix have been studied to assess the potential of such nanostructured materials for creating broadband near-infrared emitters. In the radiation spectrum of the studied sample, an intense photoluminescence band is observed with a maximum at a wavelength of $\lambda$ = 1170 nm and a width at half the height of $\Delta\lambda_{0.5}$ = 170 nm. The quantum yield of photoluminescence when excited in the blue region of the spectrum was at least 20%, which can be considered sufficient for competitive near-infrared radiation sources.

Keywords: PbS, quantum dots, glass matrix, photoluminescence, quantum efficiency.

Received: 29.04.2025
Revised: 10.09.2025
Accepted: 24.10.2025

DOI: 10.61011/OS.2025.10.61948.7931-25