Photoluminescence of PbS quantum dots in an inorganic glass matrix excited by LEDs: spectra and quantum efficiency
Aladov A. V. 1, Zakgeim A. L.1, Ivanov A. E.
1, Onushenko A. A.2, Chernyakov A. E.1, Shwarz M. Z.3
1Submicron Heterostructures for Microelectronics, Research and Engineering Center, Russian Academy of Sciences, St. Petersburg, Russia
2Joint Stock Company «Research and Production Corporation S.I. Vavilova», St. Petersburg, Russia
3Ioffe Institute, St. Petersburg, Russia
Email: aaladov@mail.ioffe.ru, zakgeim@mail.ioffe.ru, a-e-ivano-v@yandex.ru, alarkon@mail.ru, chernyakov.anton@yandex.ru, shvarts@scell.ioffe.ru
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 λ=1170 nm and a width at half the height of Δλ0.5=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.
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