This article is cited in 4 papers

Adsorption of Ba atoms influences the composition, emission, and optical properties of CdS single crystals

B. E. Umirzakov^a, J. Sh. Sodikjanov^b, D. A. Tashmukhamedova^a, A. A. Abduvaitov^a, E. M. Rabbimov<sup>c

a</sup> Tashkent State Technical University named after Islam Karimov
^b Institute of Ion-Plasma and Laser Technologies, Uzbekistan Academy of Sciences, Tashkent
^c Djizak Polytechnical Institute

Abstract: The composition, emission and optical properties of CdS single crystals with a Ba surface film with a thickness of 0.5 to 5 monolayers have been studied. It was found that with an increase in $\Theta$ to 1 monolayer, the depth of the exit zone for true secondary electrons (and photoelectrons) $\lambda$ significantly increases, which is explained by a decrease in the work function. With a further increase in $\Theta$, the values of $\lambda$ and the intensity of the photocurrent decrease. It is shown that at room temperature there is no noticeable interdiffusion of atoms at the Ba–CdS interface. After heating at $T$ = 700 K, intense diffusion of S occurs into the Ba film and a compound of the Ba$_2$S type is formed.

Keywords: electron exit zone, adsorption, profiles distribution of atoms, emission efficiency, work functions.

Received: 25.11.2020
Revised: 26.02.2020
Accepted: 02.03.2020

DOI: 10.21883/PJTF.2021.12.51057.18632

 English version: Technical Physics Letters, 2021, 47:8, 620–623