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Energy efficiency of near infrared cobalt luminscence in ZnSe:Co determined by a photoacoustic method

Chrobak Ł., Maliński M., Strzałkowski K., Zakrzewski Z.

Opto-Electronics Review

2012

Vol. 20, No. 1

91-95

The paper presents results of computations of the energy efficiency of the cobalt luminescence in ZnSe:Co determined by the photoacoustic method. The transmission spectra, photoacoustic experimental and theoretical spectra, and the frequency dependence on the photoacoustic amplitude characteristics are presented. From them, the energy efficiency of Co²⁺ the near infrared luminescence (3200 nm) was computed in the frame of new proposed photoacoustic model of computations of the luminescence energy efficiency.

Photoacoustic method of determination of quantum efficiency of luminescence in Mn²⁺ ions in Zn₁₋xBexMnySe crystals

Maliński M., Chrobak Ł., Zakrzewski J., Strzałkowski K.

Opto-Electronics Review

2011

Vol. 19, No. 2

183-188

This paper presents step by step the procedure of determination of the quantum efficiency of luminescence of Mn²⁺ ions in the Zn₁₋xBexMnySe crystals. The method is based on the photoacoustic spectroscopy approach. In the paper, the experimental spectra of absorbance, transmission, absorption and photoacoustic spectra of the samples are presented and analyzed from the point of view of the possibility of determination of the quantum efficiency of Mn²⁺ ion luminescence at room temperature. It was determined experimentally that in the investigated crystals the quantum efficiency of luminescence in the Mn²⁺ ions is about 35%, 40%, 32% for the absorption peaks at 430 nm, 470 nm, and 510 nm, respectively, for Zn₀.₇₅Be₀.₂Mn₀.₀₅Se crystal.