Microstructure and luminescence dynamics of ZnCdO films with high Cd content deposited on different substrates by DC magnetron sputtering method

Abstract

Investigation of Cd behavior in the ZnCdO alloys, where Cd content exceeds the solubility limit, is of importance due to possible impurity segregation and second phases' formation in this material. We have studied the Cd behavior in the Zn1-xCdxO films deposited by dc magnetron sputtering on different substrates: c-plane Al2O3, bare Si (1 0 0) and Au (45 nm)/Si (1 0 0). It is revealed that Cd content of 10 at. % in the target results in average 6-8 at. % of Cd in the films, depending on the substrate type. Structural analysis based on X-ray diffraction revealed the absence of Cd-related secondary phases. Time-resolved photoluminescence (TRPL) and high-resolution energy dispersive X-ray analysis (EDX) help to understand the recombination dynamics of spontaneous emission and to establish correlations between cadmium content and radiative lifetime. We have revealed that the internal quantum efficiency is influenced by the Cd content and defect concentration. It is suggested that increasing of the cadmium content results in the reduction of nonradiative recombination centers originating from point defects

Chemically Prepared Cu-Rich CuSbSe2Nanocrystals for Solar Cells and Thermoelectric Power Applications

“…This character can be useful for thin film solar cell applications in which it enhances the required light scattering, light trapping inside the devices. 12 The HR-TEM image of CuSbSe 2 ink is demonstrated in Fig. 5.…”

Features of technological synthesis and properties of ZnO-Cd based materials for photocatalytic applications. Review

“…To date, several research articles have been published on the synthesis of the ZnO-Cd system using a variety of deposition methods, such as pulsed laser deposition (PLD) [5,15,16,17,18,19], electrodeposition [20,21,22], hydrothermal synthesis [21,20], sol-gel process [11,12,22,20,21,22,23,24], direct current [13,14,25] and radiofrequency magnetron deposition [27,28], spray pyrolysis (SP) [3,22,26,27,28,29], thermal co-evaporation [22,36], molecular beam epitaxy (MBE) [2,5,36], remote plasma-enhanced metalorganic chemical vapor deposition (RPE-MOCVD) [5,37,38], ion layering (SILAR) [34,39], spin-coating [4,40] and even reflux method [42] (Fig. 1, 2).…”

Cd-composition induced effects on structure, optical and electrical properties of sputtered Zn1−xCdxO films

“…x Cd x O thin films such as sol-gel [15,16], spray pyrolysis [17,18], chemical bath deposition [19], metal organic chemical vapor deposition (MOCVD) [20], electrodeposition [21], molecular beam epitaxy (MBE) [22,23], magnetron sputtering [24,25]. In comparison, among many growth techniques, the magnetron sputtering has some distinctive advantages, for example, it is cost-effective for the growth of ZnO films with different dopant sources on various substrates.…”