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Optical absorption and reflectivity spectra of highly chromium doped CdTe alloy and layer

100%
Potera P., Stefaniuk I., Kuzma M., Virt I., Pukowska B.
Open Physics
|
2009
|
vol. 7
|
issue 2
299-303
EN
In the present work, a CdTe alloy doped with a relatively high concentration of chromium (1%), and a CdTe:Cr layer, have been studied. Absorption and reflectivity spectra were measured at room temperature. They indicate the presence of chromium in the divalent state, both in the alloy and in the layer.
2
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Structural and optical properties of layers of pentacene formed by PLD method

86%
Potera P., Sagan P., Virt I., Kuzma M., Wisz G., Rudyj I., Frugynski M.
Open Physics
|
2008
|
vol. 6
|
issue 4
765-770
EN
Organic films fabrication offers the possibility of producing electronic devices of low weight, mechanical flexibility and low cost. One suitable material for organic film fabrigation which is the subject of the great interest is pentacene, because it is characterized by the large carrier mobility (∼1 cm2/Vs). In this work, the growth of pentacene layers using pulse laser deposition (PLD) on different substrates (glass/ITO, Si) is described and various processing parameters are investigated. Two pulsed YAG:Nd3+ laser wavelengths were used for the ablation of the PLD target: the first harmonic at 1064 nm aGn:dNdth3+e second at 532 nm. The structure of the layers formed was examined using SEM and RHEED methods. The results were compared with results of optical spectroscopy studies. It will be shown that layers deposed using second harmonics have a higher quality than those for first harmonic. The other PLD parametersalso have a strong influence on the structure quality of layers.
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