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An experimental study of the photoconductivity time decay in InGaAs/GaAs quantum dot chain structures is reported. Different photoconductivity relaxations resulting from spectrally selecting photoexcitation of InGaAs QWR or QDs as well as GaAs spacers were measured. The photoconductivity relaxation after excitation of 650 nm follows a stretched exponent with decay constant dependent on morphology...
The influence of lithium doping on the crystallization behavior, morphology, and enhancement in photoluminescence intensity of SnO 2 :Eu was investigated. In order to attain high homogeneous and pure samples, the Pechini type sol–gel method was adopted for the synthesis at low temperature (500°C). The structure and morphology were characterized by using X-ray diffraction (XRD) and transmission...
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