Variations of the characteristics of Sb-surfactant assisted grown InGaAsN/GaAs single quantum wells (QWs) in dependence on QW growth temperature (T-GR = 442-505 degrees C) are investigated by the photoluminescence (PL) and high-resolution X-ray diffraction (HRXRD) methods. The QWs grown at similar to 480 degrees C demonstrated optimal PL characteristics, namely the highest PL intensity and small potential fluctuations. A good quality of heterointerfaces is proved by HRXRD. These structures emit at similar to 1.29 mu m at 300 K and are promising for application in long wavelength opto-electronic devices. The good structural properties of these QWs are assigned to Sb surfactant effect that allows shifting of the T-GR to higher temperatures without significant alloy decomposition. The increase of T-GR in its turn results in the decrease of the density of nonradiative defects that are the specific feature of low temperature growth. (c) 2005 Elsevier B.V. All rights reserved.