Danhof, J.J.DanhofVierheilig, C.C.VierheiligSchwarz, U.T.U.T.SchwarzMeyer, T.T.MeyerPeter, M.M.PeterHahn, B.B.Hahn2022-03-042022-03-042011https://publica.fraunhofer.de/handle/publica/22485710.1002/pssb.201046108For an InGaN/GaN multiquantum well sample with low threading dislocation density (TDD), temperature-dependent microphotoluminescence measurements were performed. Evaluation of the behavior of the photoluminescence peak energy leads to the conclusion that even at a length scale of about 500?nm we still see the same S-shape of the temperature-dependent energy shift that was observed on a far larger scale. The behavior of the temperature-dependent full width at half maximum of the spectra and the integrated intensity leads to similar conclusions. We therefore demonstrate that the phenomenon responsible for the S-shape acts on a length scale that is far smaller than 500?nm. In addition, the behavior of the integrated intensity shows a fluctuation of local point defect density in the analyzed sample with its low TDD.enInGaNquantum wellsphotoluminescence667530journal article