Kim, JS Kim, EK Hwang, H Park, K Yoon, E Park, IW 2024-01-21T06:43:52Z 2024-01-21T06:43:52Z 2021-09-02 2004-07 0374-4884 https://pubs.kist.re.kr/handle/201004/137464 We have investigated the energy levels of InAs quantum dots (QDs) embedded in various barrier layers such as InP, InGaAs and GaAs by using deep level transient spectroscopy (DLTS) measurement. The apparent activation energy of 0.56 eV below the conduction band edge of barrier layers in the InAs/InP QD system was higher than 0.32 eV in the InAs/In0.53Ga0.47As QD system or 0,29 eV in the InAs/GaAs/In0.53Ga0.47As QD system, which was inserted in 10 mono-layers (MLs) GaAs between InAs QDs and the InGaAs barrier. The capture barrier heights of InAs QDs in the InAs/InP system was measured at more than about 0.18 eV, showing the existence of strain between QDs and barrier layers. The InAs/GaAs(10 MLs)/InGaAs system also showed about 0.12 eV capture barrier, but the InAs/InGaAs system has a very small barrier, This result might originate from the strain-relief effect due to InGaAs layers. English KOREAN PHYSICAL SOC LEVEL TRANSIENT SPECTROSCOPY PHOTOLUMINESCENCE Electrical characterization of InAs/InP self-assembled quantum dots with InGaAs strain-relief layers Article 1 JOURNAL OF THE KOREAN PHYSICAL SOCIETY, v.45, no.1, pp.170 - 174 JOURNAL OF THE KOREAN PHYSICAL SOCIETY 45 1 170 174 scie scopus kci 000222795800039 2-s2.0-4043049504 Physics, Multidisciplinary Physics Article; Proceedings Paper LEVEL TRANSIENT SPECTROSCOPY PHOTOLUMINESCENCE deep-level transient spectroscopy quantum clots energy level InAs/InP InAs/InGaAs emission and capture processes