Thermal escape and carrier dynamics in multilayer CdTe/ZnTe quantum dots
- Resource Type
- Authors
- J.C. Choi; Hong Seok Lee; Sung Hwan Jin; Minh Tan Man; Su Hwan Kim
- Source
- Journal of Alloys and Compounds. 735:2119-2122
- Subject
- 010302 applied physics
Photoluminescence
Materials science
Atmospheric escape
business.industry
Phonon
Mechanical Engineering
Metals and Alloys
02 engineering and technology
021001 nanoscience & nanotechnology
01 natural sciences
Cadmium telluride photovoltaics
Blueshift
Condensed Matter::Materials Science
Stack (abstract data type)
Mechanics of Materials
Quantum dot
0103 physical sciences
Materials Chemistry
Optoelectronics
0210 nano-technology
business
Spectroscopy
- Language
- ISSN
- 0925-8388
We present an optical spectroscopy study of multilayer CdTe/ZnTe quantum dots by photoluminescence (PL) and time-resolved PL. We demonstrate that the PL blueshift and enhanced PL intensity were due to an increase in the material intermixing and the density of the emitting states. An integrated PL as a function of temperature revealed that the separated energy of two different states was 4.5–6.2 meV and was nearly independent of the stack period. The main thermal escape was assisted by multi-longitudinal optical phonons at high temperature with activation energies in the range 48–54 meV.