Published July 13, 2015
| Version v1
Journal article
Temperature dependence of the fundamental excitonic resonance in lead-salt quantum dots
- 1. Max-Born-Institut für Nichtlineare Optik und Kurzzeitspektroskopie, Max-Born-Str. 2A, 12489 Berlin (Germany)
- 2. Key Laboratory of Polar Materials and Devices, Ministry of Education, East China Normal University, 500 Dongchuan Rd, Shanghai 200241 (China)
- 3. Institut für Angewandte Photonik e.V. Rudower Chaussee 29/31, 12489 Berlin (Germany)
- 4. Instituto de Ciencias Físicas, Universidad Nacional Autónoma de México, Cuernavaca, Morelos 62210, Mexico and Ullrich Photoincs LLC, Wayne, Ohio 43466 (United States)
- 5. National Laboratory for Infrared Physics, Shanghai Institute of Technical Physics, 500 Yutian Rd, Shanghai 200083 (China)
Description
The temperature dependences of the fundamental excitonic resonance in PbS and PbSe quantum dots fabricated by various technologies are experimentally determined. Above ∼150 K, sub-linearities of the temperature shifts and halfwidths are observed. This behavior is analyzed within the existing standard models. Concordant modeling, however, becomes possible only within the frame of a three-level system that takes into account both bright and dark excitonic states as well as phonon-assisted carrier redistribution between these states. Our results show that luminescence characterization of lead-salt quantum dots necessarily requires both low temperatures and excitation densities in order to provide reliable ensemble parameters
Additional details
Identifiers
- DOI
- 10.1063/1.4926806;
Publishing Information
- Journal Title
- Applied Physics Letters
- Journal Volume
- 107
- Journal Issue
- 2
- Journal Page Range
- p. 022106-022106.5
- ISSN
- 0003-6951
- CODEN
- APPLAB
INIS
- Country of Publication
- United States
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 47053162
- Subject category
- S71: CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS;
- Descriptors DEI
- CARRIERS; DENSITY; EXCITATION; LEAD SELENIDES; LEAD SULFIDES; LUMINESCENCE; PHONONS; QUANTUM DOTS; RESONANCE; SALTS; SIMULATION; TEMPERATURE DEPENDENCE; TEMPERATURE RANGE 0065-0273 K
- Descriptors DEC
- CHALCOGENIDES; EMISSION; ENERGY-LEVEL TRANSITIONS; LEAD COMPOUNDS; NANOSTRUCTURES; PHOTON EMISSION; PHYSICAL PROPERTIES; QUASI PARTICLES; SELENIDES; SELENIUM COMPOUNDS; SULFIDES; SULFUR COMPOUNDS; TEMPERATURE RANGE
Optional Information
- Notes
- (c) 2015 AIP Publishing LLC