Optical gain and high quantum efficiency of matrix-free, closely packed CdSe quantum dots
- 13 October 1997
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 71 (15) , 2181-2183
- https://doi.org/10.1063/1.119374
Abstract
Solid films of matrix-free, closely packed CdSe nanocrystals have been prepared and surface stabilized. An efficient suppression of nonradiative recombination channels is achieved. The absolute quantum efficiency has been determined spectrally resolved using an integrating sphere, and values between 1% and 10% are obtained in dependence on temperature. Spectrally broad optical gain has been found with the maximum around 510 nm.Keywords
This publication has 15 references indexed in Scilit:
- Photoluminescence quantum efficiency and dynamics in ZnSe1−xTex and CdS1−xSex mixed crystalsJournal of Luminescence, 1997
- Electronic states and optical gain in strained CdS/ZnS quantum structuresPhysical Review B, 1997
- Long-range resonance transfer of electronic excitations in close-packed CdSe quantum-dot solidsPhysical Review B, 1996
- Exchange interaction and phonon confinement in CdSe quantum dotsPhysical Review B, 1996
- Femtosecond optical gain in strongly confined quantum dotsOptics Letters, 1996
- Gain processes in CdSe quantum dotsJournal of Crystal Growth, 1996
- Electrochromic and Photoelectrochromic Behavior of Thin WO3 Films Prepared from Quantum Size Collodal ParticlesLangmuir, 1994
- Strong optical nonlinearities and laser emission of semiconductor microcrystalsSolid State Communications, 1992
- Semiconductor clusters in the sol-gel process: quantized aggregation, gelation, and crystal growth in concentrated zinc oxide colloidsJournal of the American Chemical Society, 1991
- Three-dimensional quantum-size effect in chemically deposited cadmium selenide filmsPhysical Review B, 1987