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Size- and Composition-Dependent Energy Transfer from Charge Transporting Materials to ZnCuInS Quantum Dots
- Source :
- The Journal of Physical Chemistry C. 116:11973-11979
- Publication Year :
- 2012
- Publisher :
- American Chemical Society (ACS), 2012.
-
Abstract
- We studied the energy transfer processes from organic charge transporting materials (CTMs) to ZnCuInS (ZCIS) quantum dots (QDs) with different emission wavelength by steady-state and time-resolved photoluminescence (PL) spectroscopy. The change in the PL excitation intensity of the ZCIS QDs and the PL decay time of the CTMs clearly demonstrated an efficient energy transfer process in the ZCIS/CTM blend films. It was found that the efficiency of Forster resonance energy transfer significantly increases with increasing the particle size and decreasing the Zn content in the QDs, which is well consistent with the estimated Forster radii (R0) varying from 3 to 5 nm. In addition, the PL quenching of the QDs related to the charge separation process was also observed in some of the samples. The energy transfer and charge separation processes in the films were well explained based on the band alignment between the ZCIS QDs and CTMs.
- Subjects :
- Photoluminescence
Chemistry
business.industry
Charge (physics)
Surfaces, Coatings and Films
Electronic, Optical and Magnetic Materials
Wavelength
General Energy
Förster resonance energy transfer
Quantum dot
Chemical physics
Optoelectronics
Particle size
Physical and Theoretical Chemistry
Spectroscopy
business
Excitation
Subjects
Details
- ISSN :
- 19327455 and 19327447
- Volume :
- 116
- Database :
- OpenAIRE
- Journal :
- The Journal of Physical Chemistry C
- Accession number :
- edsair.doi...........8f3675525cabb58501a8a614ba1e41e9
- Full Text :
- https://doi.org/10.1021/jp3037236