Synthesis and Characterization of Large PbSe Colloidal Quantum Dots
Abstract
Large colloidal quantum dots of PbSe (first excitonic peak position >2 µm) are synthesized under different conditions of temperature, the concentration of precursors and their ratio, and concentration of oleic acid and diphenylphosphine. The dependence of the optical properties, grain size dispersity, and process yield on the processing conditions is systematically explored and discussed. The Ostwald ripening process and how it affects grain growth is demonstrated. Finally, the results for the dependence of the absorption wavelength on the grain diameter for large nanocrystals are compared to the relationships reported in the literature for smaller nanocrystals.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Apr 30, 2021
- Source ID
- 10.1002/ppsc.202000285
Entities
People
- Chengchangfeng Lu
- Eric Decuir Jr.
- Janet L. Jensen
- Priyalal S. Wijewarnasuriya
- Sudhir Trivedi
- Susanna M. Thon
- W. Pałosz
- Yan Cheng
Organizations
- Edgewood Chemical Biological Center
- Johns Hopkins University
- United States Army Research Laboratory