Methods for preparing colloidal nanocrystal-based thin films
Methods of exchanging ligands to form colloidal nanocrystals (NCs) with chalcogenocyanate (xCN)-based ligands and apparatuses using the same are disclosed. The ligands may be exchanged by assembling NCs into a thin film and immersing the thin film in a solution containing xCN-based ligands. The ligands may also be exchanged by mixing a xCN-based solution with a dispersion of NCs, flocculating the mixture, centrifuging the mixture, discarding the supernatant, adding a solvent to the pellet, and dispersing the solvent and pellet to form dispersed NCs with exchanged xCN-ligands. The NCs with xCN-based ligands may be used to form thin film devices and/or other electronic, optoelectronic, and photonic devices. Devices comprising nanocrystal-based thin films and methods for forming such devices are also disclosed. These devices may be constructed by depositing NCs on to a substrate to form an NC thin film and then doping the thin film by evaporation and thermal diffusion.
- Research Organization:
- Univ. of Pennsylvania, Philadelphia, PA (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- SC0002158
- Assignee:
- The Trustees of the University of Pennsylvania (Philadelphia, PA)
- Patent Number(s):
- 9,336,919
- Application Number:
- 13/969,863
- OSTI ID:
- 1252203
- Resource Relation:
- Patent File Date: 2013 Aug 19
- Country of Publication:
- United States
- Language:
- English
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