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Proceedings Paper

Colloidal quantum dots as optoelectronic elements
Author(s): Milana Vasudev; Takayuki Yamanaka; Ke Sun; Yang Li; Jianyong Yang; Dinakar Ramadurai; Michael A. Stroscio; Mitra Dutta
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Paper Abstract

Novel optoelectronic systems based on ensembles of semiconductor nanocrystals are addressed in this paper. Colloidal semiconductor quantum dots and related quantum-wire structures have been characterized optically; these optical measurements include those made on self-assembled monolayers of DNA molecules terminated on one end with a common substrate and on the other end with TiO2 quantum dots. The electronic properties of these structures are modeled and compared with experiment. The characterization and application of ensembles of colloidal quantum dots with molecular interconnects are considered. The chemically-directed assembly of ensembles of colloidal quantum dots with biomolecular interconnects is demonstrated with quantum dot densities in excess of 10+17 cm-3. A number of novel photodetectors have been designed based on the combined use of double-barrier quantum-well injectors, colloidal quantum dots, and conductive polymers. Optoelectronic devices including photodetectors and solar cells based on threedimensional ensembles of quantum dots are considered along with underlying phenomena such as miniband formation and the robustness of minibands to displacements of quantum dots in the ensemble.

Paper Details

Date Published: 2 February 2007
PDF: 12 pages
Proc. SPIE 6479, Quantum Sensing and Nanophotonic Devices IV, 64790I (2 February 2007); doi: 10.1117/12.710738
Show Author Affiliations
Milana Vasudev, Univ. of Illinois at Chicago (United States)
Takayuki Yamanaka, Univ. of Illinois at Chicago (United States)
Ke Sun, Univ. of Illinois at Chicago (United States)
Yang Li, Univ. of Illinois at Chicago (United States)
Jianyong Yang, Univ. of Illinois at Chicago (United States)
Dinakar Ramadurai, Univ. of Illinois at Chicago (United States)
Michael A. Stroscio, Univ. of Illinois at Chicago (United States)
Mitra Dutta, Univ. of Illinois at Chicago (United States)


Published in SPIE Proceedings Vol. 6479:
Quantum Sensing and Nanophotonic Devices IV
Manijeh Razeghi; Gail J. Brown, Editor(s)

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