Semiconductor Nanocrystals
- 1 August 1995
- journal article
- Published by Springer Science and Business Media LLC in MRS Bulletin
- Vol. 20 (8), 23-32
- https://doi.org/10.1557/s0883769400045073
Abstract
The following is an edited transcript of the presentation given by A. Paul Alivisatos, recipient of the Outstanding Young Investigator Award, at the 1995 MRS Spring Meeting in San Francisco.The work I will describe on semiconductor nanocrystals started with the realization that it is possible to precipitate a semiconductor out of an organic liquid. We can precipitate out a semiconductor as a colloid—a very small-sized semiconductor with reduced dimensionality—that will show large, quantum size effects. A dream at that time was to make an electronic material by such a process in a liquid beaker, by starting with an organic fluid and somehow injecting something into the fluid to make very small particles, which we could use in electronics. The materials we use in electronics today have perfect crystalline order. We are able to put in dopants very specifically, or control precisely their arrangements in space in enormously complicated ways. The level of purity of electronic materials is so high that making an electronic material in a wet chemistry approach seems almost impossible. If, in addition, we specify that the size must be controlled precisely, we recognize the project is a problem for basic research, yet not one ready for applications. Many fundamental problems arise if we try to make semiconductor particles, in a liquid, of such high quality that they can be used as electronic materials.Keywords
This publication has 13 references indexed in Scilit:
- Electronic Spectroscopy and Photophysics of Si Nanocrystals: Relationship to Bulk c-Si and Porous SiJournal of the American Chemical Society, 1995
- Comparison of Quantum Confinement Effects on the Electronic Absorption Spectra of Direct and Indirect Gap Semiconductor NanocrystalsPhysical Review Letters, 1994
- Quantum-dot quantum well CdS/HgS/CdS: Theory and experimentPhysical Review B, 1994
- X-ray Photoelectron Spectroscopy of CdSe Nanocrystals with Applications to Studies of the Nanocrystal SurfaceThe Journal of Physical Chemistry, 1994
- Synthesis and characterization of nearly monodisperse CdE (E = sulfur, selenium, tellurium) semiconductor nanocrystallitesJournal of the American Chemical Society, 1993
- Crystal Structure and Optical Properties of Cd 32 S 14 (SC 6 H 5 ) 36 . DMF 4 , a Cluster with a 15 Angstrom CdS CoreScience, 1993
- Electronic states of semiconductor clusters: Homogeneous and inhomogeneous broadening of the optical spectrumThe Journal of Chemical Physics, 1988
- Excited electronic states and optical spectra of ZnS and CdS crystallites in the ≊15 to 50 Å size range: Evolution from molecular to bulk semiconducting propertiesThe Journal of Chemical Physics, 1985
- Photo‐Chemistry of Colloidal Metal Sulfides 8. Photo‐Physics of Extremely Small CdS Particles: Q‐State CdS and Magic Agglomeration NumbersBerichte der Bunsengesellschaft für physikalische Chemie, 1984
- From bonds to bands and molecules to solidsProgress in Solid State Chemistry, 1984