Solution-processed infrared light emitting diodes:  Origins and optimization of quantum efficiency.
Published: 2004
Language: eng
Number of pages: 90
Description: This thesis reports on a systematic investigation of the factors that affect the electroluminescence quantum efficiency of solution-processed polymer-nanocrystal light emitting diodes. The overall efficiency is the product of the nanocrystal internal efficiency, the energy/charge capture efficiency and the carrier injection efficiency. Polymer nanocomposites are used as the active layer of the device and concentration regimes are determined, where the internal efficiency and energy transfer efficiency are both maximized. Maximization of bipolar carrier injection efficiency is also sought through variation of the active layer thickness and contact technology. Maximum external electroluminescence quantum efficiency of 0.22% is achieved---25 times higher than previously reported results in PbS systems. Discoveries on the physical excitation mechanism of the nanocrystals are also reported.
Notes: Adviser:  Ted Sargent.

Thesis (M.A.Sc.)--University of Toronto, 2004.

Electronic version licensed for access by U. of T. users.

Source: Masters Abstracts International, Volume: 43-03, page: 0936.

MICR copy on microfiche (2 microfiches).