Theoretical investigation of the organic light-emitting diode activated by nanocrystal quantum dots

Journal article

We have developed a rate equation model to study the light emission intensity and quantum efficiency of an organic light-emitting diode (OLED), in which the emissive layer of nanocrystals (NCs) is embedded between the electron and hole transport layers of organic semiconductors, e.g. at the organic-organic interface. We have found that the NC-OLED light emission intensity and quantum efficiency are mainly affected by the efficiency of the Forster injection of excitons into the nanocrystals from the organic-organic interface, and they are less sensitive to the exciton diffusion at this interface. We have shown that there is an optimum concentration of nanocrystals, at which the light emission intensity reaches its maximum, while the quantum efficiency of the NC-OLED decreases monotonically with the nanocrystal concentration.

Authors: Kohary, K; Burlakov, V; Pettifor, D

• Publication status: Published
• Journal: JOURNAL OF OPTOELECTRONICS AND ADVANCED MATERIALS
• Volume: 9
• Issue: 1
• Pages: 18-23
• Publication date: 2007-01-01
• ISSN: 1454-4164
• Language: English
• Keywords: Forster energy transfer; organic light-emitting diode; nanocrystals