Multiple colour emission from an organic light-emitting transistor

The unique property of ambipolar organic light-emitting field-effect transistors that the position of the light emission zone within the transistor channel can be controlled by the applied biases opens novel aspects for applications. In this contribution we demonstrate a transistor with electrically tuneable emission colour by taking advantage of the controlled displacement of the light emission zone. The colour change is achieved due to a colour conversion layer covering partially the transistor channel. Depending on the position of charge carrier recombination the emitted light of the transport layer or the converted light from the colour conversion layer can be detected.

Graphical abstractIn this contribution we demonstrate a transistor with electrically tuneable emission colour by taking advantage of the controlled displacement of the light emission zone. The colour change is achieved due to a colour conversion layer covering partially the transistor channel. Depending on the position of charge carrier recombination the emitted light of the transport layer or the converted light from the colour conversion layer can be detected.Figure optionsDownload full-size imageDownload as PowerPoint slideHighlights► We demonstrate a transistor with electrically tuneable emission colour. ► Therefore we use the controlled displacement of the light emission zone. ► The colour change is achieved by an additional layer covering partially the channel. ► Depending on the position of light emission the emitted light is either converted or not. ► The emitted light can be changed from green to yellow.