Si-based light emitters and their use for smart biosensor applications


Si-based light emitters and their use for smart biosensor applications

Rebohle, L.; Cherkouk, C.; Prucnal, S.; Skorupa, W.; Helm, M.

In this presentation we will give a review about our recent progress in the development of rare earth-implanted Si-based light emitters. The devices consist of a MOS structure with a transparent front electrode made of indium tin oxide (ITO) and a SiON protection layer between the oxide and the ITO layer for a strong life time improvement. Gd, Tb and Eu are implanted in the middle of the oxide layer, and depending on the element the devices show strong electroluminescence in the UV, the green and in the red spectral region. The electrical and electroluminescence properties of these devices are discussed and evaluated in respect of possible applications on the field of biosensor technology. Based on the advantages and the shortcomings of these light emitters an approach for their use in biosensor applications is developed. In this approach the light emitters are utilized for the detection of biological substances by fluorescence analysis. There the emitter is directly placed beneath the dye-labelled sample exciting the dye whose light emission can be recorded by a suitable external detector. A very promising application is the detection of organic pollutants, e.g. estrogen, in drinking water.

Keywords: Smart biosensing; Estrogen detection; Si-based light emission; Electroluminescence; Rare earth ion implantation

  • Lecture (Conference)
    E-MRS 2008 Spring Meeting, 26.-30.05.2008, Strasbourg, Frankreich

Permalink: https://www.hzdr.de/publications/Publ-11823
Publ.-Id: 11823