Døssing Group
Materials based on the ions Nd3+, Er3+, and Yb3+ emit in the NIR range have for many reasons attracted large interest in the recent years. One reason is that this gives the opportunity to use sensitizers that absorb in the VIS range. This gives an advantage in their use as luminescent tags in biological systems, since biological tissue is more transparent to VIS excitation light than UV excitation light and since cheap light sources such as diode lasers then can be used. Furthermore, Nd3+ and Er3+ ions doped in polymer waveguides may find use as optical amplifiers of 1300 nm and 1500 nm light, respectively, two standard wavelengths used in telecommunication. Optiske egenskaber af lanthanoidbaserede materialer.
The tunability of the optical properties of the semiconductor nanoparticles CdSe quantum dots (CDs) has resulted in a wide use of these species as antennas for light harvesting and photosensitization. Preliminary studies of the optical properties CdSe CDs where the lanthanoide ions Eu3+ or Tb3+ have been incorporated in the lattice have shown that a lanthanoide-centered VIS-emission can be achieved through excitation of the CdSe host. As a continuation we will investigate the optical properties CDs doped with the NIR-emitting metal ions Nd3+, Er3+, and Yb3+.
Contact
Anders Døssing
Associate Professor
Office: B206A
Phone: +45 3532 0114
E-mail: dossing@chem.ku.dk