PREPARATION AND PHOTOPHYSICS OF STRONGLY LUMINESCING CD3P2 QUANTUM DOTS

The wet chemical preparation, the electron microscopic characterizatio n, and the temperature-dependent absorption as well as both the static and time-resolved fluorescence properties of Cd3P2 quantum dots are p resented. The particles are strongly size quantized as seen from the 1 .5 eV blue shift of the first electronic transition compared to the bu lk bandgap of 0.5 eV. The particles emit close to the onset of absorpt ion, exhibiting a quantum yield of 0.25 at room temperature. The lumin escence decay has a multiexponential appearance at room temperature wh ich transforms into two clearly distinguishable decay channels at low temperatures.