Electronic structure and red emission of Mn-ion-doped SrZrO3

We investigated the properties of the red emission from Mn-ion-doped SrZrO3 (SZMO) which may be a candidate of a red phosphor for a white light-emitting diode. We assigned optical transitions observed in photoluminescence and photoluminescence excitation spectra according to the Tanabe-Sugano diagram for the d3 configuration in a perovskite. We estimated the crystal field splitting energy 10Dq and the Racah parameter B to be 19,230 cm−1 and 701 cm−1 for the Mn ion in SZMO, respectively. We found a strong red emission near 650 nm with several sharp peaks related to vibronic modes. The red emission was found to be drastically enhanced at very low temperature and very small doping.