Observation of thermoluminescence in crystalline tris(2-phenylpyridine) iridium microrods using a Fourier transform spectrometer

- The weak TL of Ir(ppy)3 could be measured by a Fourier transform spectrometer.
- The glow curves and TL spectra were analyzed to elucidate the emission origin.
- Various types of charge-carrier trap sites exist in crystalline Ir(ppy)3.
- Charge-carrier trapping depends on the environment to which it has been exposed.