Abstract
A convenient method for quantum yield measurement is presented. An integrating sphere is arranged in a spectrometer system and thermopile energy calibration is employed. Although an absolute measurement is required for quantum yield, the thermopile energy calibration with the integrating sphere system is able to connect between absorbed and emitted energy from luminescent medium without absolute measurement for absorption and emission energies. In our new method, quantum yield is calculated from only four measured spectra and six voltages using the system and it can be measured over wide spectral range (0.25-2.5μm). The strict requirements for samples are reduced, e.g., polishing, scattering free, sample shape, the reproducibility is ±1.15% and the error is estimated ±6.84% over 400nm (±10.62% over 250nm).
