ABSTRACT
We present an accurate approach for determining energies of features in photoluminescence (PL) and photoluminescence excitation (PLE) spectra that is essentially independent of assumptions about baselines and spectral lineshapes. We Fourier transform these spectra and analyze the phases and amplitudes of the resulting coefficients in reciprocal space. Comparing results with those obtained by conventional real-space analysis, we show that reciprocal-space analysis is more accurate when baseline effects are significant. In addition, our procedure allows the effects of finite monochromator resolution to be corrected, and an optimum monochromator slit width for PL measurements to be defined.
