Given the suppressed interband emission at short wavelengths, the question arises whether the excitation of d -band holes contributes to the observed PL at all and, if so, whether excitation at both critical points is relevant. To answer this question, the absorption processes that precede the emission must be determined. However, this cannot be done from the absorption spectra in Figure , as these potentially also include "dark" absorption processes without subsequent emission. In order to isolate the absorption processes that eventually lead to emission, we determined the PLE spectrum from a systematic measurement of the PL for different excitation wavelengths. The PL spectra measured for different λ ex are presented in Figure . We determined the PL for λ ex ranging from 425 nm to 620 nm, in intervals of 5 nm. The PL was separated from the excitation laser by longpass filters with a fixed cut-on wavelength. Due to filter limitations on possible excitation wavelengths, two distinct filter sets with cut-on wavelengths at 550 nm (window I: excitation: 410 nm -540 nm, emission: 550 nm -800 nm) and at 650 nm (window II, excitation: 500 nm -605 nm, emission: 650 nm -800 nm), to optimize the trade-off between a large spectral emission window and possible excitation wavelengths. The excitation power was carefully adjusted before each measurement to obtain the same excitation intensity. The most prominent change in the PL spectra with increasing λ ex is the decreasing intensity of the PL. Since, on the other hand, the absorption of both the film and the individual particles