The purpose of this work was to investigate certain features observed in the relaxation of nonequilibrium charge carriers in СdSe quantum dots (QDs) under a high excitation intensity. We studied close-packed films obtained by the deposition of CdSe/CdS/CdZnS (core–shell–shell) colloidal QDs on glass substrates. The QDs radius of 2.7 nm with the size dispersion 4 % was determined.     Fig. 1. Time-resolved PL spectrum of QDs     Fig. 2. Instant PL spectra of QDs     The QDs photoluminescence (PL) was excited by a single 30 ps pulse of the second harmonic (539 nm) of a mode-locked YAlO3: Nd3+ laser at room temperature. The spectral decomposition of the PL signal collected from the front face of the film was performed using a polychromator. The PL kinetics was recorded by a streak camera AGAT SF-I. The PL spectrum is located along the streak camera entrance slit. The image of the time-resolved PL spectrum of QDs obtained on the streak camera screen was registered by a digital camera and is presented in Fig. 1. The distributions of the phosphorescence intensity of the screen along the wavelength axis integrated within the camera time resolution interval (70 ps) correspond to the instant PL spectra of QDs presented in Fig. 2. The PL spectra in Fig. 2 correspond to various time delay values (in ps) after the moment when the PL excitation starts: (a) 70, (b) 210, (c) 350, (d) 420, (e) 490, and (f) 700.     Line A (643 nm) appears in the excitation moment, enhances (210 ps), dominates and peaks in the spectrum (350 ps); then it dramatically weakens (420 ps) and decays (490 ps). Line F (620 nm) appears with a 210 ps delay; then it peaks at 350 ps, its intensity remains virtually constant within the range of 350 – 490 ps, and slowly decays over 3 ns. These results are discussed in the framework of the theory of excitonic and biexitonic phenomena in QDs and are associated with the amplified spontaneous emission in close-packed QD films.