Fig. 1. Recombination pathways in quantum dot films. (a) Free exciton recombination; (b) exciton complex bound by accept A; (c) exciton complex bound by donor D; (d) donor-accept pair recombination; (e) free hole and neutral donor recombination; (f) free electron and neutral accept recombination

Fig. 2. Carrier generation, dissociation, jumping, and trap capture in CQD

Fig. 3. Effect of effective lifetime on PCR signal. (a) Amplitude; (b) phase

Fig. 4. Effect of trap capture lifetime on PCR signal. (a) Amplitude; (b) phase

Fig. 5. Effect of trap decapture rate on PCR signal. (a) Amplitude; (b) phase

Fig. 6. Experimental device of optical carrier radiation technique

Fig. 7. PCR signal of samples at different powers. (a) Amplitude; (b) phase

Fig. 8. Measured PCR signals and best-fit results. (a) Amplitude; (b) phase

Fig. 9. Dependences of PCR signal on position. (a) Amplitude; (b) phase