Fig. 3 | Nature Communications

Fig. 3

From: Minimising efficiency roll-off in high-brightness perovskite light-emitting diodes

Fig. 3

Fluence-dependent emission properties of perovskite MQW films. a Excitation-intensity-dependent PLQE of the 2:1:2 NFPI7 MQW film under pulsed laser excitation. b Time-resolved PL decay transients of the 2:1:2 NFPI7 MQW film under different excitation intensities. c Excitation-intensity-dependent PLQEs of the 2:1:2 and 2:1.9:2 NFPI7 MQW films under continuous-wave laser excitation. d Schematic representation of charge recombination in MQWs with different well widths. e PL (445 nm excitation) spectra of the 2:1:2 and 2:1.9:2 NFPI7 MQW films. f Excitation-intensity-dependent PLQE of the 2:1.9:2 NFPI7 MQW film under pulsed laser excitation. g Time-resolved PL decay transients of the 2:1.9:2 NFPI7 MQW film under different excitation intensities

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