Fig. 2: Ultrashort laser pulse doubling by perovskite multiple quantum wells (MQWs). | Nature Communications

Fig. 2: Ultrashort laser pulse doubling by perovskite multiple quantum wells (MQWs).

From: Ultrashort laser pulse doubling by metal-halide perovskite multiple quantum wells

Fig. 2

a Pseudocolor time-resolved photoluminescence (TRPL) images show the spectrum evolution with time of the MQWs (upper panel) and 3D (lower panel) perovskite films at three representative pump fluences, respectively. b and c The extracted TRPL decay curves of b perovskite MQWs at the position of 780 ± 20 nm and c 3D perovskite at the position of 790 ± 20 nm under different pump fluences. These results were collected from samples excited with 400-nm laser pulses (1 kHz, 50 fs).

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