Fig. 2: Total intensity of P3 emission in the air.
From: Prolonged photostability in hexagonal boron nitride quantum emitters
Since individual time-traces have discrete bleaching steps as shown in Fig. 1e and Supplementary Fig. 2a, the overall decay curves of total intensity are obtained by summing up N time-traces. Here, N = 31, 7, 19 and 6 for (a) monolayer CVD hBN, (b) multilayer CVD hBN, (c) liquid exfoliated hBN with type-I emission and (d) liquid exfoliated hBN with type-II emission, respectively. Red dashed lines and yellow dotted lines are fitting with one exponential decay function, and the sum of two exponential decay functions, respectively. From the one-exponential fitting with 95% confidence interval, the bleaching lifetime in monolayer CVD hBN is 6.6 ± 0.6 s. From the two-exponential fitting with 95% confidence interval, two bleaching lifetimes are extracted for monolayer CVD hBN, multilayer CVD and liquid exfoliated hBN with type-I emission, which are 2.9 ± 0.1 and 55 ± 3.2 s, 11 ± 4.1 and 170 ± 20 s, and 10 ± 1.6 s and 220 ± 30 s, respectively. Liquid exfoliated hBN with type-II emission has a bleaching lifetime longer than 2000 s, which is regarded as photostable.
