Author Correction: Coherent spin dynamics of electrons and holes in CsPbBr3 perovskite crystals

Abstract

The original version of this Article contained an error in Fig. 2c, in which the numbers on the y-axis were given in the wrong order: '800' at the bottom through to '0' at the top. This has been corrected in both the PDF and HTML versions of the Article. Also, the Source Data file initially published online was corrupted and was replaced.

Coherent Spin Dynamics of Electrons and Holes in CsPbBr3 Colloidal Nanocrystals

“…We use here the knowledge of the exciton g-factor, g X = +2.4, that we measured in CsPbBr 3 NCs, 13 and the fact that in lead halide perovskites, g X = g e + g h . This allows us to conclude that in the studied NCs, both electron and hole g-factors are positive, similar to CsPbBr 3 bulk crystals; 32 for details see Section S4 in the Supporting Information.…”

“…Its PL spectrum (Figure 4a) has an 325 asymmetric shape with a low-energy tail, similar to the low-326 temperature emission of bulk CsPbBr 3 . 32 The spin precession 327 monitored by ppFR is given in Figure 4b at B V = 0.25 T and T 328 = 5 K. Similar to the NCs, it contains two Larmor precession 329 frequencies, where a fit with eq 1 gives the following ns. It is reasonable to suggest that similar to 332 CsPbBr 3 bulk and NCs, g e > 0 and g h > 0 in the film.…”

“…These decay times are considerably shorter than the 104 exciton decay time of 0.9 ns in CsPbBr 3 bulk crystals. 32 In 105 general, the emission of an NC ensemble can be contributed 106 by neutral and charged NCs. Therefore, the PL can contain the 107 emission of neutral, negatively charged, and positively charged 108 excitons.…”

“…Here S e(h) is the amplitude of the electron (hole) spin signal, ω L,e(h) is the Larmor precession frequency of electrons (holes), We attribute the high-frequency component with the gfactor of 1.73 to the electron and the low-frequency component with the g-factor of 0.83 to the hole by analogy to bulk CsPbBr 3 perovskites. 32 Note that our experimental technique is not sensitive to the g-factor sign, which should be determined using an alternate method. We use here the knowledge of the exciton g-factor, g X = +2.4, that we measured in CsPbBr 3 NCs, 13 and the fact that in lead halide perovskites, g X = g e + g h .…”

“…is the spin dephasing time at zero magnetic field, 32 This may be related to the spread of 238 NC sizes and shapes, which determines the g factor and its 239 anisotropy. In fact, as we will show, it exceeds several T R periods and corresponds to a cumulative effect due to repeated pulse application.…”