0428同步年報-2021-全

062 ACTIVITY REPORT 2021 a highly ordered intermediate phase within only a few seconds. Details regarding the mechanism of PQW formation and the relative phase transformation elucidated in this study would guide the control of chemical reactions toward the desired PQW/3D perovskite hierarchy, facilitating further improvements in both the optoelectronic property and stability, and ultimately benefiting the implementation of PQWmodified with the 3D perovskite hierarchy in the near future. (Reported by Yan-Gu Lin) This report features the work of Gang Li and his collaborators published in Adv. Mater. 33 , 2006238 (2021) . TLS 23A1 Small/Wide Angle X-ray Scattering • SAXS, WAXS • Soft Matter, Protein Crystallography, Materials Science, Atomic and Molecular Science Reference 1. H. Hu, M. Qin, P. W. K. Fong, Z. Ren, X. Wan, M. Singh, C.-J. Su, U.-S. Jeng, L. Li, J. Zhu, M. Yuan, X. Lu, C.-W. Chu, G. Li, Adv. Mater. 33 , 2006238 (2021). Fig. 1 : (a) Time-resolved GIWAXS intensity maps showing the formation of an ordered intermediate phase during HTAB solution (10 × 10 −3 M) spin coated on top of a pristine 3D perovskite layer. (b,c) 2D GIWAXS patterns for perovskite films before (@8 s) and after (@48 s) HTAB dripping, as indicated by the black dashed lines in (a). (d) Extracted intensity @ q = 0.31 Å –1 (ordered intermediate phase, as indicated with a red arrow in (c)) as a function of time. (e) Integrated intensity versus q from 2D GIWAXS patterns at 8 s (black) and 48 s (red). (f) Magnification of the integrated intensity versus q in the low q regime. [Reproduced from Ref. 1] (a) (d) (e) (f) (b) (c)