Characterizations of PeLEDs and perovskite films (IMAGE)
Caption
(A) Device and molecule structures of the alkylammonium cations.
(B) EQE as a function of current density for the devices.
(C–G) GIWAXS patterns and SEM images of perovskite films without (C) and with AAs: (D) n = 3, (E) n = 4, (F) n = 5, and (G) n = 6. Scale bars represent 500 nm.
(H) Azimuth integration at q ≈ 1 of perovskite films for (100) direction. The inserts are GIWAXS patterns of the films in the out-of-plane and in-plane directions.
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