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. 2019 Dec 10;10:5633. doi: 10.1038/s41467-019-13580-w

Fig. 1. Photoluminescence enhancement by PEACl and YCl3 incorporation in perovskite films.

Fig. 1

a PL spectra of CsPbBr2.4Cl0.6, CsPbBr2.4Cl0.6:2%YCl3, CsPbBr3:PEACl (1:1), and CsPbBr3:PEACl:2%YCl3 films. b CIE coordinates of CsPbBr2.4Cl0.6 (1), CsPbBr2.4Cl0.6:2%YCl3 (2), CsPbBr3:PEACl (1:1) (3), and CsPbBr3:PEACl:2%YCl3 (4) films. CIE coordinates of CsPbBr3:PEACl:2%YCl3 (5) device and CsPbBr3:PEACl:10%YCl3 (6) device. c A photograph of the films under UV lamp. The composition of each film is labeled in the photograph. d Power-dependent PLQEs of the perovskite films with different compositions.