Fig. 1: Characterizations of cesium–copper–iodide films with Tween. | Nature Communications

Fig. 1: Characterizations of cesium–copper–iodide films with Tween.

From: Efficient and bright warm-white electroluminescence from lead-free metal halides

Fig. 1

a Schematic diagram of the emitter material, which is a mixture of Cs3Cu2I5 and CsCu2I3 crystallites. The Tween molecule can chemisorb onto cesium copper iodides. b XRD pattern compared to the calculated XRD patterns of Cs3Cu2I5 and CsCu2I3. * and # denote the diffraction peaks corresponding to Cs3Cu2I5 and CsCu2I3. c PL spectra. The inclusion of Tween enhances the PL intensity. d Normalized PLE spectra at various emission wavelengths. e SEM image. Scale bar, 1 μm.

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