Fig. 3: Electroluminescence performances of [PXZDBFDP]2Cu4I4 and [PhPXZDBFDP]2Cu4I4 based devices.
From: Excited state reversal in copper iodide clusters enables 100% exciton radiation
![Fig. 3: Electroluminescence performances of [PXZDBFDP]2Cu4I4 and [PhPXZDBFDP]2Cu4I4 based devices.](http://media.springernature.com/full/springer-static/image/art%3A10.1038%2Fs41467-025-67664-x/MediaObjects/41467_2025_67664_Fig3_HTML.png?as=webp)
a Device configurations of ITO | PEDOT:PSS (40 nm)|BCPO:clusters (x%wt., 40 nm)|TmPyPB (50 nm)|LiF (1 nm)|Al (100 nm), chemical structures of BCPO and TmPyPB and device photos at 10 V; b EL spectra of the devices with x = 20 at 10 V, and the corresponding coordinates on CIE1931 chromaticity plane; c Current density (J)-Voltage-Luminance characteristics of CLEDs at x = 20; d Efficiencies-Luminance relationships of the devices at x = 20. PE, CE and EQE refer to power efficiency, current efficiency and external quantum efficiency, respectively. EQE values at the maximum, 100 and 500 nits are highlighted with arrows, respectively; e Comparison on the maximum EQE values of the representative EL clusters.
