Fig. 4: Exciton kinetics of [PXZDBFDP]2Cu4I4 and [PhPXZDBFDP]2Cu4I4 based devices.
From: Excited state reversal in copper iodide clusters enables 100% exciton radiation
![Fig. 4: Exciton kinetics 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_Fig4_HTML.png?as=webp)
a Comparison on temperature-dependent luminescent spectra (above) and time decays (below) of the clusters in PL and EL processes. EL spectrum of [PhPXZDBFDP]2Cu4I4 based devices at 300 K is fitted with dual peaks respectively attributed to MLCT and CC radiation; b Time-resolved EL emission spectra (TREES) and sliced TREES contours within 100 µs of the devices. Sliced TRES contours of corresponding films are included for comparison. The enhancement of 3CC band in EL process is highlighted with pink mark.
