Fig. 4: LED performance. | Light: Science & Applications

Fig. 4: LED performance.

From: Efficient and bright broadband electroluminescence based on environment-friendly metal halide nanoclusters

Fig. 4

a, b High-angle annular dark-field (HAADF) image (a) and the corresponding EDX image (b) (Cu and I are denoted as yellow and green, respectively) of a cross-sectional sample of the LED. Scale bar: 50 nm. c Flat-band energy level diagram. d EL spectra under forward biases of 6, 8, 10, 12, and 14 V. e, f Current density–luminance–voltage characteristics (e) and the corresponding LER/EQE–luminance relationship (f) of the champion device. g Histogram of peak EQEs measured from 81 devices from 9 batches. h, i Digital photos of a large-area device with an active size of 3 × 3 cm2 (h) and a flexible device fabricated on an ITO–PET substrate (i)

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