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The PL/absorption spectra of the two QD samples in toluene and EL spectra of QD-LEDs. Insets are the photos of QD PL.
(a) The structure of the QD-LED; (b) energy level diagram of the materials used in this work; (c) EL spectra of Device A under different voltages. The inset shows the photograph of Device A under operating voltage of 5.0 V; (d) the EL spectra of Device B under different voltages. The inset shows the photograph of Device B under operating voltage of 6.0 V.
(a) Current density-voltage-luminance and (b) efficiency-current density curves of devices A and B. The inset shows the CIE coordinates of the QD-LEDs with respect to the color triangle of NTSC.
(a) PL spectra of TCTA, CBP, and ZnSe/ZnS QDs and absorption spectrum of the QDs in toluene; (b) and (c) represent the TRPL of CBP in QD/CBP and TCTA in QD/TCTA films, respectively.
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