Energy Material Advances / 2021 / Article / Fig 4

Research Article

Pushing the Band Gap Envelope of Quasi-Type II Heterostructured Nanocrystals to Blue: ZnSe/ZnSe1-XTeX/ZnSe Spherical Quantum Wells

Figure 4

Device characteristics of dichromatic white NC-LED employing blue- and yellow-emitting ZnSe/ZnSe1-XTeX/ZnSe SQW NCs. (a) Schematic illustrations of dichromatic white NC-LED employing blue- and yellow-emitting ZnSe/ZnSe1-XTeX/ZnSe SQW NCs (left) and its energy band diagram (right). (b) Current density-voltage-luminance characteristics and (c) external quantum efficiency (EQE) versus current density of dichromatic white NC-LED. (d) The normalized EL spectra of white NC-LED operated at different applied voltages. (e) The CIE 1931 color space chromaticity diagram demonstrating the color coordinates of EL spectra of white NC-LED operated at different applied voltages.
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