InP is the best investigated III-V QDs. Regarding their bulk band gaps of 1.35 eV, InP QDs are considered as the most viable alternatives to Cd-based QDs for visible wavelength emission. Due to their large excition bhor radius, high extinction co-efficiency, board range of emissions that covering the whole visible range and extends to the near infrared, and containing no heavy metal elements, InP QDs have great potential to be used in flat panel display backlighting, QD-LED, lighting devices, biomedical markers, fingerprinting, and solar cell applications.
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