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Showing 1–2 of 2 results
Advanced filters: Author: Dharmendar Kumar Sharma Clear advanced filters

  • Halide perovskite nanocrystals show high photoluminescence (PL) but their electroluminescence (EL) devices suffered from low external quantum efficiency. Here Sharma et al. study both individual and statistical PL and EL behaviors of these nanocrystals and reveal the origin of the lower EL efficiency.

    • Dharmendar Kumar Sharma
    • Shuzo Hirata
    • Martin Vacha
    ResearchOpen Access
    Nature Communications
    Volume: 10, P: 1-9

  • Silver indium sulfide (AgInS2) semiconductor nanoparticles are cadmium-free quantum dots emitting in visible to near infrared regions. The present study demonstrates the narrowing of their broad defect emission by coating AgInS2 core nanoparticles with amorphous indium sulfide or gallium sulfide shells. The new emission from the core/shell nanoparticles originating from the band-edge transition is substantially narrower (FWHM of 28.6 nm) than the defect emission of core nanoparticles (FWHM of 220 nm). The photoluminescence quantum yield is increased to 56% after giving several modifications to the synthetic procedures so that we can see the vibrant yellow emission under room light.

    • Taro Uematsu
    • Kazutaka Wajima
    • Susumu Kuwabata
    ResearchOpen Access
    NPG Asia Materials
    Volume: 10, P: 713-726