Advanced Electronic Materials · 2021 · 29 citations · 38 references
EngineeringCore/crown NplsColloidal NanocrystalsOptoelectronic DevicesLuminescence PropertySemiconductorsElectronic DevicesLight-emitting DiodesAbstract Colloidal NanoplateletsCompound SemiconductorMaterials ScienceElectrical EngineeringPhotoluminescenceNanotechnologyOptoelectronic MaterialsNew Lighting TechnologyNpls FilmNonradiative Energy TransferSolid-state LightingNanomaterialsApplied PhysicsNanofabricationOptoelectronics
Abstract Colloidal nanoplatelets (NPLs) are an emerging semiconductor nanocrystal in the display community due to their ultranarrow emission linewidth. Herein, an ultrapure green emitting nanocrystal light‐emitting diode (LED) based on four‐monolayer CdSe/CdS core/crown NPLs is developed. By applying the nonstacked nanoplates, the nonradiative energy transfer in the NPLs film is successfully suppressed. The nonstacked NPL‐LEDs with pure green emission of 521.5 nm exhibit a low turn‐on voltage of 2.1 V, a maximum luminance of 22 400 cd m −2 , a peak external quantum efficiency (EQE) of 2.16%, which is a sixfold enhancement comparing to the stacked NPL‐LED (EQE = 0.34%). This work demonstrates the potential of core/crown NPLs for ultrawide color gamut displays.
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Perovskite light-emitting diodes with external quantum efficiency exceeding 20 per cent
Kebin Lin, Jun Xing, Li Na Quan et al. · Nature · 2018 · 3.3K citations