Nanoplatelet-Based Light-Emitting Diode and Its Use in All-Nanocrystal LiFi-like Communication

• DOI: 10.1021/acsami.0c05264
• Publication Date: 2020-04-15T10:48:07Z
• Authors: Junling Qu; Prachi Rastogi; Charlie Gréboval; Clément Livache; Marion Dufour; Audrey Chu; Sang-Soo Chee; Julien Ramade; Xiang Zhen Xu; Sandrine Ithurria; Emmanuel Lhuillier
• Keywords: Quantum Efficiency

Now that colloidal nanocrystals (NCs) have been integrated as green and red sources for liquid crystal displays, the next challenge quantum dots is their use in electrically driven light-emitting diodes (LEDs). Among various NCs, nanoplatelets (NPLs) appeared promising candidates devices because two-dimensional shape allows a narrow luminescence spectrum, directional emission, high light extraction. To reach efficiency, it critical to grow core/shell structures. High temperature growth of shells seems be better strategy than previously reported low-temperature approaches obtain bright NPLs. Here, we synthesize CdSe/CdZnS NPLs whose shell alloy content tuned optimize charge injection LED structure. The obtained has exceptionally low turn-on voltage, long-term stability (>3100 h at 100 cd m–2), external efficiency above 5%, luminance up 35,000 m–2. We study performance find there delay droop terms current density decreases. In last part paper, design large (56 mm2 emitting area) test its potential LiFi-like communication. such an approach, not only lightning source but also used transmit communication signal PbS dot solar cell broadband photodetector. Operating conditions compatible with both lighting information transfer identified. This work paves way toward all NC-based setup.