We demonstrate ultra-pure green and efficient light emitting diodes (LEDs) by employing the colloidal perovskite nanoplatelets (NPLs). Through the dielectric quantum wells engineering and aggregation induced emission, the perovskite NPLs exhibit an anomalously high photoluminescence quantum efficiency (ηPL) of 94% and a higher exciton binding energy (EB) in the thin solid films. The optimized devices show a high current efficiency of >20 cd A−1 and a maximum external quantum efficiency over 5%. The color gamut covers >97% of the Rec. 2020 gamut area in the CIE 1931 color space, demonstrating the “greenest” LEDs ever reported. We also present large-area (30 mm2) and flexible LEDs based on perovskite NPLs.

© 2018 The Author(s)

PDF Article


You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
Login to access OSA Member Subscription