Three-color white electroluminescence emission using perovskite quantum dots and organic emitters

[Display omitted] •Three-color white emission was first achieved by perovskite QD and organic emitter.•The device was fabricated using the perovskite and OLED materials inside the device.•White emission was implemented by controlling the charge balance of emitting layers.•WPeQD-OLED device showed high performance of 49,000 cd/m2, 4.48 cd/A, and 2.16 lm/W. To realize a full-color display in the research field of perovskites or perovskite-structured quantum dots (PeQDs), the development of white-light-emitting devices that operate by emitting light of three primary colors (red, green, and blue) has emerged as an active research topic. In the present study, we report for the first time three-color white-light emission with high brightness from white-emitting PeQD organic light-emitting diodes (WPeQD-OLEDs) fabricated using a PeQD material and organic emitters. A WPeQD-OLED bilayer was prepared by depositing a blue-emitting organic layer on top of a CsPb(Br/I)3 QD layer mixed with N9,N10-Bis(4-(tert-butyl)phenyl)-N9,N10-Di-o-Tolylanthracene-9,10-Diamine (p-Tb-o-Me-TAD), which were spin-coated as red and green emitters, respectively. The WPeQD-OLED device was stable during operation and demonstrated emission of three primary colors. In the WPeQD-OLED device, charge carriers were distributed by an 9-(naphthalen-1-yl)-10-(naphthalen-2-yl)anthracene (α,β-ADN) blue-emitting host material with a deep highest occupied molecular orbital level. The electroluminescence (EL) spectra of the WPeQD-OLEDs showed EL maximum peaks at 460, 527, and 640 nm; the CIE color coordinates of the emitted light were (0.33, 0.40). The EL results confirmed that the maximum luminance was 49,000 cd m−2 and the maximum luminance efficiency and power efficiency were 4.48 cd A−1 and 2.16 lm W−1, respectively.