Fig. 5 | npj Flexible Electronics

Fig. 5

From: Flexible quantum dot light-emitting diodes for next-generation displays

Fig. 5

Flexible white QLEDs. a Device structure (left) and corresponding energy diagram (right) of a white QLED with mixed RGB QD emitting layers. b, c EL of flexible white QLEDs (b) and corresponding EL spectra (c). d Scheme illustrating the transfer-printing process for a QD monolayer. Structure of white QLED with multiple stacked QD layers and corresponding cross-sectional TEM image. Scale bar, 10 nm. e PL spectrum of B/G/B/R white QLEDs under various applied voltages. f TRPL decay of multistacked QD films with different layer structures. g Flexible white QLED with RGB patterns prepared using pick-and-release transfer printing. Inset shows the RGB pixels of the white QLED. h RGB patterns for white QLEDs using intaglio transfer printing. i Ultrathin white QLED array attached to human skin. j TRPL spectra of a blue QD layer and white QLEDs composed of RGB pixels (pixelated white QLED; PWQLED) and mixed QD layer (MWQLED). Figure reproduced with permission from: ac ref. 109 © 2014 Wiley; df ref. 111 © 2013 NPG; g ref. 97 © 2011 NPG; hj ref. 99 © 2015 NPG

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