Fig. 4: Balancing the microcavity effect, total light outcoupling, and electrical performance.
a Effect of QDs’ natural emission linewidth on current efficiency. b Optical mode as a function of viewing angles (white dashed line: QD emission peak). c Effect of QDs’ natural emission linewidth on angular color shifts. d Effects of top mirror’s reflectivity. e Effect of semiconducting layers’ thickness. ni and di denote the refractive index and thickness of each non-metallic layer, respectively. f Antinode enhancement factor effect. L1 and L2 denote the distance of the emitting layer to the top and bottom of the cavity, respectively (The device parameters for d–f are detailed in Supplementary Table 1). g Radar chart summarizing the device performance. Color shift data was not provided in reference21. For the integrity of the bottom-emitting QLED data, we referred to the best result reported elsewhere from a similar device (see Supplementary Table 2). h Comparison of CE and EQE. i CE and lifetime with benchmarking QLEDs, including both bottom and top emission green devices. The reference numbers are indicated within square brackets.
