• • ZnSeTe QDs achieve near-unity photoluminescence quantum yield (PL QY) up to ~100% through NH4F molecular-assisted synthesis, enabling highly efficient blue QLEDs with external quantum efficiency (EQE) exceeding 20% (ref. [49]). This addresses the critical efficiency bottleneck for heavy-metal-free blue emitters.
• • Shell engineering reduces emission linewidth to ~20 nm for pure-blue ZnSeTe QDs, achieving high color purity with CIE coordinates approaching (0.15, 0.06) (ref. [55]). This meets the stringent color gamut requirements for next-generation displays (e.g., BT.2020).
• • Morphological inhomogeneity in ZnSe1–XTeX nanocrystals significantly impacts excitonic states, with Te composition fluctuations causing spectral broadening and efficiency loss (ref. [43]). Controlling Te homogeneity via molecular additives (e.g., tellurium homogenization) is essential for stable blue emission.
• • ZnF2-assisted synthesis of InP/ZnSe/ZnS QDs demonstrates that fluoride-based surface treatments can enhance electroluminescence stability, with device operational lifetime (LT50) exceeding 1000 hours at 100 cd/m² (ref. [44]). This strategy is transferable to ZnSeTe systems to mitigate degradation.