ZnSeTe quantum dots (QDs) show promise in advancing high-performance pure blue quantum dot light-emitting diodes (QLEDs) for high-definition displays, owing to their exceptional luminescent properties and environmental characteristics. However, the current most efficient synthesis method involves a challenging and hazardous step: injecting water-based hydrofluoric acid treatment under high-temperature conditions. Herein, a novel approach utilizing inorganic fluoride NH₄F as a molecular additive is introduced to simplify the synthesis of highly efficient ZnSeTe/ZnSe/ZnS blue QDs. The resulting QDs exhibit tunable photoluminescence (PL) wavelengths in the pure blue region with near-unit PL quantum yield (QY). Notably, the use of NH₄F passivates the ZnSeTe cores, enhancing stability and facilitating high-quality coating of the subsequent shell layer, ultimately reducing nonradiative recombination rates and improving PL QY. To evaluate the practical application of these blue ZnSeTe/ZnSe/ZnS QDs, we utilized them as an emitting layer to fabricate QLEDs with two typical structures. The results demonstrated that the external quantum efficiency of the standard QLED and inverted QLED can reach 17.2% and 16.3%, respectively, showing comparable performance to QLEDs with QDs prepared through classical HF addition synthesis steps. This environmentally friendly synthesis strategy for pure blue ZnSeTe QDs with high PL QY through NH₄F assistance is expected to offer insights for synthesizing other environmentally friendly QDs, thus facilitating the development of eco-friendly QLEDs.

ZnSeTe 量子点 (QD) 凭借其卓越的发光特性和环境特性，在推进用于高清显示器的高性能纯蓝色量子点发光二极管 (QLED) 方面展现出前景。然而，目前最有效的合成方法涉及一个具有挑战性和危险性的步骤：在高温条件下注入水基氢氟酸处理。在此，提出了一种利用无机氟化物NH ₄ F作为分子添加剂的新方法来简化高效ZnSeTe/ZnSe/ZnS蓝色量子点的合成。所得的量子点在纯蓝色区域表现出可调谐光致发光 (PL) 波长，并具有接近单位 PL 量子产率 (QY)。值得注意的是，NH ₄ F的使用钝化了ZnSeTe核，增强了稳定性并促进后续壳层的高质量涂层，最终降低非辐射复合率并提高PL QY。为了评估这些蓝色 ZnSeTe/ZnSe/ZnS QD 的实际应用，我们利用它们作为发光层来制造具有两种典型结构的 QLED。结果表明，标准QLED和倒置QLED的外量子效率分别达到17.2%和16.3%，表现出与通过经典HF加成合成步骤制备的QD的QLED相当的性能。这种通过NH ₄ F辅助实现具有高PL QY的纯蓝色ZnSeTe QD的环保合成策略有望为合成其他环保QD提供见解，从而促进环保QLED的开发。