A reactivity-controlled epitaxial growth strategy for synthesizing large nanocrystals

Large ZnSe nanocrystals are expected to be promising blue-light emitters with an emission peak of 455–475 nm, which is important for the construction display apparatus. The final size via one-step injection can varied by reactivity Zn and Se precursors; however, it has a limit <5 nm. To describe key factors in determining nanocrystals, we proposed nuclei number-considered LaMer model based on Maxwell–Boltzmann distribution crystal embryos. As result, general strategy reactivity-controlled epitaxial growth was developed synthesize large through sequential high-reactivity low-reactivity precursors. resultant achieved pure blue between 455 470 We further fabricated stable, ZnSe/ZnS core–shell photoluminescence quantum yields up approximately 60%. Moreover, versatile could used ZnSe, CdSe PbSe average sizes 35 76 nm 87 respectively. control quantum-confined classical effects these semiconductor will open new directions fundamental research application exploration. Synthesizing Se-based diameters remains challenging. Here, demonstrated emitted light, technology.