Amine-derived synthetic approach to color-tunable InP/ZnS quantum dots with high fluorescent qualities

摘要: High-quality, Cd-free InP quantum dots (QDs) have been conventionally synthesized by exclusively selecting tris(trimethylsilyl)phosphine (P(TMS)3) as a phosphorus (P) precursor, which is problematic from the standpoint of green and economic chemistry. Thus, other synthetic chemistries adopting alternative P sources to P(TMS)3 introduced, however, they could not guarantee production satisfactorily fluorescence-efficient, color-pure QDs. In this study, unprecedented controlled synthesis series band-gap-tuned QDs demonstrated through hot-injection far safer cheaper tris(dimethylamino)phosphine in presence key coordinating solvent oleylamine that enables successful QD nucleation/growth. Effects co-existence Zn additive, core growth temperature, amount source injected on behaviors are investigated. After ZnS overcoating successive injection 1-dodecanethiol only, high-fluorescence-quality, green-to-red color emission-tunable core/shell InP/ZnS obtained. The fluorescent characteristics different color-emitting desirably exhibit little fluctuations yield emission bandwidth, specifically ranging 51–53 % 60–64 nm, respectively. Lastly, utility introduction secondary shelling process rendering more bright, photostable also proved.