The size-dependent optoelectronic properties of semiconductor nanocrystal quantum dots (QDs) offer exceptional tunability for color control, yet inherently cause a relative photoluminescence brightness mismatch among QDs emitting different colors. Larger emitters absorb more incident photons than smaller ones, leading to disproportionate brightness. This study investigates how core composition, shell composition, and shell thickness influence optical properties—specifically high-energy absorption, quantum yield (QY), and relative brightness—in InP/ZnS, InP/ZnSe core/shell, and InP/ZnSe/ZnS core/shell/shell QDs across various excitation wavelengths. Results reveal that an intermediate ZnSe shell shifts the onset of enhanced absorption and produces highly excitation wavelength-dependent QYs. Replacing commercial CdSe/ZnS QDs with InP/ZnS reduces the brightness mismatch between green and red emitters from 33-fold to just 5-fold. Introducing a 4-monolayer-thick, optically absorbing ZnSe shell into the QD heterostructure, followed by heating in zinc oleate and trioctylphosphine solution, yields InP/ZnSe/ZnS QDs that are 10-fold brighter than their InP/ZnS counterparts.A1BG Antibody Technical Information Unlike CdSe/CdS/ZnS QDs—which only emit at red wavelengths due to their quasi-type II band structure—type I InP/ZnSe/ZnS QDs can generate a full spectrum of visible-emitting, brightness-matched emitters.PCCA Antibody Technical Information By precisely tuning the intermediate ZnSe shell thickness, heavy metal-free, brightness-matched green and red emitters are achieved.PMID:34715411 This work demonstrates that through rational materials design of heterostructured InP-based QDs, the inherent brightness mismatch in QDs can be effectively overcome, paving the way for advanced multiplexed applications in biosensing, imaging, and display technologies.MedChemExpress (MCE) offers a wide range of high-quality research chemicals and biochemicals (novel life-science reagents, reference compounds and natural compounds) for scientific use. We have professionally experienced and friendly staff to meet your needs. We are a competent and trustworthy partner for your research and scientific projects.Related websites: https://www.medchemexpress.com