Analytical Characterization of Quantum Dot Enhancement Films in Commercial Displays

ABSTRACT Colloidal quantum dots (QDs) have become firmly established in the display market, yet many relevant QD compositions contain heavy metals whose concentrations are regulated in consumer products. Accurate characterization of hazardous metal content in QD displays is therefore essential but challenging due to their complex multilayer structure. Here, a commercially available QD display film is analyzed using complementary techniques, with laser ablation inductively coupled plasma mass spectrometry (LA‐ICP‐MS) as the central tool. The film contains CdSe‐based core‐shell QDs as the green component and, for the first time in a commercial product, lead halide perovskite (LHP) QDs as the red component. Principal component analysis combined with k‐means clustering enabled the extraction of bead‐like pixel populations corresponding to CdSe and LHP QDs, with classification accuracies of 84% and 95%, respectively. This approach establishes a pathway toward advanced analytical strategies for assessing the regulatory compliance of commercial QD displays.