The Polymer Society of Korea

Abstract

Quantum-dot (QD)-based color conversion layers (CCLs) are widely commercialized and used in displays; however, due to limited absorption of the excitation light, thick CCLs and additional color filters (CFs) are often required to suppress residual excitation, which can lead to accumulated optical losses and increased process difficulty. In contrast, perovskite color conversion layers, owing to their stronger absorption than QDs, have attracted attention as an alternative that can simultaneously achieve excitation-light blocking and color conversion
In this study, we fabricated perovskite color conversion (PeCC) devices and quantitatively analyzed their optical behavior by comparing experimental results with transfer-matrix formalism (TMF)-based optical simulations. We further compared the absorption behavior of perovskite and QD, confirming that perovskites are more effective at suppressing residual excitation even at reduced thickness under identical conditions. Furthermore, photon recycling in the perovskite color conversion layer was verified via time-resolved photoluminescence (TRPL) measurements, and its effect on the optical characteristics of the color conversion devices was discussed. These results suggest that perovskite color conversion devices, leveraging strong absorption and photon recycling, can serve as a promising material and device platform for high-resolution color-conversion displays.