Highly Efficient Perovskite Color Conversion Devices Via Strong Absorption and Photon Recycling

Quantum-dot (QD) color conversion layers are standard in current display technologies; however, their limited excitation-light absorption requires thick films and additional color filters, leading to cumulative optical losses and complex fabrication. Perovskites present a highly promising solution, offering superior absorption capabilities that facilitate simultaneous color conversion and excitation-light blocking.
  Herein, we demonstrate high-performance perovskite color conversion (PeCC) devices and rigorously analyze their optical characteristics. By correlating experimental data with transfer-matrix formalism (TMF) optical simulations, we confirm that perovskites significantly outperform QDs in suppressing residual excitation at reduced thicknesses.
Additionally, we verify the occurrence of photon recycling within the perovskite layer via time-resolved photoluminescence (TRPL) and elucidate its role in augmenting overall device optics. Ultimately, this work establishes PeCC architectures—driven by intrinsic strong absorption and photon recycling—as a formidable platform for advancing high-resolution color-conversion display technologies.