Efficient and Stable Deep-Blue 0D Copper-Based Halide TEA₂Cu₂I₄ with Near-Unity Photoluminescence Quantum Yield for Light-Emitting Diodes.

ABSTRACT: Achieving deep-blue light with high color saturation remains a critical challenge in the development of white light-emitting diode (LED) technology, necessitating luminescent materials that excel in efficiency, low toxicity, and stability. Here, we report the synthesis of [N(C₂H₅)₄]₂Cu₂I₄ (TEA₂Cu₂I₄) single crystals (SCs), which exhibit deep-blue photoluminescence (PL) at 450 nm. These crystals are characterized by a significant Stokes shift of 180 nm, a long lifetime of 1.7 μs, and an impressive photoluminescence quantum yield (PLQY) of 96.7% for SCs and 87.2% for polycrystalline films. The zero-dimensional structure is attributed to the proper spacing of triangular inorganic units [Cu₂

SUBMITTER: Yuan F 

PROVIDER: S-EPMC11643752 | biostudies-literature | 2024 Nov

REPOSITORIES: biostudies-literature