Ordered multilayer boron nitride nanosheets for enhancing thermal stability and optical performance of acridine orange

Abstract Organic fluorescent dyes, as non-rare-earth phosphors, are crucial in the field of optoelectronic devices but significantly impeded by inherent strong aggregation-caused quenching effects and low thermal stability. To address these problems, herein, we devise a high-performance organic-inorganic composite phosphor consisting of ordered multilayer boron nitride (BN) nanosheets as a support that simultaneously improves the optical properties and thermal stability of acridine orange (AO). Besides, the emission intensities and colors of BN/AO composite phosphors can be adjusted by controlling AO concentrations and annealing temperature. In particular, the BN/AO composite phosphor displays strong yellow-green emission after 250 °C annealing. These findings offer a new avenue for the establishment of organic-inorganic hybrid luminescent materials.