Khan, Yeasin Ansari, Rasheeda Rahaman, Khandoker Asiqur Walker, Bright Kwon, Jang Hyuk 2025-07-17T07:00:14Z 2025-07-17T07:00:14Z 2025-07-11 2025-11 1613-6810 https://pubs.kist.re.kr/handle/201004/152744 This study explores the synthesis of water-based color-tunable organic nanodots (CTONDs) capable of emitting multiple colors, including white light, by adjusting the molar ratio of blue, green, and red emissive fluorophores in the particles. Spectroscopic analyses reveal that the emissions are due to Forster resonance energy transfer (FRET) between the energy donor and acceptor nanoparticles. The energy transfer efficiencies are high, reaching over 90% in the film state due to the close packing of NDs while in their film state. Various molar ratios produced different colors in both liquid dispersions and in the solid state. These CTONDs demonstrate over 60% color conversion efficiency (CCE) when applied as color conversion layers (CCLs) in light-emitting devices, maintaining photostability for over four months under ambient conditions. Additionally, their aqueous processability and multicolor tunability make them attractive for environmentally friendly display technologies, flexible optoelectronics, and anti-counterfeiting applications such as security inks. This work offers a scalable and sustainable approach to fabricating tunable, solution-processed fluorescent organic nanomaterials and underscores their promise as a versatile platform for next-generation photonic and optoelectronic applications. English Wiley - V C H Verlag GmbbH & Co. Color-Tunable Organic Nano-Dots: Synthesis and Applications in Color Conversion and Security Inks Article 10.1002/smll.202505043 1 Small, v.21, no.46 Small 21 46 N scie scopus 001525577000001 Chemistry, Multidisciplinary Chemistry, Physical Nanoscience & Nanotechnology Materials Science, Multidisciplinary Physics, Applied Physics, Condensed Matter Chemistry Science & Technology - Other Topics Materials Science Physics Article PLATFORM FRET ENERGY-TRANSFER DIIMIDES aqueous dispersion color conversion layer color tunable nanodots energy transfer FRET security ink