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Related Experiment Video

Updated: May 9, 2025

Fabrication of White Light-emitting Electrochemical Cells with Stable Emission from Exciplexes
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HLCT Driven Twisted Benzo[d]thiazole Based D-A-D Fluorophores for High-Performance, Two-Component White LEDs.

Swetha Maredi1, Diksha Thakur1, Dhruba Jyoti Boruah2,3

  • 1Department of Chemistry, Indian Institute of Technology, Hyderabad, Kandi, Sangareddy, Telangana, 502285, India.

Chemistry, an Asian Journal
|May 6, 2025
PubMed
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Correction: Highly sensitive electrochemical detection of hazardous 2,4-dinitrophenylhydrazine using MgCo-TiO<sub>2</sub>/g-C<sub>3</sub>N<sub>4</sub> heterostructure nanocomposites.

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Highly sensitive electrochemical detection of hazardous 2,4-dinitrophenylhydrazine using MgCo-TiO<sub>2</sub>/g-C<sub>3</sub>N<sub>4</sub> heterostructure nanocomposites.

RSC advances·2025

Researchers developed novel benzo[d]thiazole-based fluorophores for white LEDs. These donor-acceptor-donor systems exhibit tunable emission and improved photoluminescence quantum yield, showing promise for optoelectronic applications.

Area of Science:

  • Materials Science
  • Organic Chemistry
  • Optoelectronics

Background:

  • Tailored fluorophore design is crucial for advanced optoelectronic devices like white LEDs.
  • Donor-acceptor (D-A) systems offer tunable photophysical properties for light emission applications.

Purpose of the Study:

  • To design, synthesize, and characterize novel benzo[d]thiazole-based donor-acceptor-donor (D-A-D) fluorophores.
  • To evaluate the potential of these synthesized luminogens as phosphors for white light-emitting diodes (LEDs).

Main Methods:

  • Synthesis of three D-A-D luminogens incorporating triphenylamine, diphenylamine, and carbazole donor units.
  • Characterization using single-crystal X-ray diffraction, photophysical property measurements (solvatochromism, lifetime studies), and Density Functional Theory (DFT) calculations.
Keywords:
Donor‐π‐acceptor systemHybridized local charge transfer (HLCT)Natural transition orbital (NTO)Two‐component white LED

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  • Fabrication and testing of white LED devices incorporating the synthesized luminogens with a red-emitting Europium(III) phosphor.

    • Main Results:

    • Synthesized D-A-D systems exhibited twisted molecular geometries, leading to greenish-blue emission.
    • Photophysical studies indicated hybridized local and charge transfer (HLCT) character in the excited states.
    • The fabricated white LED demonstrated a color rendering index (CRI) of 74, excellent chromaticity coordinates, and a high correlated color temperature (CCT) of 7207 K.
    • An enhanced absolute photoluminescence quantum yield (PLQY) of 46.33% was achieved with an additional diphenylamine donor unit.

    Conclusions:

    • The synthesized benzo[d]thiazole-based D-A-D systems are efficient fluorophores with tunable emission properties.
    • These materials show significant potential for applications in optoelectronics and next-generation lighting technologies.
    • Molecular design strategies, such as incorporating specific donor units, can enhance luminescent properties for LED applications.