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Blue-hazard-free Candlelight OLED
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Stable zero-dimensional hybrid indium-based halides with yellow to orange light emission
Hong-Zhao Zan1,2, Xiao-Zhong Wang2, Hai-Xin Zhao2
1School of Physical Science and Technology, State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, Guangxi Key Laboratory of Processing for Non-ferrous Metals and Featured Materials, Guangxi University, Nanning 530004, China.
Dalton Transactions (Cambridge, England : 2003)
|September 2, 2025
Summary
Researchers developed three lead-free, low-dimensional organic-inorganic hybrid materials (OIHMs) for luminescence applications. These stable, non-toxic materials exhibit high photoluminescence quantum yield and potential for white light-emitting diodes (LEDs).
Area of Science:
- Materials Science
- Inorganic Chemistry
- Optoelectronics
Background:
- Lead-based halides dominate luminescence applications but pose toxicity and stability issues.
- Developing lead-free alternatives is crucial for industrial and environmental safety.
Purpose of the Study:
- To synthesize and characterize novel, low-dimensional, lead-free organic-inorganic hybrid materials (OIHMs).
- To evaluate their luminescent properties, stability, and potential for optoelectronic applications.
Main Methods:
- Synthesis of three 0D In-based OIHMs: (ABI)3(InBr6)Br, (DMA)4(InBr6)Br, and (BAPP)(InBr6)Br·6H2O.
- Photoluminescence spectroscopy to determine emission peaks and photoluminescence quantum yield (PLQY).
- Stability tests involving immersion in organic solvents and application in white light-emitting diodes (LEDs).
Main Results:
- Synthesized three novel 0D In-based OIHMs with emission peaks between 605-622 nm.
- Achieved a maximum photoluminescence quantum yield (PLQY) of 60.80%.
- Demonstrated excellent structural stability in organic solvents and successful fabrication of white LEDs with a high color rendering index (CRI) of 90.3.
Conclusions:
- The developed lead-free OIHMs offer a promising alternative to toxic lead-based materials.
- These materials exhibit high luminescence efficiency and stability, suitable for optoelectronic devices.
- This research provides new strategies for designing advanced lead-free optoelectronic materials.
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