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A Copper Iodide Cluster-Based Coordination Polymer as an Unconventional Zero-Thermal-Quenching Phosphor
Huixian Miao1, Xiancheng Pan2, Miao Li1
1Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, Advanced Catalysis & Green Manufacturing Collaborative Innovation Center, School of Petrochemical Engineering, Changzhou University, Changzhou 213164, Jiangsu, P. R. China.
This study introduces a novel metal-halide cluster phosphor that overcomes thermal quenching in white light-emitting diodes (pc-wLEDs). This phosphor maintains high photoluminescence efficiency at elevated temperatures, improving LED performance.
Area of Science:
- Solid-state lighting
- Materials science
- Photoluminescence
Background:
- Phosphor-converted white light-emitting diodes (pc-wLEDs) are key for advanced lighting and displays.
- Conventional phosphors exhibit significant thermal quenching (TQ), reducing efficiency at high temperatures.
Purpose of the Study:
- Investigate a novel metal-halide cluster-based phosphor with dynamic Cu-Cu interactions.
- Develop a phosphor resistant to photoluminescence thermal quenching for improved pc-wLEDs.
Main Methods:
- Utilized temperature-dependent structural analysis.
- Employed solid-state and in situ NMR spectroscopy.
- Fabricated and tested pc-wLED devices with the novel phosphor.
Main Results:
- The phosphor demonstrated resistance to TQ up to 100 °C due to weakening Cu-Cu interactions.
- Weakening Cu-Cu interactions induced a transition from bonding to nonbonding electronic states.
- pc-wLEDs showed rapid brightness increase at 1000 mA and a high color rendering index (90).
Conclusions:
- A novel cluster-based phosphor with dynamic intermetallic interactions was established.
- This phosphor design offers a pathway to overcome thermal quenching in pc-wLEDs.
- The findings enable the development of high-performance, thermally stable pc-wLEDs.
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