{"id":687185,"date":"2025-08-26T06:15:17","date_gmt":"2025-08-26T03:15:17","guid":{"rendered":"https:\/\/buradabiliyorum.com\/en\/high-binding-energy-material-achieves-record-qled-efficiency-and-lifetime\/"},"modified":"2025-08-26T06:15:17","modified_gmt":"2025-08-26T03:15:17","slug":"high-binding-energy-material-achieves-record-qled-efficiency-and-lifetime","status":"publish","type":"post","link":"https:\/\/buradabiliyorum.com\/en\/high-binding-energy-material-achieves-record-qled-efficiency-and-lifetime\/","title":{"rendered":"High-binding-energy material achieves record QLED efficiency and lifetime"},"content":{"rendered":"
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\n \"DGIST
\n AFM height images (5 \u03bcm \u00d7 5 \u03bcm) of (a) TFB, (b)1-PFDBF, (c) 2-PFDBF (d) 3-PFDBF, and (e) 4-PFDBF films. Credit: Small<\/i> (2025). DOI: 10.1002\/smll.202504867
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A research team has developed a new material that can significantly enhance the lifetime and efficiency of quantum-dot light-emitting diodes (QLEDs), which is a next-generation display technology<\/a>. App<\/a>lying a high-binding-energy organic material, which is resistant to degradation under electrical and thermal stress, to the hole transport layer (HTL) is expected to contribute to developing next-generation QLEDs that can maintain brightness and stability over extended periods.<\/p>\n

The study is published<\/a> in the journal Small<\/i>. The team was led by Professor Youngu Lee in the Department of Energy Science<\/a> and Engineering at DGIST.<\/p>\n

QLEDs have gained attention as next-generation displays thanks to their vivid colors and outstanding power efficiency. However, the commonly used trip<\/a>henylamine-based HTL material has limitations, as its molecular structure is vulnerable to electrical stress, consequently causing device efficiency to deteriorate rapidly over time and resulting in a short lifetime. Although various attempts have been made to address this issue, they often faced a dilemma in which hole mobility and electron-blocking capability were simultaneously degraded.<\/p>\n

To overcome these limitations, Professor Lee’s team developed a new organic HTL material incorporating the stable molecular structure of “dibenzofuran.” This material significantly increases intramolecular binding energy and enhances hole mobility while reducing electron back-leakage and surface defects, thereby improving both the efficiency and stability of QLEDs.<\/p>\n

The team used this material to achieve a high external quantum efficiency (EQE) of 25.7% in green QLED devices. In addition, the device’s lifetime (T\u2085\u2080 at 100 cd m\u207b\u00b2) reached approximately 1.46 million hours, 66 times longer than conventional devices, demonstrating long-term stability. This represents the highest performance among materials based on the same class (triarylamine) reported to date.<\/p>\n

Professor Lee of the Department of Energy Science and Engineering at DGIST stated, “We have overcome the limitations of conventional materials with weak molecular bonds and developed a stable HTL that has dramatically improved the efficiency and lifetime of QLEDs. Moving forward, we will continue to apply high-binding-energy materials to a wide range of applications, including next-generation displays and solar cells.”<\/p>\n

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More information:<\/strong>
\n\t\t\t\t\t\t\t\t\t\t\t\tYoungjun Hwang et al, Boosting Efficiency and Longevity of Quantum Dot Light\u2010Emitting Diodes with Dibenzofuran\u2010Incorporated Hole Transport Materials Featuring High Bond Dissociation Energy, Small<\/i> (2025). DOI: 10.1002\/smll.202504867<\/a><\/p>\n

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\n\t\t\t\t\t\t\t\t\t\t\t\t\tJournal information:<\/strong>
\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\tSmall<\/cite>
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\n\t\t\t\t\t\t\t\t\t\t\t\t\tProvided by
\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\tDaegu Gyeongbuk Institute of Science and Technology
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\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/p>\n<\/p><\/div>\n

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\n\t\t\t\t\t\t\t\t\t\t\t\tCitation<\/strong>:
\n\t\t\t\t\t\t\t\t\t\t\t\tHigh-binding-energy material achieves record QLED efficiency and lifetime (2025, August 25)
\n\t\t\t\t\t\t\t\t\t\t\t\tretrieved 25 August 2025
\n\t\t\t\t\t\t\t\t\t\t\t\tfrom https:\/\/phys.org\/news<\/a>\/2025-08-high-energy-material-qled-efficiency.html\n\t\t\t\t\t\t\t\t\t\t\t <\/p>\n

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