학과 정기세미나 안내

■ 제 목: 자가치유 형광체: 고출력 LED를 위한 새로운 패러다임(Self-healing phosphor: New paradigm for high-power LED lighting)

■ 연 사: 임원빈 교수(전남대학교 신소재공학과 부교수)


■ 일 시: 3월 28일 (화) 16:00


■ 장 소: 응용공학동 (W1) 1층 영상강의실


 내 용: Phosphor-converted white light-emitting diodes (pc-WLEDs) are the efficient light source that has multifarious applications in lighting, high-tech displays, and electronic devices. One of the biggest challenge of pc-WLEDs are the thermal quenching, in which phosphor suffers from emission loss with increasing temperature during high-power LED operation and is an inevitable drawback for any existing phosphor. Here we report for the first time, a new blue-emitting phosphor that doesn’t exhibit thermal quenching revealing zero-emission loss even upto 250ºC. This phenomena of non-thermal quenching, denoted as self-healing phosphor, portrays the ability of phosphor in resurrecting the emission loss and sustaining the luminescence with increasing temperature. This finding would initiate the exploration of many self-healing phosphors with non-thermal quenching for high-power LED applications.