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청색 마이크로 LED의 광 추출 효율에 미치는 칩 크기 의존성 연구
출처
한국전기전자재료학회
발행일
2019-01-15
분야분류
IT소재부품, 해외동향, 전자정보디바이스, LED, IT부품정보, IT부품정보 네트워크, 부품, GreenIT,
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Micro-LEDs show lower efficiencies compared to general LEDs having large areas. Simulations were carried out using ray-tracing software to investigate the change in light extraction efficiency and light distribution according to chip-size of blue flip-chip micro-LEDs (FC μ-LEDs). After fixing the height of the square FC μ-LED chip at 158 μm, the length of one side was varied, with dimensions of 2, 5, 10, 30, 50, 100, 300, and 500 μm. The highest light-extraction efficiency was obtained at 10 μm, beyond which the efficiency decreased as the chip-size increased. The chip size-dependence of the FC μ-LEDs both without the patterned sapphire substrate, as well as vertical FC μ-LEDs, were analyzed.