수 원자층 두께의 전이금속 칼코겐화물 이차원 반도체 소재는 스위칭 소자 등에 활용하기에 적합한 밴드갭 에너지를 가지며, 높은 이동도와 우수한 광반응성으로 인해 최근 큰 관심을 끌고 있다. 특히 이차원 소재이므로 dangling bond가 없다는 점, 구조적 안정성, 실리콘에 뒤지지 않는 고이동도, 직접천이 특성 등으로 인해 차세대 전자소자용, 더 나아가 실리콘 반도체 대체 소재로써의 가능성도 점쳐지고 있다. 본고에서는 전이금속 칼코겐화물 이차원 반도체의 소재 특성과 제조방법, 소자 응용면에서의 기술개발 동향, 시장전망 등에 대해 소개하고, 이 소재가 현재 기대하는 만큼 중요하게 활용되고 기술이 발전하기 위해서 반드시 해결해야 할 숙제 등에 대해 논의하고자 한다.
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