[19p-E308-1~13] 17.3 層状物質

▼ [19p-E308-1] Large-Area 2D Heterostructures of Perovskite amd WS₂

〇(D)Ufuk Erkilic¹、Hyungoo Ji¹、Pablo Solis-Fernandez¹、Keisuke Shinokita²、Yung-Chang Lin³、Kazu Suenaga³、Susumu Okada⁴、Kazunari Matsuda²、Hiroki Ago¹ (1.Kyushu Univ.、2.Kyoto Univ.、3.AIST、4.Univ. Tsukuba)

キーワード：perovskite, TMDC, heterostructure

Recently, hybrid organic-inorganic perovskites have attracted great attention in photovoltaic applications due to their exceptional properties, such as high optical absorption, strong luminescence, and tunable bandgap. Thus, heterostructures of perovskites with other 2D materials can offer exciting new phenomena and expand the properties of the constituents. However, because of their solubility in common solvents conventional lithography and transfer techniques are not applicable to perovskites to realize complicated heterostructures. Here, by using tungsten disulfide (WS₂) as an effective template and strictly controlling the deposition conditions, we demonstrate the selective and epitaxial growth of 2D lead iodide (PbI₂) on monolayer WS₂ and successive vapor-phase conversion to 2D perovskite/WS₂ heterostructure.