Strategies for chemical vapor deposition of two-dimensional organic-inorganic halide perovskites

Ayoung Ham; Tae Soo Kim; Minsoo Kang; Himchan Cho; Kibum Kang

doi:10.1016/j.isci.2021.103486

Strategies for chemical vapor deposition of two-dimensional organic-inorganic halide perovskites

iScience. 2021 Nov 24;24(12):103486. doi: 10.1016/j.isci.2021.103486. eCollection 2021 Dec 17.

Authors

Ayoung Ham¹, Tae Soo Kim¹, Minsoo Kang¹, Himchan Cho¹, Kibum Kang¹

Affiliation

¹ Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea.

Abstract

Two-dimensional (2D) organic-inorganic halide perovskites (OIHPs) with an alternating stacked structure of an organic layer and an inorganic layer draw significant attention for photovoltaics, multiple quantum-well, and passivation of three-dimensional perovskites. Although the low-cost and simple spin-coating process of these materials offers a vast platform to study fundamental properties and help them achieve rapid progress in electronics and optoelectronics, chemical vapor deposition (CVD) growth is also necessary for large-area, epitaxial, selective, and conformal growth. Here, one-step CVD strategies for 2D OIHP growth are proposed, and the growth trends depending on the precursor and substrate conditions are discussed. We report a CVD-grown nontoxic, lead-free 2D tin-OIHP flake to show the system offering a universal route to synthesize perovskite crystals based on arbitrary organic and inorganic components.

Keywords: Applied sciences; Materials synthesis; Nanomaterials.