Low-dimensional templates and delayed crystallization for high-quality tin-based perovskite films and high-performance transistors.

ABSTRACT: Quasi-2D tin-based perovskites are promising p-type semiconductors due to their thermodynamic stability and suppressed ion migration tendencies. However, the competitive growth of low- and high-dimensional phases leads to pronounced structural disorder, increased defect density, and poor crystallographic orientation, thereby restricting charge transport. Here, phenethylammonium thiocyanate (PEASCN) is incorporated into the precursor to promote the preferential formation of PEA₂FA_n-1Sn_nI_3n-1SCN₂ (n = 2) templates. Substituting formamidinium iodide (FAI) with formamidinium formate (FAHCOO) and ammonium iodide (NH₄I) suppresses the uncontrollable growth of 3D FASnI₃ at room temperature, enabling precise crystallizati

SUBMITTER: Wu Y 

PROVIDER: S-EPMC12569074 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature