Formation of Hybrid Perovskite Tin Iodide Single Crystals by Top‐Seeded Solution Growth

Abstract

Hybrid perovskites have generated a great deal of interest because of their potential in photovoltaic applications. However, the toxicity of lead means that there is interest in finding a nontoxic substitute. Bulk single crystals of both cubic CH3NH3 SnI3 and CH(NH2)2 SnI3 were obtained by using the top-seeded solution growth method under an ambient atmosphere. Structural refinement, band gap, thermal properties, and XPS measurements of CH3NH3 SnI3 and CH(NH2)2 SnI3 single crystals are also reported in detail. These results should pave the way for further applications of CH3NH3 SnI3 and CH(NH2)2 SnI3.

Heterojunction‐Depleted Lead‐Free Perovskite Solar Cells with Coarse‐Grained B‐γ‐CsSnI3 Thin Films

“…The use of lead-containing substances in electronic devices is severely restricted by the European Union and other countries, motivating the development of lead-free PSCs. [16] The aforementioned considerations provide the rationale for the investigation of CsSnI 3 material as a promising thermally stable, lead-free perovskite for next generation PSCs. Second, it has been suggested that the fragmentation of the organic component (e.g., MA + or FA + ) in those hybrid perovskites may make them intrinsically unstable for long-term outdoor applications of PSCs.…”

Multichannel Interdiffusion Driven FASnI3 Film Formation Using Aqueous Hybrid Salt/Polymer Solutions toward Flexible Lead‐Free Perovskite Solar Cells

“…[16,23] Some have reported more stable devices employing [(NH 2 ) 2 CH]SnI 3 (FASnI 3 ), which presumably results from the enhanced interaction between Sn 2+ and larger sized FA + , making FASnI 3 an attractive candidate. [19,20,24] Mesoporous titanium dioxide (TiO 2 ) scaffold layers have been used to demonstrate Sn-based perovskite solar cells. [13][14][15][16][17]19,20] However, high-temperature (>450 °C) is required for preparing mesoporous TiO 2 scaffold structure.…”

“…[19,20,24] Mesoporous titanium dioxide (TiO 2 ) scaffold layers have been used to demonstrate Sn-based perovskite solar cells. [19,20,24] Mesoporous titanium dioxide (TiO 2 ) scaffold layers have been used to demonstrate Sn-based perovskite solar cells.…”

Local temperature reduction induced crystallization of MASnI3 and achieving a direct wafer production

“…1b) that is common for general MAPbI 3 /MASnI 3 perovskite crystals. 26,28 More pictures of the MASnI 3 wafers are provided in Fig. S1.…”

“…The MASnI 3 shows strong absorption across the entire visible spectrum and therefore it is seen as black in color. The band gap value was estimated on the basis of the Tauc plot as the intercept value of the plot of (ahn) 1 28 The obtained MASnI 3 exhibits PL peak at 930 nm as shown in Fig. 5b.…”