Recent progress of two‐dimensional lead halide perovskite single crystals: Crystal growth, physical properties, and device applications

Abstract

In recent years, research on organic‐inorganic lead halide two‐dimensional (2D) perovskites has been blossoming. 2D perovskites have completely different layered structures from three‐dimensional perovskites, with interleaved organic and inorganic layers, leading to 2D perovskite materials being more stable and possessing anisotropic electrical transport. Meanwhile, 2D organic‐inorganic lead halide perovskite single crystals are receiving increasing attention because of their remarkable properties, such as long charge carrier lifetime, low defect density, and high photoluminescence quantum yield, increasing their potential for optoelectronic applications. Previously, a series of material systems based 2D perovskites single crystals has been synthesized and applied in various device applications. In this review, the preparation methods of organic‐inorganic lead halide 2D perovskite single crystals, the growth principles, their photoelectric properties and several device applications are discussed.

Enhanced Efficiency and Stability of All‐Inorganic CsPbI2Br Perovskite Solar Cells by Organic and Ionic Mixed Passivation

“…Organic–inorganic hybrid perovskite solar cells (PSCs) have aroused significant interests of many researchers worldwide in the past decade. [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 ] Their inherent superior optoelectronic features have made the power conversion efficiency (PCE) up to the current topmost 25.5% which rivals the commercial monocrystalline silicon solar cells. [ 11 ] Despite the outstanding performance, organic–inorganic hybrid PSCs still suffer stability issues originated from the organic monovalent cations, such as methylammonium (known as MA + or CH 3 NH 3 + ) and formamidinium (knowns as FA + or CH(NH 2 ) 2 + ).…”

Moth eye‐inspired highly efficient, robust, and neutral‐colored semitransparent perovskite solar cells for building‐integrated photovoltaics

“…The carrier lifetime of perovskites and the charge injection from the perovskites to electron quenchers are investigated through the time‐resolved photoluminescence analysis (TRPL). The TRPL measurements Figure 2D reveals a lifetime of 54.48 ns for the neat Cs 0.05 FA 0.83 MA 0.12 PbBr 0.33 I 2.67 , where is the time taken for the PL to plummet to 1/e of its initial intensity 37,38 . The quenching samples were prepared by one‐step spinning coating deposition of Cs 0.05 FA 0.83 MA 0.12 PbBr 0.33 I 2.67 on SnO 2 /planar‐ITO and SnO 2 /MEIS‐ITO, respectively.…”

High‐Resolution Patterned Functionalization of Slippery “Liquid‐Like” Brush Surfaces via Microdroplet‐Confined Growth of Multifunctional Polydopamine Arrays

“…In principle, patterned perovskites with single crystalline, 2D, or self-assembled nanostructures might also be realized using the same approach for optoelectronic devices. [69][70][71] And the dewetting process may provide great promise to generate various arrays of plasmonic, magnetic, or catalytic nanomaterials to functionalize slippery surfaces.…”