Self‐Template‐Directed Synthesis of Porous Perovskite Nanowires at Room Temperature for High‐Performance Visible‐Light Photodetectors

Abstract

The unique optoelectronic properties and promising photovoltaic applications of organolead halide perovskites have driven the exploration of facile strategies to synthesize organometal halide perovskites and corresponding hybrid materials and devices. Currently, the preparation of CH3 NH3 PbBr3 perovskite nanowires, especially those with porous features, is still a great challenge. An efficient self-template-directed synthesis of high-quality porous CH3 NH3 PbBr3 perovskite nanowires in solution at room temperature using the Pb-containing precursor nanowires as both the sacrificial template and the Pb(2+) source in the presence of CH3 NH3 Br and HBr is now presented. The initial formation of CH3 NH3 PbBr3 perovskite layers on the surface of the precursor nanowires and the following dissolution of the organic component of the latter led to the formation of mesopores and the preservation of the 1D morphology. Furthermore, the perovskite nanowires are potential materials for visible-light photodetectors with high sensitivity and stability.

Hybrid Organic–Inorganic Perovskite Photodetectors

“…Recently, several groups have reported the successful fabrication of 1D perovskite nanostructures and their applications in photodetectors. In this section, we will provide a summary of low‐dimensional perovskite nanostructure‐based photodetectors …”

In Situ Growth of 120 cm2 CH3NH3PbBr3 Perovskite Crystal Film on FTO Glass for Narrowband‐Photodetectors

“…In addition, the perovskite SCs are expected to possess simultaneously higher thermostability and humidity stability than PC films, which are in favor of both commercial and practical applications. [24,25] Although large-sized CH 3 NH 3 PbI 3 and CH 3 NH 3 PbBr 3 SCs [26] with millimeter or centimeter in thickness have already been prepared, the device based on perovskite SC is rarely reported because of the significant challenges to slice and fabricate electrode on the fragile perovskite crystals.Perovskite SC device is conventionally realized by one of three approaches: (1) by preparing thin metal electrodes such as 25 nm Au [13] or 20 nm Pt [27] on the illuminated side of perovskite SC, (2) by depositing two Au electrodes with a slit at the same side of perovskite SC, [28] (3) by growing perovskite crystal in situ on transparent conductive substrate (indium tin oxide, ITO glass) directly. Recently, several methods have been explored to synthesize low trapstate perovskite SCs such as antisolvent vapor-assisted crystallization, [22] classical cooling method, [21] top-seeded solutiongrowth method, [4] and inverse temperature crystallization, [23] which differentiate from the fabrication methods of perovskite PC thin films [7] and nanostructures.…”

Exploring a Polar Two‐dimensional Multi‐layered Hybrid Perovskite of (C5H11NH3)2(CH3NH3)Pb2I7 for Ultrafast‐Responding Photodetection

“…Motivated by the breakthrough development of three‐dimensional (3D) MAPbI 3 (MA = CH 3 NH 3 ), two‐dimensional (2D) layered organic‐inorganic hybrid perovskites (OIHPs) have also taken a promising position in the optoelectronic field . For these 2D layered OIHPs, the inorganic frameworks comprised of metal‐halide octahedra contribute greatly to their intriguing semiconducting properties, while organic components account for advantages of structural diversity and easy fabrication process .…”