Catalyst‐Free and Morphology‐Controlled Growth of 2D Perovskite Nanowires for Polarized Light Detection

Abstract

Ruddleson–Popper (RP) perovskites have emerged as a class of material inheriting the superior optoelectronic properties of two materials: perovskites and 2D materials. The large exciton binding energy and natural quantum well structure not only make these materials ideal platforms to study light–matter interactions but also render them suitable for fabrication of various functional optoelectronic devices. Nanoscale structuring and morphology control have led to semiconductors with enhanced functionalities. Nanowires of semiconducting materials are extensively used for important applications like lasing and sensing. However, catalyst and template‐free scalable growth of nanowires of 2D perovskites has remained elusive. In this paper, a facile approach for morphology‐controlled growth of nanowires of 2D perovskite, (BA)2PbI4, is demonstrated. Additionally, it is shown that the photoluminescence (PL) from the nanowires is highly polarized with a polarization ratio as large as ≈0.73, which is one of the largest reported for perovskites. It is further shown that the photocurrent from the hybrid nanowire/graphene device is also sensitive to the polarization of the incident light with the photocurrent anisotropy ratio of ≈3.62 (much larger than the previously reported value of 2.68 for perovskites), thus demonstrating the potential of these nanowires as highly efficient photodetectors for polarized light.

Recent Progress of Heterojunction Ultraviolet Photodetectors: Materials, Integrations, and Applications

“…These characteristics strongly recommend the organic–inorganic hybrid perovskites as ideal building blocks for high‐performance PDs. Perovskites with different structures (polycrystalline film,9 single crystal,10 and low‐dimensional nanostructure59)have been synthesized. Together with various device configurations, perovskites‐based devices demonstrate unprecedented progress in photodetecting performance 60.…”

Polarization‐Sensitive Halide Perovskites for Polarized Luminescence and Detection: Recent Advances and Perspectives

“…[25] Subsequently, linearly polarized luminescence based on HPs NCs, [26] NWs, [27,28] NPLs, [29,30] NRs, [31] composites, [32][33][34][35][36][37][38] and highly oriented film [39] were sequentially reported. Meanwhile, linearly polarized light detection was also being implemented in HPs-based single crystals, [40] NWs, [4,41,42] and NPLs. [30] In particular, in 2019, Peng et al [43] first reported a detector based on 2D HPs bulk photovoltaic effect (BPVE), realizing high sensitive detection of linearly polarized light.…”

Giant Optical Anisotropy of Perovskite Nanowire Array Films

“…In addition to 3D cubic perovskite we just mentioned, 2D perovskite is another perovskite family that possesses good polarization property because of its asymmetric layered crystal structure. For example, Ghoshal et al demonstrated a high DOLP of 0.73 from an individual (BA) 2 PbI 4 NW,43 and Ma et al reported polarized PL based on a group of chiral (MBA) 2 PbI 4 microplates with a DOLP of 0.176 44. Compared with perovskite‐based devices in the literature, the printed perovskite NW arrays in this study present the highest DOLP of 0.84, suggesting its potential for polarized light application.…”