Synthesis of Fibrous Phosphorus Micropillar Arrays with Pyro‐Phototronic Effects

Abstract

The bottom-up preparation of two-dimensional material micro-nano structures at scale facilitates the realisation of integrated applications in optoelectronic devices. Fibrous Phosphorus (FP), an allotrope of black phosphorus (BP), is one of the most promising candidate materials in the field of optoelectronics with its unique crystal structure and properties. [1] However, to date, there are no bottom-up micro-nano structure preparation methods for crystalline phosphorus allotropes. [1c, 2] Herein, we present the bottom-up preparation of fibrous phosphorus micropillar (FP-MP) arrays via a low-pressure gas-phase transport (LP-CVT) method that controls the directional phase transition from amorphous red phosphorus (ARP) to FP. In addition, self-powered photodetectors (PD) of FP-MP arrays with pyro-phototronic effects achieved detection beyond the band gap limit. Our results provide a new approach for bottom-up preparation of other crystalline allotropes of phosphorus.

Interfacial Pyro‐Phototronic Effect: A Universal Approach for Enhancement of Self‐Powered Photodetection Based on Perovskites with Centrosymmetry

“…[1][2][3] To realize high-performance and self-powered photodetection, it is common practice to fabricate heterojunctions or Schottky junctions that possess robust built-in electric fields. Additionally, the modulation of the energy band structure at the interface through physical phenomena, such as the piezo-phototronic effect [4][5][6][7] and pyro-phototronic effect, [8][9][10][11] can significantly enhance photodetection capabilities. And the pyro-phototronic effect is particularly potent, as the light-induced pyroelectric charges can effectively manipulate the built-in electric field.…”

A Review of Phosphorus Structures as CO2 Reduction Photocatalysts

“…[ 51 ] Various different morphological crystalline RP materials were synthesized by CVT method such as large‐size bulk fibrous RP crystals, [ 48 ] crystalline RP nanoribbons, [ 127 ] and fibrous RP micropillar arrays. [ 128 ] The ball milling method was often used for the particle refinement and crystallinity controlling of RP by tuning rotation speeds, treatment time and precursors. The effect of ball milling on the photoresponsivity of RP was investigated, where a greater absorption edge in the visible light range than the commercial RP was proved.…”

Renaissance of elemental phosphorus materials: properties, synthesis, and applications in sustainable energy and environment

“…Recently, Zhang et al have developed a low-pressure CVT approach for the production of centimeter-scale fibrous-P micropillar arrays without the use of transport agents. 306 The approach utilizes directional phase transformation of amorphous red-P at a specific temperature and pressure to generate fibrous-P micropillar arrays by self-assembly. In contrast to traditional transport agent-assisted CVT methods, this approach avoids nucleation aggregation induced by transport agents, paving the way for the bottom–up synthesis of fibrous-P microstructures and nanostructures.…”