Graphene-black phosphorus printed photodetectors

Abstract

Layered materials (LMs) produced by liquid phase exfoliation (LPE) can be used as building blocks for optoelectronic applications. However, when compared with mechanically exfoliated flakes, or films prepared by chemical vapor deposition (CVD), LPE-based printed optoelectronic devices are limited by mobility, defects and trap states. Here, we present a scalable fabrication technique combining CVD with LPE LMs to overcome such limitations. We use black phosphorus (BP) inks, inkjet-printed on graphene on Si/SiO$_{2}$, patterned by inkjet printing based lithography, and source and drain electrodes printed with an Ag ink, to prepare photodetectors (PDs). These have an external responsivity (R$_{ext}$)$\sim$337A/W at 488nm, and operate from visible ($\sim$488nm) to short-wave infrared ($\sim$2.7$\mu$m, R$_{ext}\sim$48mA/W). We also use this approach to fabricate flexible PDs on polyester fabric, one of the most common used in textiles, achieving R$_{ext}\sim$6mA/W at 488nm for an operating voltage of 1V. Thus, our combination of scalable CVD and LPE techniques via inkjet printing is promising for wearable and flexible applications

Phyllosilicates as earth-abundant layered materials for electronics and optoelectronics: Prospects and challenges in their ultrathin limit

“…63 Given that, employing LPE to create insulating layers for electronic and optoelectronic devices poses a challenge due to the inherent characteristics of this technique. 64,65 For non-expandable phyllosilicates, an intercalation or ion exchange step may be necessary to increase yield before performing LPE. 66 The behavior of minerals with surface charges differs depending on the charge site.…”

Exploring the effect of the covalent functionalization in graphene-antimonene heterostructures

“…Indeed, combinations like hBN/TMD, 6 TMD/TMD, 7–9 Ti 2 C/Ta 2 C, 10 or a blend of a multielemental 2D material with a monoelemental one, such as hBN/graphene, 11,12 TMD/graphene, 13–20 or TMD/phosphorene 21 have showcased the potential of these artificial hybrids, pushing the limits of new materials. However, the experimental studies involving heterostructures formed by two monoelemental 2D materials are scarcer, 22–27 computational ones being the most abundant. In this regard, graphene is probably the most studied 2D building block and its reactivity is well stablished in the literature.…”

A mixed-dimensional quasi-1D BiSeI nanowire-2D GaSe nanosheet p–n heterojunction for fast response optoelectronic devices

“…7 In recent years, various types of photodetectors built from different 2D materials have been designed, including graphene, black phosphorus, hexagonal boron nitride, transition metal dichalcogenides, and highly stable oxide perovskites, as well as many ternary sulfide compounds. 8–16 Benefiting from the excellent mechanical properties of 2D materials, the flexible 2D materials can be easily integrated with other 2D materials by versatile facile exfoliation and transfer strategies, leading to various types of van der Waals (vdW) heterojunctions. The ability to engineer the band structures and excitonic states of 2D materials in vdW heterojunctions greatly enhances the optoelectronic performances of photodetectors.…”