Large‐Scale Transparent Molybdenum Disulfide Plasmonic Photodetector Using Split Bull Eye Structure

Abstract

A high performance photodetector array on transparent substrate is highly sought after for enabling next‐generation imaging technology at the visible wavelengths. 2D materials such as molybdenum disulfide (MoS2) are attractive for such application owing to its superior optoelectronic properties and transparency when scaled to atomic thinness. Here, direct growth of MoS2 on centimeter‐scale transparent Al2O3 substrate is reported using a high yield and scalable chemical vapor deposition approach. This enables a large area photodetector array to be demonstrated, wherein aluminum split bull eye (SBE) plasmonic structure is integrated to achieve further performance boost due to surface plasmon resonance (SPR) effect. For a wavelength of 405 nm, the plasmonic MoS2 detector achieves an ultralow noise equivalent power of ≈6.2 × 10–14 W Hz−1/2 and a high responsivity of 7.26 A W−1 at a small bias of 1.0 V, which is more than 6× larger than the reference detector due to SPR effect. Finite‐difference time‐domain simulation confirms a higher concentration of optical field distribution at the center of the SBE structure, which is responsible for the enhancement of photocurrent and sensitivity even at low‐light condition.

Two‐dimensional heterostructure promoted infrared photodetection devices

“…In recent years, SPR effect‐modified photodetectors have attracted many interest for their enhanced light absorption and detection sensitivity . Wu et al designed 2D + 0D photodetectors based on Ag shell‐isolated nanoparticles (SHIN)‐decorated MoS 2 .…”

“…47 In recent years, SPR effect-modified photodetectors have attracted many interest for their enhanced light absorption and detection sensitivity. 32,[105][106][107][108][109] Wu et al 110 designed 2D + 0D photodetectors based on Ag shell-isolated nanoparticles (SHIN)-decorated MoS 2 . Due to the large localized SPR effect, the PL intensity and photoresponse of the monolayer MoS 2 were dramatically enhanced.…”

High‐Performance Visible‐Light Photodetectors built on 2D‐Nanoplate‐Assembled Large‐Scale BiI3 Films

“…Unfortunately, there always remains a trade‐off between the film size and the performances of the devices on them. In the aspect of photodetectors, most of the devices built on large‐scale films have attenuated qualities comparing with those ones produced on nanoscale samples . For example, the responsivity of the MoS 2 film photodetectors may decay of two orders of magnitude than that of the nanoscale devices .…”

“…For example, the responsivity of the MoS 2 film photodetectors may decay of two orders of magnitude than that of the nanoscale devices . Thus, it still remains a challenge to grow 2DLMs films which guarantee not only large lateral size but also excellent device performances. In view of this, we propose a possible scheme that assembling high‐quality nanolayers (which can ensure outstanding photodetecting capability for the nanoscale detectors processed on them) into a nanostructured film may bring out a win–win result between both sides.…”

Multifunctional Skin‐Inspired Flexible Sensor Systems for Wearable Electronics

“…Optical sensors are a wide range of devices with the capability to detect a variety of light properties, such as wavelength, frequency, intensity, or polarization. One type of devices relies on the conversion of light with broad bandwidth into electrical signals . The performance of the optical sensors can be evaluated by various indicators, including selectivity, sensitivity as well as response time .…”