Photodetectors Based on Micro-nano Structure Material

Abstract

Photodetectors converting optical signals into electrical signals have been widely utilized and have received more and more attention in scientific research and industrial fields including optical interconnection, optical communication, and environmental monitoring. Herein, we summarize the latest development of photodetectors with different micro-nano structures and different materials and the performance indicators of photodetectors. Several photodetectors, such as flexible, ultraviolet two-dimensional (2D) microscale, and dual-band photodetectors, are listed in this minireview. Meanwhile, the current bottleneck and future development prospects of the photodetector are discussed.

Tuning Ultrafast Carrier Dynamics and Broadband Photo-Response of High-Performance Sb2Se3 Thin Film Photodetectors: A Substrate Dependent Study

“…By comparing the photoresponsive behavior in relation to thickness, morphology, and surface matching conditions, it is observed that the thickness of the deposited thin films is consistent across the all samples, indicating that thickness does not impact the generation of photocarriers. However, the morphological features, including micro and nanostructures, play a crucial role in generating photocurrent. , Since the morphology of the film is uniform for all other substrates, it does not create much change in the photocurrent, except for structural sapphire, where pyramidal structures affect the light absorption in each regime. The third reason is the formation of trap and defect states, which is highlighted in the case of Al 2 O 3 .…”

“…However, apart from these intriguing properties, the substrate used in these devices plays a crucial role in the device fabrication. Surface morphology, surface modification by micronano structuring, − and the surface matching condition may highly influence the photocarriers and their broadband response. , There are numerous reports on photocarriers and their high wideband response with Sb 2 Se 3 . However, as far as we know, no studies have been reported to show substrate-dependent performance and response of the devices.…”

Recent advances in inkjet-printing technologies for flexible/wearable electronics

“…Photoelectric detectors convert incident photons into electrical signals and are used in a wide range of scientific research and industrial applications such as optical interconnections, optical communications, and environmental monitoring. 122–125…”

“…Photoelectric detectors convert incident photons into electrical signals and are used in a wide range of scientific research and industrial applications such as optical interconnections, optical communications, and environmental monitoring. [122][123][124][125] As an innovative preparation process, inkjet printing demonstrates a great advantage in fabricating flexible photodetectors, due to its merits such as effectiveness in materials, free of the mask, and patterned deposition, [126][127][128][129][130][131][132][133][134][135][136] endowing it excellent mechanical properties overcome its rigid counterparts.…”

A facile covalent strategy for ultrafast negative photoconductance hybrid graphene/porphyrin-based photodetector

“…Photodetectors have a wide range of applications in spectroscopy, telecommunication, astronomy, pharmaceuticals and environmental monitoring [1][2][3][4][5][6]. Exposure of semiconductors to light with energy larger than band gap generates excess mobile charges (electrons or holes) in the conduction or valence bands and leads to an increase or decrease in electrical conductivity of the semiconductors, it can be divided into two types: positive photoconductance (PPC) or negative photoconductance (NPC) [7].…”