Self-Powered Broadband Photodetector using Plasmonic Titanium Nitride

Abstract

We report the demonstration of plasmonic titanium nitride (TiN) for fabrication of an efficient hybrid photodetector. A novel synthesis method based on plasma nanotechnology is utilized for producing air stable plasma polymerized aniline-TiN (PPA-TiN) nanocomposite and its integration in photodetector geometry. The device performs as a self-powered detector that responds to ultraviolet and visible light at zero bias. The photodetector has the advantage of broadband absorption and outcomes an enhanced photoresponse including high responsivity and detectivity under low light conditions. This work opens up a new direction for plasmonic TiN-based hybrid nanocomposite and its exploitation in optoelectronic applications including imaging, light-wave communication and wire-free route for artificial vision.

An Ultrahigh Responsivity (9.7 mA W−1) Self‐Powered Solar‐Blind Photodetector Based on Individual ZnO–Ga2O3 Heterostructures

“…Upon the solar‐blind UV radiation as shown in Figure b, the photogenerated electron‐hole pairs would break the balance and generate a photoinduced voltage. When connecting the positive and the negative electrodes of the device, it would form the current loop driven by the photoinduced voltage, and then the device can act as a self‐powered photodetector . As for the back‐to‐back junction photodetector under light illumination at 0 V, the two reversed photoinduced voltages will be offset, and it is difficult to measure the responsivity under 0 V bias.…”

“…In addition, an external energy supply is usually required to obtain a desirable responsivity, which not only greatly increase the device size and energy consumption but also largely limit their long‐term application in some unmanned hazardous atmosphere or harsh environment. Thus, high performance self‐powered photodetectors operating without an external power source exhibit huge advantages …”

Novel p–p Heterojunctions Self‐Powered Broadband Photodetectors with Ultrafast Speed and High Responsivity

“…The electron affinities (χ) of t‐Se‐MT, PANI, PPy, and PEDOT are taken as 3.2, 2.87, 3.5, and 3.3 eV, respectively . Compared with t‐Se‐MT ( E g = 1.77 eV), p‐type conducting PANI, PPy, and PEDOT have the higher bandgap energies of 2.76 eV, 2.50 eV, and 2.0 eV, respectively. After depositing the conducting organic polymers, there are two type band alignments: type‐I heterojunction of Se/PANI PD and type‐II heterojunction for Se/PPy and Se/PEDOT PD.…”

Enhancement in Performance of Transparent p‐NiO/n‐ZnO Heterojunction Ultrafast Self‐Powered Photodetector via Pyro‐Phototronic Effect

“…Based on this concept, numerous attentions have been driven to fabricate self-powered photodetectors that can work independently of external source. [2,3] Another effort is given to maintain good transparency of the self-powered photodetectors to attain high performance with wireless geometry for see-through optoelectronic devices. [4,5] Wide bandgap inorganic metal oxides are one of the preferred choices because of their excellent environmental stability with good electronic properties.…”