Self-powered ultraviolet/visible photodetector based on graphene-oxide via triboelectric nanogenerators performing by finger tapping

Abstract

Self-sufficient power sources provide a promising application of abundant electronic devices utilized in detection of ambient properties. Recently, triboelectric nanogenerators (TENGs) have been widely investigated to broaden the self-powered systems by converting the ambient mechanical agitations into electrical voltage and current. Graphene oxide (GO), not only for sensing applications but also as a brilliant energy-related nanomaterial, provides a wide range of controllable bandgap energies, as well as facile synthesis route. In this study, GO-based self-powered photodetectors have been fabricated by conflating the photosensitivity and triboelectric characteristics of freestanding GO paper. In this regard, photodetection via TENGs has been investigated in two forms of active and passive circuits for ultraviolet (UV) and visible illumination. The photodetector responsivity upon UV enhanced from 0.011 mA/W for conventional GO-photoresistors up to 13.41 mA/W by active photodetection setup. Moreover, applying the active-TENG improved the efficiency from 0.25% (in passive TENG) to 4.21%. Our findings demonstrate that active TENGs might enable materials with insignificant optical response to represent considerably higher light-sensitivity by means of synergizing the effect of TENG output changes with opto-electronical properties of desired layers.

Scalable and cost-effective fabrication of high-performance self-powered heterojunction UV-photodetectors using slot-die printing of triple-cation lead perovskite coupled with triboelectric nanogenerators

“…Furthermore, the current amplitude of the TiO 2 /TCHMP also increases under light illumination due to the reduction in the photodetector's resistance. The synergy between the TENG's properties and the current amplitude in the circuit results in improved performance of the self-powered PD coupled with the TENG, as reported recently by Ejehi et al [46]. In practical scenarios, random motions with diverse frequencies and forces lead to variations in output pulses, impacting the sensor's performance.…”

“…This challenge is inherent to all pulsed output NGs. Nonetheless, certain circuitry solutions are available to convert these pulsed outputs to DC [37,46]. To achieve this objective, we can connect the output of the compact NG to an electrolytic capacitor.…”

Reduced Graphene Oxide/Se Microtube p–p Heterojunction for Self-Powered UV–NIR Broadband Photodetectors

“…The characteristic peak of RGO is missing in the Se/RGO because of its relatively low intensity. In the UV–vis–IR absorption spectrum (Figure d), GO demonstrates a strong absorption at 236 nm, while the RGO is shifted to 263 nm because of the reduction of the CO bond and the skeleton vibration of the benzene ring . The band gaps of GO, RGO, and Se-MT are 2.29, 1.02, and 1.65 eV, calculated by the Tauc plots (Figure S3).…”

Triboelectric Nanogenerator‐Enabled 3D Microporous Polydimethylsiloxane–Graphene Oxide Nanocomposite for Flexible Self‐Powered Humidity Sensing Applications

“…The intermolecular interactions and potent van der Waals forces between individual GO nanosheets, characterized by a substantial surface area and high aspect ratio, lead to pronounced aggregation and cluster formation. [42,43] This occurrence results in nonuniform clusters embedded in the polymer matrix, curtailing the effective surface area available for moisture absorption by GO. [42] Consequently, the hydrophilic efficacy of GO diminishes at elevated weight percentages, impacting its positive contribution to sensor performance, particularly in high humidity levels.…”