Chloroplast-Inspired Carrier Circulation for Improved Photoelectrochemical Photodetectors Based on Ti₂CT_x Nanosheets

Abstract

Here, a photoelectrochemical (PEC) photodetector with good flexibility and high photoresponsivity was successfully fabricated in a vertical structure, where the MXene (Ti2CT x ) nanosheet and carbon black electrode were separated by adenosine triphosphate/nicotinamide adenine dinucleotide phosphate (ATP/NADPH)-incorporated solid-state electrolyte. The photocurrent and photoresponsivity can reach 1.84 μA/cm2 and 8.89 μA/W, respectively, under a light intensity of 90 mW/cm2 at a bias potential of 0.6 V, which are approximately 2.3 times those of Ti2CT x nanosheets. The addition of ATP and NADPH to the electrolyte also leads to a large decrease of the rise time from 0.76 to 0.26 s. Furthermore, the photodetector can continue to function and maintain stability under 45° bending and after 500 cycles of bending, indicating a robust device structure and great flexibility. The performance enhancement of the PEC photodetector can be attributed to the synergistic effect of electrolyte additives on Ti2CT x nanosheets, where ATP and NADPH greatly enhance the circulation and utilization of photogenerated carriers. This work suggests that the incorporation of chloroplast-inspired carrier circulation with two-dimensional nanosheets could achieve efficient light-current conversion, providing a new strategy to improve the performance of PEC-type photodetectors.

Mist Chemical Vapor Deposition of Bi13S18I2 for Photoelectrochemical-type Photodetection

“…Compared to the other inorganic materials including the bismuth-based and other well-investigated 2D material-based PEC-type photodetectors, the Bi 13 S 18 I 2 PEC-type photodetector exhibited much superior photodetection performance in terms of responsivity and response time (Table S2). ,− One possibility for the excellent performance might be derived from the high quality, including high purity, continuous surface morphology, and relatively strong adhesion of the films on the substrate, of Bi 13 S 18 I 2 thin films synthesized by mist CVD.…”

Biomimetic Electrolyte-Induced Photogenerated Charge in TeSe Nanorods for Flexible Photoelectrochemical Photodetectors

“…For the photodetector's counter electrode, a homogeneous blend of 0.5 mg conductive carbon black was dissolved in 1 mL of NMP solution. 8 The subsequent steps were identical to those used to create the anode electrode. The flexible ITO electrode pairs were then dried for 12 h at 60 °C in a vacuum oven before being stored for subsequent usage.…”

“…Due to their unique structure and properties, low-dimensional materials, including two-dimensional 1 (2D), one-dimensional (1D), and zero-dimensional (0D) materials, have significant potential for use in electrical and optoelectronic applications. 2−5 In particular, 1D (such as nanowires and nanorods) and 2D 6 (such as transition-metal dichalcogenides and MXenes 7,8 ) materials have shown excellent performance in flexible devices, field-effect transistors, and photodetectors. 9−12 Nanostructured Te and Se, as well as their heterojunctions and alloys, are a novel class of low-dimensional materials that have enormous promise for use in photodetectors, laser therapy, and energy storage and conversion.…”

“…Due to their unique structure and properties, low-dimensional materials, including two-dimensional (2D), one-dimensional (1D), and zero-dimensional (0D) materials, have significant potential for use in electrical and optoelectronic applications. − In particular, 1D (such as nanowires and nanorods) and 2D (such as transition-metal dichalcogenides and MXenes , ) materials have shown excellent performance in flexible devices, field-effect transistors, and photodetectors. − Nanostructured Te and Se, as well as their heterojunctions and alloys, are a novel class of low-dimensional materials that have enormous promise for use in photodetectors, laser therapy, and energy storage and conversion. − Te-based multidimensional nanomaterials, such as 0D nanodots, 1D nanoneedles, nanowires or nanorods, and 2D nanosheets, are easily made thanks to their distinct chemical synthesis process. , TeSe nanorods exhibit distinctive carrier kinetics within the visible-light region, manifested in multiple relaxation periods and responses. Their remarkable effectiveness in segregating photoexcited electron–hole pairs and their prolonged carrier lifetime enable precise control over this separation process, thereby boosting the efficacy of photoelectric conversion.…”

Self-Powered Quasi-Solid-State Photoelectrochemical Photodetectors Based on MXene Paper Modified by ZnO Nanostructured Architecture

“…In another work, MXene nanosheets were utilized as photoanodes to construct a PEC-type PD having fast response and decay times of 1.26 and 3.27 s, respectively . Yu et al reported that an MXene nanosheet and a conductive carbon black electrode were used to prepare a solid-state PEC-type PD device with adenosine triphosphate/nicotinamide adenine dinucleotide phosphate incorporation into an ionic gel electrolyte …”