Thermal and Photo Sensing Capabilities of Mono- and Few-Layer Thick Transition Metal Dichalcogenides

Abstract

Two-dimensional (2D) materials have shown promise in various optical and electrical applications. Among these materials, semiconducting transition metal dichalcogenides (TMDs) have been heavily studied recently for their photodetection and thermoelectric properties. The recent progress in fabrication, defect engineering, doping, and heterostructure design has shown vast improvements in response time and sensitivity, which can be applied to both contact-based (thermocouple), and non-contact (photodetector) thermal sensing applications. These improvements have allowed the possibility of cost-effective and tunable thermal sensors for novel applications, such as broadband photodetectors, ultrafast detectors, and high thermoelectric figures of merit. In this review, we summarize the properties arisen in works that focus on the respective qualities of TMD-based photodetectors and thermocouples, with a focus on their optical, electrical, and thermoelectric capabilities for using them in sensing and detection.

Two-Dimensional MoS2: Structural Properties, Synthesis Methods, and Regulation Strategies toward Oxygen Reduction

“…More importantly, there are unsaturated coordination and dangling bonds at the edges of TMDs nanosheets. These special properties of TMDs nanosheets provide many inspirations for basic research in many fields including catalysis [28][29][30][31][32][33], transistor [34], energy storage [35][36][37][38][39] and sensor [40][41][42]. Among all 2D TMDs, MoS 2 is one of the few with a natural layered structure, indicating that MoS 2 can be stripped to obtain high-quality 2D MoS 2 without complicated chemical synthesis [26].…”

Large Negative Photoresistivity in Amorphous NdNiO3 Film

“…The achievable magnitudes of the photoresistive effect in the amorphous NNO film can be attractive for using in thermal photodetectors [21]. This type of the light detector utilizes the considered principle: it measures temperature rises resulting from the light absorption.…”

“…Such a dependence is typical for thermistors with negative temperature coefficient, i.e., thermally sensitive resistors with negative dR/dT, which are generally made of ceramics or polymers. An important figure of merit for the thermometer layer material is the temperature coef- The achievable magnitudes of the photoresistive effect in the amorphous NNO film can be attractive for using in thermal photodetectors [21]. This type of the light detector utilizes the considered principle: it measures temperature rises resulting from the light absorption.…”

Self-Powered Sensors: New Opportunities and Challenges from Two-Dimensional Nanomaterials

“…These properties allow TMD-based photodetectors to identify both visible and NIR ranges, allowing them to be used in thrusters and active layer components in solar cells. In addition, to control the fine electrical properties of the TMD, its band gap can be adjusted in order to manufacture various electronic devices and long-distance temperature sensors in the NIR region by changing the number of layers of the TMD [ 56 ].…”