Recent developments in 2D materials for energy harvesting applications

Abstract

The ever-increasing demand for energy as a result of the growing interest in applications such as Internet of Things (IoT), and wearable systems etc. call for the development of self-sustained energy harvesting solutions. In this regard, the 2D materials have sparked an enormous interest recently, owing to their outstanding properties such as ultra-thin geometry, high electromechanical coupling, large surface area to volume ratio, tunable band gap, transparency and flexibility. This has unravelled noteworthy advancements in energy harvesters like triboelectric nanogenerator (TENG), piezoelectric nanogenerator (PENG) and photovoltaics (PV) based on 2D materials. This review introduces the properties of different 2D materials including graphene, transition metal dichalcogenides (TMDs), MXenes, black phosphorous (BP), hexagonal boron nitride (h-BN), metal-organic frameworks (MOFs) and covalent organic frameworks (COFs). A detailed discussion of the recent developments in the 2D materials-based PENG, TENG and photovoltaic devices is included. The review also considers the performance enhancement mechanism and importance of 2D materials in energy harvesting. Finally, the challenges and future perspectives are laid out to present a future research direction for the further development and extension of 2D materials-based energy harvesters.

Strain induced modulations in the thermoelectric properties of 2D SiH and GeH monolayers: insights from first-principle calculations

“…The interesting structural and electronic properties of 2D systems thus * Author to whom any correspondence should be addressed. make them potential candidates for advanced optoelectronic devices, bandgap engineering materials, thermoelectric (TE) power generators and in clean and global energy conservations [21][22][23][24][25][26][27].…”

Electron density control in WSe2monolayers via photochlorination

“…Notably, these materials possess a bandgap in the visible region of the optical spectrum [3,4], making them highly attractive for a wide range of applications. By harnessing their unique properties, new opportunities can emerge in the exciting fields of valleytronics [5], twistronics [6], energy harvesting [7], optical sensing [8,9] and nextgeneration excitonic devices [10].…”