Abstract

MXenes are a new family of two-dimensional transition metal carbides and nitrides discovered in 2011. The first-ever MXene discovered was titanium carbide and synthesized via hydrofluoric acid etching procedure. Since then, researchers have been focusing on their different synthesis routes to derive MXenes with different surface compositions, which aids in harnessing their unique properties and various applications. MXenes have emerged as a two-dimensional metallic material with good ionic conductivity, hydrophilic property due to surface terminations such as hydroxyl or oxygen-terminating surfaces, and mechanical flexibility. This chapter will discuss their classification, synthesis, and characterization of MXenes, along with their applications in solar cell devices. MXenes have several unique properties that allow them to work on various platforms. Due to this, MXene has been exploited in solar cell devices as electrode material, additive in various layers of solar cell devices, and as a hole transport material or electrode transport layer due to its broad range of work functions. Future issues associated with the application of MXenes have also been examined to understand their feasibility and characteristics better.

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