2D PdSe₂: Pioneering innovations in polarized photodetection

Palladium diselenide (PdSe₂), a novel two-dimensional (2D) material with a unique pentagonal crystal structure including anisotropic properties, has emerged as a highly promising candidate for developing the next generation photoelectronic devices. In this review article, firstly, we have shed light key figures of merit for polarization detection. After that, this review mainly highlights the structural and electronic properties of PdSe₂ focusing on its strong polarization sensitivity, tunable bandgap, and excellent environmental stability, making it ideal for developing the photoelectronic devices such as broadband photodetectors and their further applications in polarization detection-based imaging systems. We also discuss challenges in scalable synthesis, material stability, and integration with other low dimensional materials, offering future research directions to optimize PdSe₂ for commercial applications. Owing to the outstanding optoelectronic properties of PdSe₂, it stands at the forefront of optoelectronic materials, poised to enable new innovations in polarization photodetection.