Abstract
<jats:p>The rapid advancement of science and technology has placed single crystals at the heart of many transformative innovations. Materials in single crystal form enable precise control over physical phenomena that are unattainable in polycrystalline or amorphous systems, making them indispensable for next- generation devices. As research continues to push the boundaries of performance, efficiency, and miniaturisation, the importance of single crystals in enabling reliable and high-functionality technologies continues to grow. Over the years, remarkable progress has been achieved in the synthesis, optimisation, and application of both inorganic and organic single crystals. These developments have led to impactful applications across a broad spectrum of technologies, including laser and nonlinear optical systems, photovoltaic and optoelectronic devices, radiation detection, power electronics, thermoelectric energy conversion, terahertz generation, sensing, and biomedical technologies. The expanding scope of single crystal applications reflects not only advances in crystal growth methodologies but also a deeper understanding of structure–property–performance relationships. This book, Single Crystal Applications, is conceived as a focused platform that brings together diverse application-driven perspectives of single crystals within a single volume. Rather than emphasising growth techniques or characterisation alone, the chapters collectively highlight how single crystals are translated into functional devices and systems. Contributions in this book address key areas such as laser and frequency-conversion crystals, electro- optic and magneto-optical materials, semiconductor single crystals for solar cells and power electronics, metal halide perovskites for X-ray detection and photovoltaics, and functional crystals exhibiting pyroelectric, piezoelectric, and thermoelectric properties.</jats:p>