The 9th Int'l Conference on Semiconductor Physics and Devices (ICSPD 2025) will be held during December 5-7, 2025 in Sanya, China. This Conference will cover issues on Compound Semiconductors, Emerging Semiconductor Technologies, Ferromagnetism / Magnetic Semiconductors, Organic Semiconductors, Photoelectric and Photovoltaic Devices, Physics of Semiconductors and other related topics. The conference is soliciting state-of-the-art research papers in the following areas of interest: Wide-Bandgap Semiconductors Low-Dimensional Semiconductor Physics Quantum Semiconductor Physics Semiconductors for Photonics Carrier Dynamics and Transport Mechanisms Next-Generation Transistors Flexible and Wearable Semiconductors Semiconductor Technologies for 5G and Beyond Neuromorphic and Brain-Inspired Devices Advanced Photovoltaics Semiconductor Sensors Compound Semiconductors Semiconductors in Artificial Intelligence Memory Technologies Advances in Semiconductor Manufacturing and Lithography Device Design and Fabrication Device Performance and Reliability Emerging Semiconductor Technologies Ferromagnetism / Magnetic Semiconductors High Magnetic Fields / High Pressure in Semiconductor Physics Impurities/Defects in Semiconductors Light Emitting Diodes (LEDs) and Diode Lasers Novel Semiconductor Devices and Applications Organic Semiconductors Semiconductor Materials and Applications Semiconductor Processing Semiconductor Spintronics Semiconductor Detectors Other Related Topics