Chip-scale integration of photonic devices plays an important role in the Internet-of-Things (IoT) era by enabling energy-efficient optical communications as well as optical sensing with a high sensitivity. Various materials have been utilized for discrete photonic devices, and as a result, several platforms of materials, such as Si, III-V, glass, and flexible substrates, have been independently examined for monolithic/hybrid integrations of photonic devices on a small chip. Although significant progress has been achieved in each of the platforms, discussions are mostly limited to within specific material systems. The symposium will bring together researchers working on a diverse range of photonic material systems (group-IV semiconductors, III-V compound semiconductors, chalcogenides, oxides, graphene, organic materials etc.), and provide a cross-disciplinary forum to share latest research progress with the aim of expanding the material repertoire towards next-generation photonic integration for higher-performance optical communication and optical sensing applications.