Deeper Insights Into the Spin Dynamics, Enhancing Transport Performance, and Emerged Multifunctional Devices: Recent Progress in Organic Spintronics and Materials

Organic spintronics is a rapidly evolving frontier interdisciplinary field because of the significant practical potential in the field of the modern electronics industry. Organic semiconductors (OSCs), which typically exhibit remarkably spin transport performance compared to inorganic counterparts owing to their light elements composing framework, have emerged as a promising platform for the development of multifunctional organic electronic devices. In recent years, as the theoretical framework of organic spin relaxation mechanisms has been further refined, many novel design strategies have been proposed, substantially enhancing the applicability of OSCs in multifunctional spintronics devices. Herein, spin transport dynamics, chemical modulation strategies, and the derivative functional devices are comprehensively summarized in this review. First, the physical pictures of the spin or carrier transport in various OSCs, especially the coupling between spin relaxations and charge or lattice dynamics, are discussed. Subsequently, the design strategies of OSCs aimed at realizing high spin transport performance are classified. Moreover, the progress in the field of several spin-related multifunctional devices, such as spin memristor, spin light emitting diode (spin-LED), spin photovoltaic devices, are presented. Finally, a summary and future outlook are proposed, emphasizing the diversity and potential for long-term development in organic spintronics.