Optoelectronic conversion plays a vital role in technologies that convert electrical energy into light energy. Next-generation of functional materials are being used to form core components for achieving high-efficiency optoelectronic conversion devices. Researchers have adopted modulation strategies such as dimensional control, element doping, interface regulation, defect engineering, and structural engineering for the design and development of various emerging types of optoelectronic functional materials—including two-dimensional semiconductors, perovskites, and organic molecules—for the application in the fields such as optoelectronic detection, solar cells, radiation detection, and imaging. However, numerous scientific issues are hampering the advancement of optoelectronic functional materials, which has become the research focus to be solved in the field. These problems include the microstructural regulations and structure-property relationships of functional materials, mechanisms for optoelectronic conversion, surface-interface charge transfer, and energy transfer. The purpose of this special issue is to collate and present some of the recent and important achievements in optoelectronic functional materials research, further promoting the development of this critical field.

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