Confined Assembly Organic ITIC One‐Dimensional (1D) Arrays Toward Multispectral Functional Optoelectronics

Abstract Multispectral photodetectors are promising devices capable of detecting photons in a broad range of multiple wavelengths, which have gained considerable potential in biomedical imaging, surveillance, and other emerging artificial intelligence applications. Different light signals acquired with these photodetectors are useful in effective object recognition and navigations due to the extraction of redundant light information. However, these capabilities are obstructed by the circuitry complexity and unwanted electrical cross‐talk arising from the combination of multiple absorbers and structures. Herein, a confined assembly method by the synergy of solvent engineering for controlling organic ITIC 1D arrays in different crystallinity is proposed. Organic array‐based photodetectors present a multispectral optoelectronic performance with the maximum responsivities of 26.0, 17.6, 174.9, and 60.0 mA W −1 , corresponding to different wavelength lights. Based on the large‐area fabrication of ITIC array‐based photodetectors, multispectral image sensors with high accuracy are obtained for capturing the different light signals of capital letters “T,” “I,” “P,” and “C.” Furthermore, the integration of the devices into functional optoelectronic circuits have been demonstrated as signal intermediary for optical and electrical data disposal, which open up new opportunities for the integration of organic semiconductors toward the multispectral functional optoelectronic modules.