Inspired by the photosynthesis process of natural plants, multifunctional transistors based on natural biomaterial chlorophyll and organic semiconductors (OSCs) are reported. Functions as photodetectors (PDs) and light‐stimulated synaptic transistors (LSSTs) can be switched by gate voltage. As PDs, the devices exhibit ultrahigh photoresponsivity up to 2 × 106 A W−1, detectivity of 6 × 1015 Jones, and Iphoto/Idark ratio of 2.7 × 106, which make them among the best reported organic PDs. As LSSTs, important synaptic functions similar to biological synapses are demonstrated, together with a dynamic learning and forgetting process and image‐processing function. Significantly, benefiting from the ultrahigh photosensitivity of chlorophyll, the lowest operating voltage and energy consumption of the LSSTs can be 10−5 V and 0.25 fJ, respectively. The devices also exhibit high flexibility and long‐term air stability. This work provides a new guide for developing organic electronics based on natural biomaterials.

PurposeProfessor independent directors have been the subject of academic debate as to whether they can improve corporate innovation performance. Accordingly, this paper aims to investigate the relationship between professor independent directors, the marketization process and corporate innovation performance in China.Design/methodology/approachUsing a sample of Chinese A-share listed companies from 2014 to 2017, this study examines how professor independent directors and the (low and high) marketization process affect corporate innovation performance.FindingsThe empirical analysis of this yields the following main results. First, enterprises with a higher proportion of professor independent directors outperform those with a low proportion of professor independent directors in terms of corporate innovation. Second, the study of introducing the marketization process finds that there is no “market failure”. Third, while professor independent directors have a significant association with innovation performance in the high-marketization group, this association is negligible in the low-marketization group, indicating that there is no “substitution effect”.Originality/valueThis research provides empirical evidence to support the hiring of professors with relevant backgrounds as independent directors who can contribute meaningfully to corporate governance and innovation while also fostering industrial transformation. This study also identifies that the role of professor independent directors in facilitating corporate innovation is more effective in regions with a high degree of marketization than in regions with a low degree of marketization, implying that increasing marketization benefits the role of professor independent directors in facilitating corporate innovation.

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