Abstract
The growing demand for storage space has promoted in-depth research on magnetic performance regulation in an energy-saving way. Recently, we developed a solar control of magnetism, allowing the magnetic moment to be manipulated by sunlight instead of the magnetic field, current, or laser. Here, binary and ternary photoactive systems with different photon-to-electron conversions are proposed. The photovoltaic/magnetic heterostructures with a ternary system induce larger magnetic changes due to higher short current density (JSC) (20.92 mA·cm−2) compared with the binary system (11.94 mA·cm−2). During the sunlight illumination, ferromagnetic resonance (FMR) shift increases by 80% (from 169.52 to 305.48 Oe) attributed to enhanced photo-induced electrons doping, and the variation of saturation magnetization (MS) is also amplified by 14% (from 9.9% to 11.3%). Furthermore, photovoltaic performance analysis and the transient absorption (TA) spectra indicate that the current density plays a major role in visible light manipulating magnetism. These findings clarify the laws of sunlight control of magnetism and lay the foundation for the next generation solar-driven magneto-optical memory applications.
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Acknowledgements
This work was supported by the National Key R&D Program of China (Nos. 2019YFA0307900 and 2018YFB0407601), the National Natural Science Foundation of China (Nos. 91964109, 11534015, 51802248, 11804266, and 62001366), the National 111 Project of China (No. B14040), the Fundamental Research Funds for the Central Universities (No. xjh012019042), and the China Postdoctoral Science Foundation (Nos. 2018M643636). The authors acknowledge the support from the International Joint Laboratory for Micro/Nano Manufacturing and Measurement Technologies. Z. Y. Z. and M. L. were supported by the China Recruitment Program of Global Youth Experts.
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Improving solar control of magnetism in ternary organic photovoltaic system with enhanced photo-induced electrons doping
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Du, Y., Wang, S., Wang, L. et al. Improving solar control of magnetism in ternary organic photovoltaic system with enhanced photo-induced electrons doping. Nano Res. 15, 2626–2633 (2022). https://doi.org/10.1007/s12274-021-3841-x
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DOI: https://doi.org/10.1007/s12274-021-3841-x