Controlling Isomerization of Photoswitches to Modulate 2D Logic-in-Memory Devices by Organic-Inorganic Interfacial Strategy

Yongli Duan; Miaomiao Song; Fanxi Sun; Yi Xu; Fanfan Shi; Hong Wang; Yonghao Zheng; Chao He; Xilin Liu; Chen Wei; Xu Deng; Longquan Chen; Fucai Liu; Dongsheng Wang

doi:10.1002/advs.202207443

Controlling Isomerization of Photoswitches to Modulate 2D Logic-in-Memory Devices by Organic-Inorganic Interfacial Strategy

Adv Sci (Weinh). 2023 May;10(13):e2207443. doi: 10.1002/advs.202207443. Epub 2023 Mar 11.

Authors

Yongli Duan¹, Miaomiao Song¹, Fanxi Sun¹, Yi Xu², Fanfan Shi³, Hong Wang³, Yonghao Zheng^{1

4}, Chao He⁵, Xilin Liu⁴, Chen Wei¹, Xu Deng⁶, Longquan Chen², Fucai Liu¹, Dongsheng Wang¹

Affiliations

¹ School of Optoelectronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu, 610054, P. R. China.
² School of Physics, University of Electronic Science and Technology of China, Chengdu, 610054, P. R. China.
³ Department of Physics, University of Science and Technology of China, Hefei, 230026, P. R. China.
⁴ Department of Orthopedic, Sichuan Provincial People's Hospital and Sichuan Academy of Medical Science and Affiliated Hospital of University of Electronic Science and Technology of China, Chengdu, 610072, P. R. China.
⁵ College of Polymer Science and Engineering, Sichuan University, Chengdu, 610065, P. R. China.
⁶ Institute of Fundamental and Frontier Science, University of Electronic Science and Technology of China, Chengdu, 610054, P. R. China.

Abstract

Logic-in-memory devices are a promising and powerful approach to realize data processing and storage driven by electrical bias. Here, an innovative strategy is reported to achieve the multistage photomodulation of 2D logic-in-memory devices, which is realized by controlling the photoisomerization of donor-acceptor Stenhouse adducts (DASAs) on the surface of graphene. Alkyl chains with various carbon spacer lengths (n = 1, 5, 11, and 17) are introduced onto DASAs to optimize the organic-inorganic interfaces: 1) Prolonging the carbon spacers weakens the intermolecular aggregation and promotes isomerization in the solid state. 2) Too long alkyl chains induce crystallization on the surface and hinder the photoisomerization. Density functional theory calculation indicates that the photoisomerization of DASAs on the graphene surface is thermodynamically promoted by increasing the carbon spacer lengths. The 2D logic-in-memory devices are fabricated by assembling DASAs onto the surface. Green light irradiation increases the drain-source current (I_ds ) of the devices, while heat triggers a reversed transfer. The multistage photomodulation is achieved by well-controlling the irradiation time and intensity. The strategy based on the dynamic control of 2D electronics by light integrates molecular programmability into the next generation of nanoelectronics.

Keywords: 2D materials, donor-acceptor Stenhouse adducts; logic-in-memory devices; photoisomerization; photoswitches.

Abstract

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