Simultaneous Optical Tuning of Hole and Electron Transport in Ambipolar WSe₂ Interfaced with a Bicomponent Photochromic Layer: From High‐Mobility Transistors to Flexible Multilevel Memories

Abstract

The interfacing of 2D materials (2DMs) with photochromic molecules provides an efficient solution to reversibly modulate their outstanding electronic properties and offers a versatile platform for the development of multifunctional field‐effect transistors (FETs). Herein, optically switchable multilevel high‐mobility FETs based on few‐layer ambipolar WSe2 are realized by applying on its surface a suitably designed bicomponent diarylethene (DAE) blend, in which both hole and electron transport can be simultaneously modulated for over 20 cycles. The high output current modulation efficiency (97% for holes and 52% for electrons) ensures 128 distinct current levels, corresponding to a data storage capacity of 7 bit. The device is also implemented on a flexible and transparent poly(ethylene terephthalate) substrate, rendering 2DM/DAE hybrid structures promising candidates for flexible multilevel nonvolatile memories.

Tailoring Superconductivity in Large-Area Single-Layer NbSe2 via Self-Assembled Molecular Adlayers

“…[10][11][12] Molecular functionalization is one of the most promising methods to engineer TMDs, [13][14][15][16][17][18] since an accurate choice of convenient functional groups makes it possible to provide programmable doping levels and unique responsivity to light and magnetic fields. 12,[19][20][21][22][23][24][25][26] While most studies on molecular functionalization of TMDs demonstrate the engineering of the optoelectronic properties of micron-sized mechanically exfoliated flakes, 12,13,[22][23][24][25][26][14][15][16][17][18][19][20][21] only few works focus on technologically relevant large-area TMDs, 27,28 leaving an open question about the up-scalability of chemical approaches. Moreover, the effect of organic adsorbates on other intrinsic properties of TMDs, like superconductivity, has been notably less explored.…”

Organic field-effect transistors based on organic and polymeric semiconductors and photochromic molecules

“…二芳基乙烯(DAE)衍生物因其具有较高的光敏 感度，光稳定性以及热稳定性，适合作为应用对象 的 光 致 变 色 分 子 [59][60] 。 DAE 分 子 可 在 紫 外 / 可 见 (UV/Vis)光照条件下，在开环(open-ring)状态和关环 (closed-ring)状态间进行构型转换，并发生明显的前 线轨道能级的变化 [61] 。利用 DAE 分子的该性质，将 其与能级合适的有机(高分子)半导体结合，可实 现光照下场效应性能的可逆调控，成功构筑光调控 有机场效应晶体管 [62][63][64][65][66][67][68][69][70][71][72] 行物理掺杂研究(见图 4) [68]…”

A Marr's Three‐Level Analytical Framework for Neuromorphic Electronic Systems

“…In the last two sections, we have already seen examples of how advanced technologies enable electronic mimics of individual parts of the neural system with demonstrated simple computational functionalities. We do not intend to survey the neuromorphic hardware implementation again as this has been done in numerous reviews, just to name a few, at materials level, [ 48,661–722 ] at device level, [ 10,244,263,723–790 ] at more circuit level, or above. [ …”