Direct covalent modification of black phosphorus quantum dots with conjugated polymers for information storage

Abstract

By using a one-step synthetic strategy, the first conjugated polymer covalently functionalized BPQDs have been synthesized. This material exhibits an excellent nonvolatile rewritable memory effect, with a large ON/OFF current ratio (>107) and a low switch-on voltage (−0.89 V).

Covalent functionalization of two-dimensional black phosphorus nanosheets with porphyrins and their photophysical characterization

“…The similar peaks were observed in the BPNSs-TPP along with clear vibrational signals corresponding to the fingerprint region of porphyrin molecules and a weak absorption at 870 cm -1 due to the P-C stretching vibration. 42,54 The presence of additional Please do not adjust margins Please do not adjust margins peaks in the BPNSs-TPP compared to the bare BPNSs and the P-C stretching further confirm the successful covalent modification of BPNSs with TPP. Morphology of exfoliated and functionalized BPNSs were studied using transmission electron microscopy (TEM) and high resolution TEM (HR-TEM).…”

Chemical functionalization of 2D black phosphorus

“…To date, several protective strategies have been reported to enhance the stability of few‐layer BP, including physical coating with a protective layer, such as Al 2 O 3 , h ‐BN, MoS 2 , and a polymer, 58‐88 heteroatom doping, 89‐91 and chemical functionalization 92‐126 . The encapsulation of the coating layer can inhibit the interaction of oxygen with the phosphorus atoms on the BP surface and edge, thus impeding the degradation 82 .…”

Optoelectrical Switching of Nonfullerene Acceptor Y6 and BPQD‐Based Bulk Heterojunction Memory Device through Photoelectric Effect

“…Similar to graphene, 2D black phosphorus (BP) nanosheets also show a range of unique characteristics such as a marked puckering of the sp 3 structure, larger charge‐carrier mobility, a thickness‐dependent direct bandgap, and strong intrinsic in‐plane anisotropy, which have attracted the most attention all over the world. [ 16–25 ] In contrast to 2D BP nanosheets, 0D BP quantum dots (BPQDs) exhibit more excellent properties, e.g., size and composition‐dependent light absorption, high photoluminescence quantum yield, and long exciton lifetime due to the quantum size effect. Zhang et al.…”