Femtosecond nonlinear optical response and minority carrier lifetime of F4TCNQ-doped bismuthene for optoelectronic and ultrafast photonic applications

Recent advances in ecofriendly 2D monoelemental bismuthene as an emerging material for energy, catalysis and biomedical applications

“…In this case, Liu et al 100 prepared bismuthene on GaAs, which possessed a large Bi-As binding energy, and as expect bismuthene, induced an electronic band in the band gap of GaAs, opening a gap that has a nontrivial topological nature. Abdelfatah et al 101 doped the p-type dopant tetrafluoro-tetracyanoquinodimethane (F4TCNQ) in bismuthene to achieve surface charge transfer. The doped bismuthene showed a carrier lifetime of 6.5 ms after doping, suggesting enhanced p-type conductivity, which is ascribed to the unusual charge transfer interaction between bismuthene and the F4TCNQ molecules.…”

Charge-transfer state and state mixing in tetracyanoquinodimethane probed using electroabsorption spectroscopy

“…[1][2][3] In the fields of materials chemistry and organic electronics, TCNQ analogues act as versatile electron-acceptor molecules for doping holes into materials. [4][5][6][7][8] Additionally, investigating the excited states of these molecules is important for the development of photoresponsive functional materials based on the TCNQ analogues. 9,10 TCNQ is the simplest molecule in the family of TCNQ analogues and can be regarded as an important model system for them.…”