Bandgap Engineering of Hydroxyl-Functionalized Borophene for Superior Photo-Electrochemical Performance.

In this study, hydroxyl-functionalized borophene (borophene-OH) with tunable bandgap was fabricated by liquid-phase exfoliation using 2-butanol solvent. Surface energy matching between boron and 2-butanol produced smooth borophene, and the exposed unsaturated B sites generated by B-B bond breaking during exfoliation coordinated with OH groups to form semiconducting borophene-OH, enabling a tunable bandgap of 0.65-2.10 eV by varying its thickness. Photoelectrochemical (PEC) measurements demonstrated that the use of borophene-OH to fabricate working electrodes for PEC-type photodetectors significantly enhanced the photocurrent density (5.0 μA/cm2) and photoresponsivity (58.5 μA/W) compared with other 2D monoelemental materials. Thus, borophene-OH is a promising semiconductor with great optoelectronic potential. PMID: 32940389 [PubMed - as supplied by publisher]
Source: Angewandte Chemie - Category: Chemistry Authors: Tags: Angew Chem Int Ed Engl Source Type: research