Description General description 4-Bromo-4′-fluorobiphenyl is a 4,4′-disubstituted biphenyl derivative that can be prepared by reacting 4-fluorobenzeneboronic acid with 4-bromo-iodobenzene. Its crystals belong to the monoclinic crystal system and P21/c space group. Application 4-Bromo-4′-fluorobiphenyl may be used in the preparation of 5,5′-bis(4′-fluoro-biphenyl-4-yl)-2,2′:5′,2′-terthiophene (p-F2BP3T), a fluorinated inducing layer for weak epitaxy growth (WEG). Packaging 500 mg in glass bottle