“…[10] In contrast to conventional electrochemical techniques, due to the separation of excitation signal and output signal, PEC assay possesses low background signal, which reduces the background interference. [11] PEC analytical methods have gained widespread application in detecting various targets, such as bacteria, proteins, nucleic acids, small molecules, and metal ions. [12] Importantly, the efficacy of PEC methods critically hinges upon the semiconductor materials for the photoelectrode, and an array of photoactive semiconductor materials has been developed for PEC sensors, including metal oxide (TiO 2 , ZnO), [13] metal sulfides compound (Bi 2 S 3 , Ag 2 S) [14] and nanocomposite materials (AuNRs@TiO 2 , Bi 2 S 3 /TiO 2 ).…”