Potential‐Driven Porous Red Phosphorus‐Powered Fully Integrated Arrays for High‐Throughput Photoelectrochemical Aptasensing

Abstract Red phosphorus (RP), as a talented semiconductor, is widely employed in the field of photocatalysis owing to its superior stability and optical properties. However, RP's inherent poor conductivity and rapid carriers’ recombination significantly impede its efficient photoelectrochemical (PEC) applications. Herein, non‐homogeneous porous RP particles (NPRPs) are prepared via a ball milling‐assisted hydrothermal strategy, which provides more chemical reaction sites and fast carriers transportation rates for sensitive PEC sensing. Experiments and computational findings reveal that NPRPs incorporating oxygen doping possess staggered energy band structures along with potential driving forces, which synergistically promote the separation and migration of carriers. Furthermore, carbon nanotubes are introduced to bridge the NPRPs for constructing a conductive network, and a uniform and fully‐integrated photoelectrode array is custom‐made in batches through zonal template‐filtration. As an illustration, aptamer‐mediated PEC sensors for trace amoxicillin (AMO, an artificial antibiotic) in various samples exhibit ultra‐high sensitivity (0.43 n m ) and robust selectivity. Such a PEC aptasensing prototype based on NPRPs arrays, with tunable detection throughput, holds great potential for rapid and on‐site screening of massive specimens. More meaningfully, this study offers an innovative paradigm for elemental semiconductors to efficiently transport carriers in the photoelectrocatalytic applications.