Self-Powered High-Performance WS₂ Photodetector via a Monolithic p-i-n Homojunction.

ABSTRACT: Lateral homojunction photodetectors (PDs) offer high responsivity and fast response, yet challenges in tailoring carrier concentrations in two-dimensional transition-metal dichalcogenides (TMDs) have limited their implementation. Here, we demonstrate a high-performance self-powered monolithic lateral p-i-n homojunction PD using multilayer WS₂. To our knowledge, this study is the first report of achieving tunable, multilevel compensation doping via WO_X formation using only time-controlled and region-selective ultraviolet (UV)/ozone oxidation. The oxidation process transforms WS₂ through distinct phases: initial WO_X (2 < X < 3) formation with thickness growth (0-90 min), increased WO₃ ratio without thickness change (90-120 min), and self

SUBMITTER: Park J 

PROVIDER: S-EPMC12447547 | biostudies-literature | 2025 Sep

REPOSITORIES: biostudies-literature