Scalable Fabrication of Black Phosphorous Films for Infrared Photodetector Arrays.

ABSTRACT: Bulk black phosphorous (bP) exhibits excellent infrared (IR) optoelectronic properties, but most reported bP IR photodetectors are fabricated from single exfoliated flakes with lateral sizes of < 100 µm. Here, scalable thin films of bP suitable for IR photodetector arrays are realized through a tailored solution-deposition method. The properties of the bP film and their protective capping layers are optimized to fabricate bP IR photoconductors exhibiting specific detectivities up to 4.0 × 10⁸ cm Hz^1/2 W^-1 with fast 30/60 µs rise/fall times under λ = 2.2 µm illumination. The scalability of the bP thin film fabrication is demonstrated by fabricating a linear array of 25 bP photodetectors and obtaining 25 × 25 pixel IR images at ≈203 ppi with good spatial fide

SUBMITTER: Corletto A 

PROVIDER: S-EPMC11575499 | biostudies-literature | 2024 Sep

REPOSITORIES: biostudies-literature