Branched HgTe Nanorods for Stable Room Temperature Extended Short-Wave Infrared Photodetectors.
basic_science · Level V
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- Record sourced from PubMed, PMID 40524374.
- Also identified by DOI 10.1021/acsnano.5c03657.
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Abstract
Single-element detectors (SEDs) with a room temperature extended short-wave infrared (eSWIR) photoresponse were fabricated with branched nanorods of HgTe. Nanorods with high aspect (length/width) ratios were obtained by using stoichiometric excesses of Hg (i.e., [Hg]/[Te] molar ratios greater than one) and relatively low reaction temperatures, as low as room temperature. The size-tunable optical cutoff wavelengths of the detectors ranged from 2 to 3.5 μm, with specific detectivities as high as 2.4 × 10<sup>11</sup> Jones. The devices retained their responsivity for more than a year. Branched nanorods of HgTe are promising materials for IR photodetectors and imagers.