Branched HgTe Nanorods for Stable Room Temperature Extended Short-Wave Infrared Photodetectors
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.
Authors
- Brian A. Korgel (ORCID: https://orcid.org/0000-0001-6242-7526)
- Jungchul Noh (ORCID: https://orcid.org/0000-0002-3710-9988)
- Shea Sanvordenker (ORCID: https://orcid.org/0009-0009-7343-3644)
- Richard E. Pimpinella
- J. Howell
Institutions
- Sivananthan Laboratories (United States) (US)
- The University of Texas at Austin (US)
- Hongik University (KR)
Publication Details
- Journal
- ACS Nano
- Published
- 2025-06-17
- DOI
- https://doi.org/10.1021/acsnano.5c03657
- Primary Topic
- Advanced Semiconductor Detectors and Materials
- Type
- article
- Field-Weighted Citation Impact
- 0.00
Funders
- Welch Foundation
- Division of Industrial Innovation and Partnerships