Document Type
Article
Publication Date
6-1-2021
School
Polymer Science and Engineering
Abstract
Photodetection spanning the short-, mid-, and long-wave infrared (SWIR-LWIR) underpins modern science and technology. Devices using state-of-the-art narrow bandgap semiconductors require complex manufacturing, high costs, and cooling requirements that remain prohibitive for many applications. We report high-performance infrared photodetection from a donor-acceptor conjugated polymer with broadband SWIR-LWIR operation. Electronic correlations within the π-conjugated backbone promote a high-spin ground state, narrow bandgap, long-wavelength absorption, and intrinsic electrical conductivity. These previously unobserved attributes enabled the fabrication of a thin-film photoconductive detector from solution, which demonstrates specific detectivities greater than 2.10 × 109 Jones. These room temperature detectivities closely approach those of cooled epitaxial devices. This work provides a fundamentally new platform for broadly applicable, low-cost, ambient temperature infrared optoelectronics.
Publication Title
Science Advances
Volume
7
Issue
24
Recommended Citation
Vella, J.,
Huang, L.,
Eedugurala, N.,
Mayer, K.,
Ng, T.,
Azoulay, J.
(2021). Broadband Infrared Photodetection Using a Narrow Bandgap Conjugated Polymer. Science Advances, 7(24).
Available at: https://aquila.usm.edu/fac_pubs/18834
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