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Broadband infrared photodetection using a narrow bandgap conjugated polymer

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 optoelectro ....

Stanford Research Systems , Santa Barbara Infrared Inc , Materials Chemistry Program , University Of Southern Mississippi , National Science Foundation , Us Department Of Energy , Office Of Science , National Accelerator Laboratory , Office Of Scientific Research , Supplementary Materials , Spectra Physics Solstice , Creative Commons Attribution Noncommercial , Southern Mississippi , Air Force Office , Scientific Research , Organic Materials Chemistry Program , Stanford Synchrotron Radiation Lightsource , Accelerator Laboratory , Basic Energy Sciences , ஸ்டான்போர்ட் ஆராய்ச்சி அமைப்புகள் , சாந்தா பார்பரா அகச்சிவப்பு இன்க் , பல்கலைக்கழகம் ஆஃப் தெற்கு மிசிசிப்பி , தேசிய அறிவியல் அடித்தளம் , எங்களுக்கு துறை ஆஃப் ஆற்றல் , அலுவலகம் ஆஃப் அறிவியல் , தேசிய முடுக்குப்பொறி ஆய்வகம் ,