Colloidal HgTe Material for Low-Cost Detection into the MWIR

We report on HgTe colloidal-based quantum-dot mid-infrared (IR) photodetectors. We demonstrate tuning the cutoff wavelength of this detector from the near IR up to 7 μ m. Responsivity values of films of HgTe nanoparticles a few hundred nanometers thick are in the 100 mA W −1 range even at room temp...

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Veröffentlicht in:	Journal of electronic materials 2012-10, Vol.41 (10), p.2725-2729
Hauptverfasser:	Lhuillier, Emmanuel, Keuleyan, Sean, Liu, Heng, Guyot-Sionnest, Philippe
Format:	Artikel
Sprache:	eng
Schlagworte:	Applied sciences Characterization and Evaluation of Materials Chemical Sciences Chemistry and Materials Science Colloids Condensed Matter Cross-disciplinary physics: materials science rheology Electronic materials Electronics Electronics and Microelectronics Exact sciences and technology Infrared radiation Instrumentation Material chemistry Materials Materials Science Molecular electronics, nanoelectronics Nanoparticles Nanoscale materials and structures: fabrication and characterization Optical and Electronic Materials Optoelectronic devices Physics Quantum dots Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices Semiconductors Solid State Physics Thin films Tuning Wavelengths
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Beschreibung
Zusammenfassung:	We report on HgTe colloidal-based quantum-dot mid-infrared (IR) photodetectors. We demonstrate tuning the cutoff wavelength of this detector from the near IR up to 7 μ m. Responsivity values of films of HgTe nanoparticles a few hundred nanometers thick are in the 100 mA W −1 range even at room temperature. The detectivity of this film is limited by large 1/ f noise. Time responses as short as 200 ns are achieved.
ISSN:	0361-5235 1543-186X
DOI:	10.1007/s11664-012-2006-9