Large-Area Hg1-xCdxTe PV detectors for remote-sensing

• Book ID: 104440437
• Publisher: Elsevier Science
• Year: 2003
• Tongue: English
• Weight: 58 KB
• Volume: 2003
• Category: Article
• ISSN: 1473-8325
• DOI: 10.1016/s1473-8325(03)00239-6

✦ Synopsis

State-of-the-art large-area photovoltaic (PV) detectors fabricated in HgCdTe grown by molecular beam epitaxy (MBE) have been demonstrated for the Crosstrack Infrared Sounder (CrIS) instrument. Large-area devices (1 mm in diameter) yielded excellent electrical and optical performance operating at 81 K for λc ~ 15µm, at 98 K for λ c ~ 9µm, and λc ~ 5µm spectral cutoffs. Fabricated detectors have neartheoretical electrical performance, and Anti Reflection coated quantum efficiency (QE) is greater than 0.70. Measured average R o A at 98 K is 2.0 x 10 7 Ωcm 2 , and near-theoretical QEs greater than 0.90 were obtained on detectors with λc ~ 5-µm spectral cutoffs. These state-ofthe-art large-area PV detector results reflect high-quality HgCdTe grown by MBE on CdZnTe substrates in all three spectral bands of interest.