Abstract
Films of Cd-rich cadmium mercury telluride (CdxHg1-xTe, CMT) 0.1 to 2 µm thick were formed on conducting glass (Sn02) and cadmium substrates by electrochemical (potentiostatic) deposition from an aqueous bath. 1 - x ranged from 0 to 0.25. The photoresponse of CMT electrodes of n- and p-type was investigated in electrolytes containing different redox couples. In 1M polysulfide solution, the onset of photocurrents was found at −1.1V vs. SCE, independent of the optical bandgap. In the plateau range of the photocurrent potential curves, quantum yields of charge collection up to 0.45 were measured for Cd0.9Hg0.1Te. The long-wavelength onset of photoresponse varied with the bandgap (1.47–1.08 eV) for 1 - x between 0.01 and 0.2. The drawback of the small minority-carrier diffusion length of CMT grown by electrocrystallization can be circumvented with stacked, semitransparent thin-film electrodes. Experiments show that with such a configuration of thin CMT films grown on transparent substrates, the total photocurrent output can be increased considerably.
Original language | English (US) |
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Pages (from-to) | 3434-3437 |
Number of pages | 4 |
Journal | Journal of the Electrochemical Society |
Volume | 137 |
Issue number | 11 |
DOIs | |
State | Published - Nov 1990 |
Externally published | Yes |
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Renewable Energy, Sustainability and the Environment
- Surfaces, Coatings and Films
- Electrochemistry
- Materials Chemistry