Lead sulphide cell

The cell used a lithium anode and a lead iodide-lead sulphide cathode ... 

The reflected rays are directed towards two lead sulphide photoelectric cells. 

Snaith HJ, Stavrinadis A, Docampo P, Watt AAR (2011) Lead-sulphide quantum-dot sensitization of tin oxide based hybrid solar cells. 8olar Energy 85 1283-1290... 

Near infrared detectors These are usually photoconductive cells which detect infrared radiation in the range 0.8 3.0 p. The sensing element is a semiconductor (germanium, lead sulphide, or lead tellurlde). Upon illumination with radiation of appropriate wavelength, the electrons of the semiconductor are raised to conduction bands. Tills causes a drop in electrical resistance. Consequently, if a small voltage is applied, a large Increase in current can be noted. The resistance of the system is such that the current may be amplified and finally indicated on a meter is recorded. 

Lead sulphide, or lead telluride photo-conductive cells. 

Detection of infra-red radiation is by means of its heating effect, and the thermo-couple, the bolometer and the Golay pneumatic cell are each used by different manufacturers. Photoconductive cells of the lead sulphide type, although having a speed of response superior to the heat-sensitive detectors, are not as yet sufficiently sensitive beyond about 7//. 

There has been a reduction in free energy of the chemical system which is manifested as electrical energy. Under the assumption that the chemical reaction occurs reversibly, that is no energy is lost but only exchanged between chemical and electrical forms, the cell e.m.f. can be calculated. The change in free energy (AG) for reaction (4.36) at 350 °C is approximately —400 kJ. For each mole of the sulphide formed two moles of Na+ ions are transported across the cell. The calculation (Eq. (4.33)) leads to a cell e.m.f. of 2.08 Y. 

A loss of selenium from the surface was observed upon exposure to potentials greater than 0.85 V, and this can have a detrimental effect on the implementation of RuSe/C as a cathode material in fuel cell applications which should, therefore, be further investigated. While steady-state operation could be confined to low cathode potentials, exposure to higher potentials in transients, e.g. during start-up conditions, could lead to selenium loss with a concomitant drop in fuel cell performance. The commercially available rhodium sulphide underperformed and exhibited higher susceptibility to methanol compared to RuSe/C, but was found to be more stable under similar testing conditions. 

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