Abstract
Photoelectrochemical cells with short term stability (at least) have been constructed from fracture surfaces of n-type polycrystalline boules of CuInSe2. The recently developed electrolyte of Menezes [Appl. Phys. Lett. 45, 148 (1984)] appeared to have a passivating effect on grain boundaries. Samples with hundreds of boundaries easily attained half the best (12%) single crystal efficiency without any optimization. Microprobe analyses of the treated surfaces showed strong depletion of Cu and incorporation of I but the latter distribution appeared to be nonuniform. Poor fill factors were found on randomly fractured surfaces larger than 1 cm2. Only n-type samples were successful.
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