| 摘要 |
PURPOSE:To produce photovoltaic elements of uniform characteristics with good reproducibility in a mass production by coating paste which contains powders of Cd, Te and a melting agent on a CdS sintered film, filling it in a semihermetical port, and calcining it in N2 with the prescribed amount of a melting agent gas while forcibly exhausting the gas. CONSTITUTION:The prescribed amount of N2 is flowed inside, outside and at the center in a calcining furnace of curtains of inlet and outlet of the furnace so that the center becomes approx., 620 deg.C in the furnace. A CdS film is printed and calcined on a glass substrate, a mixture of powders of Cd, Te, CdCl2 and viscous binder is coated, dried at 100 deg.C, then filled in an alumina port 6 with a porous cover, placed on a belt 7, and fed into the furnace at the prescribed speed. The CdCl2 is evaporated to advance the crystal growth of the CdTe, thereby forming a sintered film. The CdCl2 vapor remains from the pores of the cover into the furnace to be mixed with the N2. Then, when it is sintered while forcibly exhausting in the amount of 20-40% to the flow rate of the N2, the density of the CdCl2 does not increase, the atmosphere in the furnace does not change, no defect occurs in the continuous calcination, and the elements having uniform characteristics can be obtained in good reproducibility. |
