I-V characteristic measuring apparatus and I-V characteristic measuring method for solar cell, and recording medium recorded with program for I-V characteristic measuring apparatus

摘要

To provide an I-V characteristic measuring apparatus that can, even though a solar simulator of a flash light type is used, accurately measure a true I-V characteristic of a solar cell that exhibits a different I-V characteristic depending on a sweep direction when a sweep time of applied voltage is short, an internal division ratio calculation part that, at each voltage value, calculates an internal division ratio at which a current value of a dark state stationary I-V characteristic internally divides a gap between a current value of a dark state forward I-V characteristic and a current value of a dark state reverse I-V characteristic; and a light state stationary I-V characteristic estimation and calculation part that, on the basis of the internal division ratio, a light state forward I-V characteristic, and a light state reverse I-V characteristic, estimates and calculates a light state stationary I-V characteristic are provided.

主权项

1. An I-V characteristic measuring apparatus for a solar cell comprising:
a light state forward I-V characteristic storage part that stores a light state forward I-V characteristic that is an I-V characteristic of the solar cell measured in a light state where the solar cell is irradiated with pseudo-sunlight and in a forward sweep mode in which applied voltage to the solar cell is swept from a short-circuit current side to an open-circuit voltage side within a predetermined time; a light state reverse I-V characteristic storage part that stores a light state reverse I-V characteristic that is an I-V characteristic of the solar cell measured in the light state and in a reverse sweep mode in which the applied voltage to the solar cell is swept from the open-circuit voltage side to the short-circuit current side within the predetermined time; a dark state forward I-V characteristic storage part that stores a dark state forward I-V characteristic that is an I-V characteristic of the solar cell measured in a dark state where the solar cell is not irradiated with the pseudo-sunlight and in the forward sweep mode; a dark state reverse I-V characteristic storage part that stores a dark state reverse I-V characteristic that is an I-V characteristic of the solar cell measured in the dark state and in the reverse sweep mode; a dark state stationary I-V characteristic storage part that stores a dark state stationary I-V characteristic that is an I-V characteristic of the solar cell measured in the dark state and in a stationary sweep mode in which the applied voltage to the solar cell is swept between the short-circuit current side and the open-circuit voltage side over a time longer than the predetermined time; an internal division ratio calculation part that, at each voltage value, calculates an internal division ratio at which a current value of the dark state stationary I-V characteristic internally divides a gap between a current value of the dark state forward I-V characteristic and a current value of the dark state reverse I-V characteristic; and a light state stationary I-V characteristic estimation and calculation part that, on a basis of the internal division ratio, the light state forward I-V characteristic, and the light state reverse I-V characteristic, estimates and calculates a light state stationary I-V characteristic that is an I-V characteristic measured in the light state and in the stationary sweep mode.