| 초록 |
As research continues, the efficiencies of perovskite hybrid solar cells are increasing steadily similar to the efficiency of crystalline Si solar cells. However, the hysteresis of current density–voltage (J–V) curve with respect to the forward and reverse scan direction and scan rate appear often at the perovskite hybrid solar cells. The cause of the J–V hysteresis of perovskite hybrid solar cells has not yet been clearly elucidated. We get three point of view on the origin of J–V hysteresis of perovskite solar cells. The possible origins of J–V hysteresis are considered the dielectric polarization by the ferroelectric properties of perovskite (i), the ionic motion/migration of perovskite materials (ii), and charge trapping and detrapping at trap sites by the unbalanced electron and hole flux (iii). We then discuss how to reduce the J–V hysteresis with respect to the scan direction and scan rate with each above three point |
