Although the record efficiencies of perovskite hybrid solar cells are gradually reaching the efficiency of crystalline Si solar cells, perovskite hybrid solar cells often exhibit significant current density-voltage (J-V) hysteresis with respect to the forward and reverse scan direction and scan rate. The origin of the J-V hysteresis of perovskite hybrid solar cells has not, to date, been clearly elucidated. 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) are considered the possible origins of J-V hysteresis. Here, we reviewed the origin of the J-V hysteresis of perovskite solar cells from the above three points of view and we then suggest how one may reduce the J-V hysteresis with respect to the scan direction and scan rate.
Research Interests
Thin Film Solar Cells; 박막태양전지; Compound Semiconductor Materials & Processes; 화합물 반도체 재료 및 공정; Optoelectronic Devices based on Micro-Optical Structures; 미세 광학 구조 기반 광전자소자; Organic/Inorganic/Metallic Hybrid Thin Films & Applications; 유무기금속 하이브리드 박막