| 초록 |
Increasing open-circuit voltage (Voc) and current density (JSC) of perovskite solar cells (PSCs), a lot of efforts established by introducing p-type or n-type dopants with high electronegativity than Ti into the TiO2 electron transport/selective layers. Herein, it is demonstrated that the use of an acid doping into TiO2 with 4-chlorobenzoic acid (BA-TiO2) as dopant. The synthesized material has been confirmed with XRD, SEM, FT-IR, and space-charge-limited current (SCLC) properties. By utilizing as electron transporting material (ETL), we fabricated PSCs with device configuration of FTO/TiO2(or)BA-TiO2/Perovskite/HTM/Au. It shows the better performance in Voc, JSC and power conversion efficiency in mesoscopic PSCs. As a result, for mesoscopic PSCs, the doping of benzoic acid increases the efficiency from 18.23% to 20.22% with reduced hysteresis and good stability. |
