Passivation of Sodium Benzenesulfonate at the Buried Interface of a High-Performance Wide-Bandgap Perovskite Solar Cell
oleh: Sijia La, Yaqi Mo, Xing Li, Xuzheng Feng, Xianggang Chen, Zhuoxin Li, Miao Yang, Dongxu Ren, Shuyi Liu, Xiaoxia Cui, Jieqiong Chen, Zhao Zhang, Zhengbo Yuan, Molang Cai
| Format: | Article |
|---|---|
| Diterbitkan: | MDPI AG 2024-03-01 |
Deskripsi
The phase segregation of wide-bandgap perovskite is detrimental to a device’s performance. We find that Sodium Benzenesulfonate (SBS) can improve the interface passivation of PTAA, thus addressing the poor wettability issue of poly[bis(4-phenyl)(2,4,6-trimethylphenyl)amine](PTAA). This improvement helps mitigate interface defects caused by poor contact between the perovskite and PTAA, reducing non-radiative recombination. Additionally, enhanced interface contact improves the crystallinity of the perovskite, leading to higher-quality perovskite films. By synergistically controlling the crystallization and trap passivation to reduce the phase segregation, SBS-modified perovskite solar cells (PSCs) achieved a power conversion efficiency (PCE) of 20.27%, with an open-circuit voltage (<i>V</i><sub>oc</sub>) of 1.18 V, short-circuit current density (<i>J</i><sub>sc</sub>) of 20.93 mA cm<sup>−2</sup>, and fill factor (FF) of 82.31%.