A thioacetamide interlayer anchoring TiO2 and (FAPbI3)1?x(MAPbBr3)x for high-performance perovskite solar cells |
| |
| Authors: | Jingjing Wang Yumin Chen Andi Zhao Minghuang Guo Jingwei Zhu Yafeng Li Mingdeng Wei |
| |
| Affiliation: | 1. Fujian Provincial Key Laboratory of Electrochemical Energy Storage Materials, Fuzhou University, Fuzhou, Fujian, China;2. Fujian Provincial Key Laboratory of Electrochemical Energy Storage Materials, Fuzhou University, Fuzhou, Fujian, China
Jiangsu Collaborative Innovation Center of Photovoltaic Science and Engineering, Changzhou University, Changzhou, Jiangsu, China |
| |
| Abstract: | In the perovskite solar cells (PSCs), traps of the perovskite film or interface are the research focus, which can severely hinder charge transfer and benefit charge recombination, thus weakening the photoelectric performance of the devices. Herein, a Thioacetamide (TAA) interfacial layer is used to passivate the traps of PSCs. Comparing to the control device (17.65%), the TAA-based solar cells can achieve an enhanced efficiency of 19.14%. It is found that the passivation caused by TAA occurs through the interactions of sulfur in TAA with undersaturated Pb in perovskite and Ti4+ in TiO2, resulting in a faster and more efficient charge transfer and a greatly reduced trap density from 3.36 × 1016 cm?3 to 1.93 × 1016 cm?3. It is shown that the modification method using TAA may be helpful for passivating traps and obtaining excellent photoelectric properties of PSCs. |
| |
| Keywords: | cells trap density passivation perovskite solar thioacetamide |
|
|
