| Title | CH3NH3PbI3-xBrx perovskite solar cells via spray assisted two-step deposition: Impact of bromide on stability and cell performance |
| Authors | Chai, Gaoda Luo, Shiqiang Zhou, Hang Daoud, Walid A. |
| Affiliation | Peking Univ, ShenZhen Grad Sch, Sch Elect & Comp Engn, Shenzhen 518055, Peoples R China. City Univ Hong Kong, Sch Energy & Environm, Tat Chee Ave, Kowloon Tong, Hong Kong, Peoples R China. Peking Univ, ShenZhen Grad Sch, Sch Elect & Comp Engn, Shenzhen 518055, Peoples R China. Daoud, WA (reprint author), City Univ Hong Kong, Sch Energy & Environm, Tat Chee Ave, Kowloon Tong, Hong Kong, Peoples R China. |
| Keywords | Perovskite solar cells CH3NH3PbI3-xBrx Spray deposition Two-step deposition Ion diffusion SEQUENTIAL DEPOSITION HALIDE PEROVSKITES THIN-FILM EFFICIENT IODIDE RECOMBINATION MORPHOLOGY FABRICATION HYSTERESIS INTERFACE |
| Issue Date | 2017 |
| Publisher | MATERIALS & DESIGN |
| Citation | MATERIALS & DESIGN.2017,125,222-229. |
| Abstract | Fully converting the lead salt to perovskite is crucial for the performance of perovskite solar cells via the two-step deposition method. In this study, full conversion of PbI2 to perovskite is achieved via a spray assisted two-step deposition method with excess CH3NH3I sprayed onto the PbI2 layer. The influence of adding CH3NH3Br in the PbI2 solution in the first step on the resulting solar cells is investigated. The perovskite solar cells show significant increase in power conversion efficiency after one-night storage where a process of Br ion diffusion from Br-rich to I-rich regions is proposed. The study provides an alternative approach for incorporating Br and may help explaining the contradiction of reported conversion efficiency trends. |
| URI | http://hdl.handle.net/20.500.11897/472257 |
| ISSN | 0264-1275 |
| DOI | 10.1016/j.matdes.2017.04.010 |
| Indexed | SCI(E) |
| Appears in Collections: | 信息工程学院 |
