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| Content Provider | Royal Society of Chemistry (RSC) |
|---|---|
| Author | Zhu, Weidong Bao, Chunxiong Tu, Wenguang Lv, Bihu Li, Faming Yang, Jie Zhou, Yong Zhou, Xiaoxin Wang, Yangrunqian Zou, Zhigang Wang, Xiaoyong Yu, Tao |
| Copyright Year | 2016 |
| Abstract | As the light absorption layer, a CH3NH3PbI3 perovskite film with a fully and homogeneously covered flat surface is crucially important for perovskite photovoltaic devices. Herein, the sequential method is improved by introducing a spray-assisted solution process (SSP) instead of the commonly used dipping process in CH3NH3PbI3 perovskite film deposition. The morphology analysis for PbI2 films found that the airflow of the spray pre-wetting process provides a driving force for accelerating the dissolution and deep infiltration, which is helpful to form a mesoporous PbI2 scaffold. So the 2-propanol (IPA) pre-wetting has advantages to complete the reaction of PbI2 and CH3NH3I through the diffusion channel in the grain boundary and on the surface of the PbI2 film. Furthermore, the grain size and surface coverage of the film can be controlled effectively by a facile IPA pre-wetting process in the SSP. Meanwhile, the influence of the annealing process on the crystallization, chemical composition, microstructures and carrier transport properties of the perovskite films were investigated. Our results showed that an optimum annealing temperature and time can reduce crystal defects in the film and weaken the hysteresis phenomenon of the perovskite solar cell. Efficient mesoporous structured perovskite solar cells were fabricated with an optimal PCE of 14.2%, because of the improved perovskite film preparation method. |
| Starting Page | 11372 |
| Ending Page | 11380 |
| Page Count | 9 |
| File Format | HTM / HTML PDF |
| ISSN | 20507488 |
| Volume Number | 4 |
| Issue Number | 29 |
| Journal | Journal of Materials Chemistry A |
| DOI | 10.1039/c6ta04600b |
| Language | English |
| Publisher | Royal Society of Chemistry |
| Access Restriction | Open |
| Subject Keyword | SSP Perovskite Solar cell Lead(II) iodide Mesoporous material Isopropyl alcohol Diffusion Nucleic acid thermodynamics Hysteresis Perovskite solar cell |
| Content Type | Text |
| Resource Type | Article |
| Subject | Chemistry Renewable Energy, Sustainability and the Environment Materials Science |
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