SIC OpenIR
Perovskite solar cells passivated by distorted two-dimensional structure
Fu Peng-Fei; Yu Dan-Ni; Peng Zi-Jian; Gong Jin-Kang; Ning Zhi-Jun
2019-08-05
Source PublicationACTA PHYSICA SINICA
ISSN1000-3290
Volume68Issue:15
SubtypeArticle
AbstractHybrid perovskites are a series of solution-processable materials for photovoltaic devices. To achieve better performance and stability, interface passivation is an effective method. So far, the most commonly used passivators are organic amines, which can tailor perovskite into a lower-dimensional structure (RuddlesdenPopper perovskite). Here, we select a biimizole (BIM) molecule as a new passivator for perovskite. The BIM based single layer perovskite has a more rigid structure. And multi-layered structure cannot be formed due to large lattice mismatching and structural rigidity. By inducing the excess MAI (methanaminium iodide) into the lattice, the layered structure is maintained, and half of the BIM molecules are replaced by MA (methylamine). The mixed layered structure is distorted, because of the difference in size between two kinds of cations. We then investigate passivation effect of BIM on perovskite solar cells. By carefully controlling the feed ratio in precursor solutions, we fabricate solar cells with different passivation structures. We find that the introduction of BIM can cause V-oc to increase generally, indicating that MAPbI(3) is well passivated. The peak at 7.5 degrees and 15 degrees in X-ray diffraction pattern are corresponding to a two-dimensional (2D) phase with a shorter layer distance. There are no peaks at lower degrees, so that no multi-layered structure is formed in the film either. We suppose that a dual-phase 2D-3D (where 3D represents three-dimensional) structure is formed in the perovskite film. To explain the passivation effect of the two 2D structures, we investigate their lattice matching towards MAPbI(3). The distorted 2D structure is well matched with (110) face of o-MAPbI(3), and the mismatching rate is lower 1% in the two directions. On the other hand, the BIM based 2D structure cannot well match with (-110) face of o-MAPbI(3), nor with (001) face of c-MAPbI(3). We also consider that the less rigidity of distorted structure contributes to better passivation. As a result, we achieve a BIM passivated perovskite solar cell with a power conversion efficiency up to 14%. This work paves a new way to the interface engineering of perovskite solar cells.
Keywordperovskite solar cell two-dimensional structure
DOI10.7498/aps.68.20190306
Language中文
WOS Research AreaPhysics
PublisherCHINESE PHYSICAL SOC
Citation statistics
Document Type期刊论文
Identifierhttp://ir.sic.ac.cn/handle/331005/26920
Collection中国科学院上海硅酸盐研究所
Recommended Citation
GB/T 7714
Fu Peng-Fei,Yu Dan-Ni,Peng Zi-Jian,et al. Perovskite solar cells passivated by distorted two-dimensional structure[J]. ACTA PHYSICA SINICA,2019,68(15).
APA Fu Peng-Fei,Yu Dan-Ni,Peng Zi-Jian,Gong Jin-Kang,&Ning Zhi-Jun.(2019).Perovskite solar cells passivated by distorted two-dimensional structure.ACTA PHYSICA SINICA,68(15).
MLA Fu Peng-Fei,et al."Perovskite solar cells passivated by distorted two-dimensional structure".ACTA PHYSICA SINICA 68.15(2019).
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Fu Peng-Fei]'s Articles
[Yu Dan-Ni]'s Articles
[Peng Zi-Jian]'s Articles
Baidu academic
Similar articles in Baidu academic
[Fu Peng-Fei]'s Articles
[Yu Dan-Ni]'s Articles
[Peng Zi-Jian]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Fu Peng-Fei]'s Articles
[Yu Dan-Ni]'s Articles
[Peng Zi-Jian]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.