| Full text | |
| Author(s): |
Szostak, Rodrigo
[1, 2, 3]
;
Sanchez, Sandy
[3]
;
Marchezi, Paulo E.
[1]
;
Marques, Adriano S.
[1]
;
Silva, Jeann C.
[1]
;
Holanda, Matheus S.
[1]
;
Hagfeldt, Anders
[3]
;
Tolentino, Helio C. N.
[2]
;
Nogueira, Ana F.
[1]
Total Authors: 9
|
| Affiliation: | [1] Univ Estadual Campinas, UNICAMP, Lab Nanotecnol & Energia Solar LNES, BR-13083970 Campinas - Brazil
[2] Brazilian Ctr Res Energy & Mat CNPEM, Brazilian Synchrotron Light Lab LNLS, BR-13083100 Campinas - Brazil
[3] Ecole Polytech Fed Lausanne EPFL, Inst Chem Sci & Engn ISIC, Lab Photomol Sci LSPM, CH-1015 Lausanne - Switzerland
Total Affiliations: 3
|
| Document type: | Journal article |
| Source: | ADVANCED FUNCTIONAL MATERIALS; v. 31, n. 4 JAN 2021. |
| Web of Science Citations: | 0 |
| Abstract | |
The optoelectronic properties, morphology, and consequently the performance of metal halide perovskite solar cells are directly related to the crystalline phases and intermediates formed during film preparation. The gas quenching method is compatible with large-area deposition, but an understanding of how this method influences these properties and performance is scarce in the literature. Here, in situ grazing incidence wide angle X-ray scattering is employed during spin coating deposition to gain insights on the formation of MAPbI(3)and Cs(x)FA(1-)(x)Pb(I0.83Br0.17)(3)perovskites, comparing the use of dimethyl sulfoxide (DMSO) and 2-methyl-n-pyrrolidone (NMP) as coordinative solvents. Intermediates formed using DMSO depend on the perovskite composition (e.g., Cs content), while for NMP the same intermediate {[}PbI2(NMP)] is formed independently on the composition. For MAPbI(3)and Cs(x)FA(1-)(x)Pb(I0.83Br0.17)(3)with a small amount of Cs (10% and 20%), the best efficiencies are achieved using NMP, while the use of DMSO is preferred for higher (30% and 40%) amount of Cs. The inhibition of the 2H/4H hexagonal phase when using NMP is crucial for the final performance. These findings provide a deep understanding about the formation mechanism in multication perovskites and assist the community to choose the best solvent for the desired perovskite composition aiming to perovskite-on-silicon tandem solar cells. (AU) | |
| FAPESP's process: | 17/11986-5 - Generation and storage of New Energy: bringing technological development for the country |
| Grantee: | Ana Flávia Nogueira |
| Support Opportunities: | Research Grants - Research Centers in Engineering Program |
| FAPESP's process: | 17/12582-5 - Perovskites with mixed cations: Relationship between structure, composition, electronic properties and efficiency of solar cells |
| Grantee: | Rodrigo Szostak |
| Support Opportunities: | Scholarships in Brazil - Doctorate |