Low temperature growth (001) facet-oriented p-type FAPbI<sub>3</sub> perovskite solar cells
Various atomic arrangements and coordination of facets significantly influence the photoelectric properties of perovskites. When preparing FAPbI<sub>3</sub> with a (001) crystal facet, the presence of other crystal facets such as (011) or (111) can adversely affect the carrier extraction efficiency and device stability. In this study, the desired (001) orientations of FAPbI<sub>3</sub> are greatly promoted without the presence of other crystal planes attributed to the formation of 2D PEA<sub>2</sub>FA<sub><i>n</i>-1</sub>Pb<sub><i>n</i></sub>I<sub>3<i>n</i>+1</sub>. This enhancement in the crystallographic orientation of FAPbI<sub>3</sub> concurrently enabled a transition in its conductivity type from n-type to p-type. Furthermore, our DFT results revealed that the holes in the (001) facet exhibit superior carrier transport properties in FA-based perovskites. As a result, the devices show a power conversion efficiency of 23.02% with a <i>V</i><sub>oc</sub> of 1.19 V.
Authors
- Xing‐Tao An (ORCID: https://orcid.org/0000-0001-9135-9825)
- Yingke Ren (ORCID: https://orcid.org/0000-0002-0700-9820)
- Junlei Tao (ORCID: https://orcid.org/0000-0002-7326-1055)
- Cuina Gao
- Zhi Li (ORCID: https://orcid.org/0000-0002-6088-7972)
- Chao He (ORCID: https://orcid.org/0000-0002-3970-4270)
- Xiaofei Yin
- Jing Chen (ORCID: https://orcid.org/0000-0003-1099-3766)
Institutions
- Hebei University of Science and Technology (CN)
Publication Details
- Journal
- Chemical Communications
- Published
- 2025-01-01
- DOI
- https://doi.org/10.1039/d5cc02184g
- Citations
- 1
- Primary Topic
- Perovskite Materials and Applications
- Type
- article
- Field-Weighted Citation Impact
- 0.73
Funders
- Hebei Province Outstanding Youth Fund