Mechanistic insight into α-to-δ phase transition and stabilizing α-phase FAPbI3 via regulating δ-phase orientation
Chuwu Xing, Yongzhe Li, Qinhui Bao, Miao He, Zhiqiang Lu, Yibin Zhang, Zhike Liu, Tianjin Zhang, Duofa Wang · 2026
Read Mechanistic insight into α-to-δ phase transition and stabilizing α-phase FAPbI3 via regulating δ-phase orientation by Chuwu Xing, Yongzhe Li, Qinhui Bao, Miao He, Zhiqiang Lu, Yibin Zhang, Zhike Liu, Tianjin Zhang, Duofa Wang (2026) in the Tower of Babel, a free online library of public-domain works preserved in clean, searchable text. No sign-up. The full text is served as a plain-text file at a predictable URL, where text is present: https://antarctic-labs.com/tower-of-babel/pmc-13396658.txt.
Description
Xing and co-authors explain, in 2026, why formamidinium perovskite solar cells decay, tracing the damage to the interface where the working alpha phase meets the inert delta phase. Their microscopy and diffraction work shows the boundary between the alpha phase's 011 plane and the delta phase's 110 plane carries tensile strain. That makes it the active site where the alpha-to-delta transformation ignites and spreads.
Acting on that mechanism, they seeded the perovskite with two-dimensional perovskitoid material that bonds preferentially to the delta phase's 110 plane, forming a strained 2D-delta interface with 4.24 percent lattice mismatch in the reported analysis. The large strain scrambles delta-phase orientation and blocks formation of the dangerous alpha-delta boundaries. Cells built this way reached 25.61 percent efficiency, and unencapsulated devices kept 90 percent of their initial efficiency after 1,000 hours at 70 percent relative humidity. The authors offer the interface rule as a universal stabilization strategy.
Catalog record
| CREATOR | Chuwu Xing, Yongzhe Li, Qinhui Bao, Miao He, Zhiqiang Lu, Yibin Zhang, Zhike Liu, Tianjin Zhang, Duofa Wang |
|---|---|
| YEAR | 2026 |
| COLLECTION | PAPERS |
| FORMAT | TXT |
| FILE SIZE | 50 KB |
| VERSION | 1.0 |
| LICENSE | CC BY 4.0 |
| RIGHTS | CC BY |
| SOURCE | Europe PMC |