Spontaneous formation of robust two-dimensional perovskite phases.
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| Title: | Spontaneous formation of robust two-dimensional perovskite phases. |
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| Authors: | Tan, Shaun, Shih, Meng-Chen, Lu, Yongli, Choi, Seung-Gu, Dong, Yifan, Lee, Joo-Hong, Yavuz, Ilhan, Larson, Bryon W., Park, So Yeon, Kodalle, Tim, Zhang, Ruiqi, Grotevent, Matthias J., Lin, Yu-Kuan, Zhu, Hua, Bulović, Vladimir, Sutter-Fella, Carolin M., Park, Nam-Gyu, Beard, Matthew C., Lee, Jin-Wook, Zhu, Kai |
| Source: | Science. 5/8/2025, Vol. 388 Issue 6747, p639-645. 7p. |
| Subjects: | Perovskite, Solar cells, Dimethyl sulfoxide, Methylammonium, Isopropyl alcohol |
| Abstract: | The two-dimensional on three-dimensional (2D/3D) perovskite bilayer heterostructure can improve the stability and performance of perovskite solar cells. We show that the 2D/3D perovskite stack in a device evolves dynamically during its end-of-life decomposition. Initially phase-pure 2D interlayers can evolve differently, resulting in different device stabilities. We show that a robust 2D interlayer can be formed using mixed solvents to regulate its crystallinity and phase purity. The resulting 2D/3D devices achieved 25.9% efficiency and had good durability, retaining 91% of their initial performance after 1074 hours at 85°C using maximum power point tracking. Editor's summary: Robust, phase-pure two-dimensional (2D) passivation layers for 3D perovskites stabilize solar cells against degradation under ultraviolet irradiation. Tan et al. found that 2D interlayers based on octylammonium and methylammonium cations formed with a mixed solvent (dimethylsulfoxide and isopropanol) spontaneously formed phase-pure 2D perovskites with high crystallinity. Solar cells based on these 2D or 3D perovskite bilayers had a power conversion efficiency of 25.9% and retained 91% of their initial performance after 1074 hours at 85°C under maximum power point tracking.—Phil Szuromi [ABSTRACT FROM AUTHOR] |
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| Database: | Psychology and Behavioral Sciences Collection |
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| Abstract: | The two-dimensional on three-dimensional (2D/3D) perovskite bilayer heterostructure can improve the stability and performance of perovskite solar cells. We show that the 2D/3D perovskite stack in a device evolves dynamically during its end-of-life decomposition. Initially phase-pure 2D interlayers can evolve differently, resulting in different device stabilities. We show that a robust 2D interlayer can be formed using mixed solvents to regulate its crystallinity and phase purity. The resulting 2D/3D devices achieved 25.9% efficiency and had good durability, retaining 91% of their initial performance after 1074 hours at 85°C using maximum power point tracking. Editor's summary: Robust, phase-pure two-dimensional (2D) passivation layers for 3D perovskites stabilize solar cells against degradation under ultraviolet irradiation. Tan et al. found that 2D interlayers based on octylammonium and methylammonium cations formed with a mixed solvent (dimethylsulfoxide and isopropanol) spontaneously formed phase-pure 2D perovskites with high crystallinity. Solar cells based on these 2D or 3D perovskite bilayers had a power conversion efficiency of 25.9% and retained 91% of their initial performance after 1074 hours at 85°C under maximum power point tracking.—Phil Szuromi [ABSTRACT FROM AUTHOR] |
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| ISSN: | 00368075 |
| DOI: | 10.1126/science.adr1334 |
