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Transporting holes stably under iodide invasion in efficient perovskite solar cells.
- Source :
-
Science . 9/9/2022, Vol. 377 Issue 6611, p1227-1232. 6p. 1 Color Photograph, 3 Graphs. - Publication Year :
- 2022
-
Abstract
- Highly efficient halide perovskite solar cells generally rely on lithium-doped organic hole transporting layers that are thermally and chemically unstable, in part because of migration of iodide anions from the perovskite layer. We report a solution strategy to stabilize the hole transport in organic layers by ionic coupling positive polymer radicals and molecular anions through an ion-exchange process. The target layer exhibited a hole conductivity that was 80 times higher than that of the conventional lithium-doped layer. Moreover, after extreme iodide invasion caused by light-soaking at 85°C for 200 hours, the target layer maintained high hole conductivity and well-matched band alignment. This ion-exchange strategy enabled fabrication of perovskite solar cells with a certified power conversion efficiency of 23.9% that maintained 92% under standard illumination at 85°C after 1000 hours. [ABSTRACT FROM AUTHOR]
- Subjects :
- *PEROVSKITE
*SOLAR cells
*IODIDES
*HALIDES
*COUPLING reactions (Chemistry)
Subjects
Details
- Language :
- English
- ISSN :
- 00368075
- Volume :
- 377
- Issue :
- 6611
- Database :
- Academic Search Index
- Journal :
- Science
- Publication Type :
- Academic Journal
- Accession number :
- 158972165
- Full Text :
- https://doi.org/10.1126/science.abq6235