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Lead halide–templated crystallization of methylamine-free perovskite for efficient photovoltaic modules.
- Source :
-
Science . 6/18/2021, Vol. 372 Issue 6548, p1327-1332. 6p. 4 Diagrams. - Publication Year :
- 2021
-
Abstract
- Upscaling efficient and stable perovskite layers is one of the most challenging issues in the commercialization of perovskite solar cells. Here, a lead halide–templated crystallization strategy is developed for printing formamidinium (FA)–cesium (Cs) lead triiodide perovskite films. High-quality large-area films are achieved through controlled nucleation and growth of a lead halide•N-methyl-2-pyrrolidone adduct that can react in situ with embedded FAI/CsI to directly form a-phase perovskite, sidestepping the phase transformation from d-phase. A nonencapsulated device with 23% efficiency and excellent long-term thermal stability (at 85°C) in ambient air (~80% efficiency retention after 500 hours) is achieved with further addition of potassium hexafluorophosphate. The slot die–printed minimodules achieve champion efficiencies of 20.42% (certified efficiency 19.3%) and 19.54% with an active area of 17.1 and 65.0 square centimeters, respectively. [ABSTRACT FROM AUTHOR]
- Subjects :
- *LEAD halides
*LEAD compounds
*CRYSTALLIZATION
*METHYLAMINES
*PEROVSKITE
Subjects
Details
- Language :
- English
- ISSN :
- 00368075
- Volume :
- 372
- Issue :
- 6548
- Database :
- Academic Search Index
- Journal :
- Science
- Publication Type :
- Academic Journal
- Accession number :
- 150958427
- Full Text :
- https://doi.org/10.1126/science.abh1035