Journal
CHEMPLUSCHEM
Volume 86, Issue 8, Pages 1044-1048Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cplu.202000777
Keywords
crystal growth; perovskites; solar cells; thermal annealing; thin films
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Funding
- European Union's Horizon 2020 research and innovation program [785219, 881603]
- European Union's MSCA-ITN ULTIMATE project [813036]
- Italian Ministry of Foreign Affairs and International Cooperation (MAECI) through Cooperation Project GINGSENG between Italy and China [PGR05249]
- European Research Council (ERC) Starting Grant 2018 under the European Union's Horizon 2020 research and innovation programme [802862]
- Marie Curie Actions (MSCA) [813036] Funding Source: Marie Curie Actions (MSCA)
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This study successfully developed a new method to create mixed-cation low-dimensional perovskite films, demonstrating high crystal quality and enhanced carrier lifetime characteristics, doubling the power conversion efficiency to 15% in reference devices.
Low-dimensional perovskites (LDP) are nowadays recognized as promising materials for the realization of highly performing photovoltaic cells. However, issues related to film morphology, composition, crystal quality and material homogeneity limit the device performances and reproducibility. In this work, we implement a robust method for the deposition of a LDP mixing methylammonium (MA) and phenylethylammonium (PEA) cations to create the mixed system (PEA)(2)MA(39)Pb(40)I(121) by using a two-step thermal annealing treatment (at 60 and 100 degrees C). Our approach results in LDP films with high crystal quality and enhanced carrier lifetime, which double the power conversion efficiency of reference devices, reaching up to 15 %.
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