High performance ambient-air-stable FAPbI3 perovskite solar cells with molecule-passivated Ruddlesden–Popper/3D heterostructured film
Smilgies, Detlef M.
KAUST DepartmentChemical Science Program
KAUST Solar Center (KSC)
Material Science and Engineering Program
Office of the VP
Organic Electronics and Photovoltaics Group
Physical Science and Engineering (PSE) Division
Permanent link to this recordhttp://hdl.handle.net/10754/630694
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AbstractAmbient stability remains a critical hurdle for commercialization of perovskite solar cells. Two-dimensional Ruddlesden-Popper (RP) perovskite solar cells exhibit excellent stability but suffer from low photovoltaic performance so far. Herein, a RP/3D heterostructure passivated by semiconducting molecules is reported, which systematically addresses both charge dynamics and degradation mechanisms in concert for cesium-free FAPbI solar cells, delivering a power-conversion efficiency as high as 20.62% and remarkable long-term ambient stability with a t lifetime exceeding 2880 hours without encapsulation. In situ characterizations were carried out to gain insight into structural evolution and crystal growth mechanisms during spin coating. Comprehensive film and device characterizations were performed to understand the influences of the RP perovskite and molecule passivation on the film quality, photovoltaic performance and degradation mechanisms. This enables fabrication of a superior quality film with significantly improved optoelectronic properties, which lead to higher charge collection efficiency. The underlying mitigated degradation mechanisms of the passivated RP/3D devices were further elucidated. The understanding of the necessity of addressing both the charge dynamics and degradation mechanisms of solar cells will guide the future design and fabrication of chemically stable, high-efficiency photovoltaic devices.
CitationNiu T, Lu J, Tang M-C, Barrit D, Smilgies D-M, et al. (2018) High performance ambient-air-stable FAPbI3 perovskite solar cells with molecule-passivated Ruddlesden–Popper/3D heterostructured film. Energy & Environmental Science 11: 3358–3366. Available: http://dx.doi.org/10.1039/c8ee02542h.
SponsorsThis work was supported by the National Key Research and Development Program of China (2017YFA0204800, 2016YFA0202403), National Natural Science Foundation of China (61604092, 61674098), National University Research Fund (GK201802005), the 111 Project (B14041), the National 1000 Talents Plan program (1110010341), and the King Abdullah University for Science and Technology (KAUST). GIWAXS measurements were performed on the D-line of the Cornell High Energy Synchrotron Source (CHESS). CHESS is supported by the NSF Award DMR-1332208.
PublisherRoyal Society of Chemistry (RSC)
JournalEnergy & Environmental Science