+ Resolve Article
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter

+ Translate
+ Subscribe to Site Feed
GeoScience Most Shared ContentMost Shared Content

Chloride Incorporation Process in CH₃NH₃PbI(3-x)Cl(x) Perovskites via Nanoscale Bandgap Maps

, : Chloride Incorporation Process in CH₃NH₃PbI(3-x)Cl(x) Perovskites via Nanoscale Bandgap Maps. Nano Letters 15(12): 8114-8121

CH3NH3PbI(3-x)Cl(x) perovskites enable fabrication of highly efficient solar cells. Chloride ions benefit the morphology, carrier diffusion length, and stability of perovskite films; however, whether those benefits stem from the presence of Cl(-) in the precursor solution or from their incorporation in annealed films is debated. In this work, the photothermal-induced resonance, an in situ technique with nanoscale resolution, is leveraged to measure the bandgap of CH3NH3PbI(3-x)Cl(x) films obtained by a multicycle coating process that produces high efficiency (∼16%) solar cells. Because chloride ions modify the perovskite lattice, thereby widening the bandgap, measuring the bandgap locally yields the local chloride content. After a mild annealing (60 min, 60 °C) the films consist of Cl-rich (x < 0.3) and Cl-poor phases that upon further annealing (110 °C) evolve into a homogeneous Cl-poorer (x < 0.06) phase, suggesting that methylammonium-chrloride is progressively expelled from the film. Despite the small chloride content, CH3NH3PbI(3-x)Cl(x) films show better thermal stability up to 140 °C with respect CH3NH3PbI3 films fabricated with the same methodology.


PMID: 26528710

DOI: 10.1021/acs.nanolett.5b03556

Other references

Stern, Wl, 1973: The wood collection--what should be its future?. Arnoldia 33 (1) 67-80

Weekes, D., 2009: Nurses given power to remove antisocial patients and relatives. Senior nurses can order the removal of people causing disturbance in hospitals after a change in the law took effect last week.

Kalinina N.P., 1971: Some regularities in the development of alcoholic delusions of jealousy. Zhurnal Nevropatologii i Psikhiatrii Imeni S S Korsakova 71(7): 1044-1049

Bachlinski Robert; HalLas StanislLaw, 2002: K-Ar dating of biotite from the Kudowa Zdroj granitoids (central Sudetes, SW Poland). Bulletin of the Polish Academy of Sciences, Earth Sciences 50(2): 113-116

Sidorov, N.F., 1995: Efficiency of nitrogenous dressing for winter wheat depending on preceding crops, fertility of soddy-podzolic soils and hydrothermal conditions of spring-summer growing period. Agrokhimiya 0(9): 53-60

Pereira, T.M.; Vieira, A.Paula.; Fernandes, Jé.Carlos.; Antunes, H.; Basto, A.Sousa., 2006: Anti-TNF-alpha therapy in childhood pustular psoriasis. It has been suggested that reactivation of human herpesvirus 6 (HHV-6) infection may be involved in the pathogenesis of drug-induced hypersensitivity syndrome. We report a 45-year-old Japanese man who developed a generalized papuloerythematous ras...

Fedkiw, John, 1987: Coming back to market value and valuation for the Great Lakes fisheries. Transactions of the American Fisheries Society 116: 6-51

Laurent, K., 2008: Rural housing in the bocage from the 15th to the 19th century: the example of the region of Saint-Sever-Calvados. Annales de Normandie 51(4): 291-306

Herberg, D.; Mechelke, K., 1963: On neural, blood circulation-related influences on respiration. Verhandlungen der Deutschen Gesellschaft für Kreislaufforschung 28: 431-434

Meyer, M.N., 1971: Peculiarities of reproduction and postembryonic development of Microtus transcaspicus Satunin, 1905 with reference to its taxonomic status. Zool Zh, 50: 916-922