Facile synthesis of a hole transporting material with a silafluorene core for efficient mesoscopic CH3NH3PbI3 perovskite solar cells. Issue 22 (19th May 2016)

• Record Type: Journal Article
• Authors: Krishna, Anurag; Sabba, Dharani; Yin, Jun; Bruno, Annalisa; Antila, Liisa J.; Soci, Cesare; Mhaisalkar, Subodh; Grimsdale, Andrew C.
• Is Part Of: Journal of materials chemistry. Volume 4:Issue 22(2016)
• Page Start: 8750
• Page End: 8754
• Publication Date: 2016-05-19
• Subjects: Materials -- Research -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental sciences -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c6ta01776b
• Languages: English
• ISSNs: 2050-7488

Abstract

Abstract : A power conversion efficiency of 11% has been obtained from a perovskite solar cell using a new silafluorene-based hole transporting material made by a short efficient synthesis. Abstract : A novel electron-rich small-molecule, 4, 4′-(5, 5-dihexyl-5 H -dibenzo[ b, d ]silole-3, 7-diyl)bis( N, N -bis(4-methoxyphenyl)aniline) (S101), containing silafluorene as the core with arylamine side groups, has been synthesized via a short efficient route. When S101 was incorporated into a CH3 NH3 PbI3 perovskite solar cell as a hole transporting material (HTM), a short circuit photocurrent density ( J sc ) of 18.9 mA cm −2, an open circuit voltage ( V oc ) of 0.92 V, and a fill factor (FF) of 0.65 contributing to an overall power conversion efficiency (PCE) of ∼11% which is comparable to the PCE obtained using the current state-of-the-art HTM 2, 2′, 7, 7′-tetrakis( N, N ′-di- p -methoxyphenylamine)-9, 9′-spirobifluorene (spiro-OMeTAD) ( η = 12.3%) were obtained. S101 is thus a promising HTM with the potential to replace the expensive spiro-OMeTAD due to its comparable performance and much simpler and less expensive synthesis route.