Carbon nanotube-based hybrid hole-transporting material and selective contact for high efficiency perovskite solar cells. Issue 2 (24th December 2015)

• Record Type: Journal Article
• Authors: Aitola, Kerttu; Sveinbjörnsson, Kári; Correa-Baena, Juan-Pablo; Kaskela, Antti; Abate, Antonio; Tian, Ying; Johansson, Erik M. J.; Grätzel, Michael; Kauppinen, Esko I.; Hagfeldt, Anders; Boschloo, Gerrit
• Is Part Of: Energy & environmental science. Volume 9:Issue 2(2016)
• Page Start: 461
• Page End: 466
• Publication Date: 2015-12-24
• Subjects: Energy conversion -- Periodicals; Fuel switching -- Periodicals; Environmental sciences -- Periodicals; Environmental chemistry -- Periodicals; 333.79
• DOI: 10.1039/c5ee03394b
• Languages: English
• ISSNs: 1754-5692

Abstract

Abstract : Hybrid hole-transporting material and selective contact for perovskite solar cells was manufactured by industrially viable materials and methods. Abstract : We demonstrate a high efficiency perovskite solar cell with a hybrid hole-transporting material-counter electrode based on a thin single-walled carbon nanotube (SWCNT) film and a drop-cast 2, 2, 7, -7-tetrakis( N, N -di- p -methoxyphenylamine)-9, 9′-spirobifluorene (Spiro-OMeTAD) hole-transporting material (HTM). The average efficiency of the solar cells was 13.6%, with the record cell yielding 15.5% efficiency. The efficiency of the reference solar cells with spin-coated Spiro-OMeTAD hole-transporting materials (HTMs) and an evaporated gold counter electrode was 17.7% (record 18.8%), that of the cells with only a SWCNT counter electrode (CE) without additional HTM was 9.1% (record 11%) and that of the cells with gold deposited directly on the perovskite layer was 5% (record 6.3%). Our results show that it is possible to manufacture high efficiency perovskite solar cells with thin film (thickness less than 1 μm) completely carbon-based HTM-CEs using industrially upscalable manufacturing methods, such as press-transferred CEs and drop-cast HTMs.