1
|
Cai L, Zhu F. Toward efficient and stable operation of perovskite solar cells: Impact of sputtered metal oxide interlayers. NANO SELECT 2021. [DOI: 10.1002/nano.202000290] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Affiliation(s)
- Linfeng Cai
- Department of Physics Research Centre of Excellence for Organic Electronics and Institute of Advanced Materials Hong Kong Baptist University Hong Kong China
| | - Furong Zhu
- Department of Physics Research Centre of Excellence for Organic Electronics and Institute of Advanced Materials Hong Kong Baptist University Hong Kong China
| |
Collapse
|
2
|
Masood MT, Qudsia S, Hadadian M, Weinberger C, Nyman M, Ahläng C, Dahlström S, Liu M, Vivo P, Österbacka R, Smått JH. Investigation of Well-Defined Pinholes in TiO 2 Electron Selective Layers Used in Planar Heterojunction Perovskite Solar Cells. NANOMATERIALS (BASEL, SWITZERLAND) 2020; 10:E181. [PMID: 31968629 PMCID: PMC7022807 DOI: 10.3390/nano10010181] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/17/2019] [Revised: 01/16/2020] [Accepted: 01/16/2020] [Indexed: 11/16/2022]
Abstract
The recently introduced perovskite solar cell (PSC) technology is a promising candidate for providing low-cost energy for future demands. However, one major concern with the technology can be traced back to morphological defects in the electron selective layer (ESL), which deteriorates the solar cell performance. Pinholes in the ESL may lead to an increased surface recombination rate for holes, if the perovskite absorber layer is in contact with the fluorine-doped tin oxide (FTO) substrate via the pinholes. In this work, we used sol-gel-derived mesoporous TiO2 thin films prepared by block co-polymer templating in combination with dip coating as a model system for investigating the effect of ESL pinholes on the photovoltaic performance of planar heterojunction PSCs. We studied TiO2 films with different porosities and film thicknesses, and observed that the induced pinholes only had a minor impact on the device performance. This suggests that having narrow pinholes with a diameter of about 10 nm in the ESL is in fact not detrimental for the device performance and can even, to some extent improve their performance. A probable reason for this is that the narrow pores in the ordered structure do not allow the perovskite crystals to form interconnected pathways to the underlying FTO substrate. However, for ultrathin (~20 nm) porous layers, an incomplete ESL surface coverage of the FTO layer will further deteriorate the device performance.
Collapse
Affiliation(s)
- Muhammad Talha Masood
- Laboratory of Molecular Science and Engineering, Åbo Akademi University, Porthansgatan 3-5, 20500 Turku, Finland or (S.Q.); (M.H.); (C.W.)
- Department of Materials Engineering, School of Chemical & Materials Engineering, National University of Science & Technology (NUST), Sector H-12, Islamabad 44100, Pakistan
| | - Syeda Qudsia
- Laboratory of Molecular Science and Engineering, Åbo Akademi University, Porthansgatan 3-5, 20500 Turku, Finland or (S.Q.); (M.H.); (C.W.)
| | - Mahboubeh Hadadian
- Laboratory of Molecular Science and Engineering, Åbo Akademi University, Porthansgatan 3-5, 20500 Turku, Finland or (S.Q.); (M.H.); (C.W.)
| | - Christian Weinberger
- Laboratory of Molecular Science and Engineering, Åbo Akademi University, Porthansgatan 3-5, 20500 Turku, Finland or (S.Q.); (M.H.); (C.W.)
- Department of Chemistry—Inorganic Functional Materials, Paderborn University, 33098 Paderborn, Germany
| | - Mathias Nyman
- Physics, Faculty of Science and Engineering, Åbo Akademi University, Porthansgatan 3-5, 20500 Turku, Finland; (M.N.); (C.A.); (S.D.); (R.Ö.)
| | - Christian Ahläng
- Physics, Faculty of Science and Engineering, Åbo Akademi University, Porthansgatan 3-5, 20500 Turku, Finland; (M.N.); (C.A.); (S.D.); (R.Ö.)
| | - Staffan Dahlström
- Physics, Faculty of Science and Engineering, Åbo Akademi University, Porthansgatan 3-5, 20500 Turku, Finland; (M.N.); (C.A.); (S.D.); (R.Ö.)
| | - Maning Liu
- Faculty of Engineering and Natural Sciences, Tampere University, P.O. Box 541, FI-33014 Tampere, Finland; (M.L.); (P.V.)
| | - Paola Vivo
- Faculty of Engineering and Natural Sciences, Tampere University, P.O. Box 541, FI-33014 Tampere, Finland; (M.L.); (P.V.)
| | - Ronald Österbacka
- Physics, Faculty of Science and Engineering, Åbo Akademi University, Porthansgatan 3-5, 20500 Turku, Finland; (M.N.); (C.A.); (S.D.); (R.Ö.)
| | - Jan-Henrik Smått
- Laboratory of Molecular Science and Engineering, Åbo Akademi University, Porthansgatan 3-5, 20500 Turku, Finland or (S.Q.); (M.H.); (C.W.)
| |
Collapse
|