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Title: | Improving the Morphology Stability of Spiro-OMeTAD Films for Enhanced Thermal Stability of Perovskite Solar Cells | Authors: | SONG, Wenya Rakocevic, Lucija THIRUVALLUR EACHAMBADI, Ragha Qiu, Weiming Bastos, Joao P. Gehlhaar, Robert KUANG, Yinghuan Hadipour, Afshin AERNOUTS, Tom POORTMANS, Jef |
Issue Date: | 2021 | Publisher: | AMER CHEMICAL SOC | Source: | Acs Applied Materials & Interfaces, 13 (37) , p. 44294 -44301 | Abstract: | To guarantee a long lifetime of perovskite-based photovoltaics, the selected materials need to survive relatively hightemperature stress during the solar cell operation. Highly efficient ni-p perovskite solar cells (PSCs) often degrade at high operational temperatures due to morphological instability of the hole transport material 2,2',7,7'-tetrakis (N,N-di-p-methoxyphenyl-amine)9,9'-spirobifluorene (Spiro-OMeTAD). We discovered that the detrimental large-domain spiro-OMeTAD crystallization is caused by the simultaneous presence of tert-butylpyridine (tBP) additive and gold (Au) as a capping layer. Based on this discovery and our understanding, we demonstrated facile strategies that successfully stabilize the amorphous phase of spiro-OMeTAD film. As a result, the thermal stability of n- i-p PSCs is largely improved. After the spiro-OMeTAD films in the PSCs were stressed for 1032 h at 85 degrees C in the dark in nitrogen environment, reference PSCs retained only 22% of their initial average power conversion efficiency (PCE), while the best target PSCs retained 85% relative average PCE. Our work suggests facile ways to realize efficient and thermally stable spiro-OMeTAD containing n-i-p PSCs. | Notes: | Song, WY; Poortmans, J (corresponding author), IMEC, Partner Solliance & Energyville, B-3600 Genk, Belgium.; Song, WY; Poortmans, J (corresponding author), Katholieke Univ Leuven, Dept Elect Engn ESAT, B-3001 Heverlee, Belgium.; Poortmans, J (corresponding author), UHasselt, Inst Mat Res IMO IMOMEC, B-3590 Diepenbeek, Belgium. wenya.song@imec.be; jef.poortmans@imec.be |
Keywords: | spiro-OMe;TAD;morphology stability;perovskite solar cells;thermal stability;n-i-p | Document URI: | http://hdl.handle.net/1942/35963 | ISSN: | 1944-8244 | e-ISSN: | 1944-8252 | DOI: | 10.1021/acsami.1c11227 | ISI #: | WOS:000700877100042 | Rights: | 2021 American Chemical Society | Category: | A1 | Type: | Journal Contribution | Validations: | ecoom 2022 |
Appears in Collections: | Research publications |
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Enhanced Thermal Stability of Perovskite Solar Cells_revised.pdf | Peer-reviewed author version | 858.44 kB | Adobe PDF | View/Open |
Improving the Morphology Stability of Spiro-OMeTAD Films for Enhanced Thermal Stability of Perovskite Solar Cells _ Enhanced Reader.pdf Restricted Access | Published version | 15 MB | Adobe PDF | View/Open Request a copy |
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