Effects of Overnight Oxidation on Perovskite Solar Cells with Co(III)TFSI Co-Doped Spiro-OMeTAD
Metal-halide perovskite solar cells (PSCs) have achieved remarkable power conversion efficiencies in recent years, and spiro-OMeTAD plays a significant role as a hole transport material in PSCs with record efficiencies. However, further studies and systematic experimental procedures on doped spiro-O...
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MDPI AG
2022-12-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/16/1/354 |
| _version_ | 1797625927206699008 |
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| author | Laxmi Nakka Armin Gerhard Aberle Fen Lin |
| author_facet | Laxmi Nakka Armin Gerhard Aberle Fen Lin |
| author_sort | Laxmi Nakka |
| collection | DOAJ |
| description | Metal-halide perovskite solar cells (PSCs) have achieved remarkable power conversion efficiencies in recent years, and spiro-OMeTAD plays a significant role as a hole transport material in PSCs with record efficiencies. However, further studies and systematic experimental procedures on doped spiro-OMeTAD are required to enable a reliable process for potential commercialization. In particular, the effect of the prolonged oxidation of Co(III)TFSI co-doped spiro-OMeTAD has been one of the unanswered topics in PSC research. In this work, we investigate the influence of overnight oxidation on the performance of PSCs with Co(III)TFSI co-doped spiro-OMeTAD. Co-doping spiro-OMeTAD with Co(III) complexes instantly oxidizes spiro-OMeTAD, leading to an improvement in power conversion efficiency (PCE) from 13.1% (LiTFSI-doped spiro-OMeTAD) to 17.6% (LiTFSI + Co(III)TFSI-doped spiro-OMeTAD). It is found that PSCs with spiro-OMeTAD co-doped with Co(III)TFSI without overnight oxidation could retain around 90% of the efficiency under maximum power point tracking at 1-sun illumination for 3000 min, whereas the efficiencies drop by more than 30% when Co(III)TFSI co-doped spiro-OMeTAD is exposed to overnight oxidation. Hence, it is important to inhibit the unnecessary overnight oxidation of Co(III)TFSI co-doped spiro-OMeTAD so as to save excess fabrication time and overcome the poor stability issues. |
| first_indexed | 2024-03-11T10:03:24Z |
| format | Article |
| id | doaj.art-e3972dda1c164066a7e7b32f23610cdb |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-11T10:03:24Z |
| publishDate | 2022-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-e3972dda1c164066a7e7b32f23610cdb2023-11-16T15:18:01ZengMDPI AGEnergies1996-10732022-12-0116135410.3390/en16010354Effects of Overnight Oxidation on Perovskite Solar Cells with Co(III)TFSI Co-Doped Spiro-OMeTADLaxmi Nakka0Armin Gerhard Aberle1Fen Lin2Solar Energy Research Institute of Singapore (SERIS), National University of Singapore, Singapore 117574, SingaporeSolar Energy Research Institute of Singapore (SERIS), National University of Singapore, Singapore 117574, SingaporeSolar Energy Research Institute of Singapore (SERIS), National University of Singapore, Singapore 117574, SingaporeMetal-halide perovskite solar cells (PSCs) have achieved remarkable power conversion efficiencies in recent years, and spiro-OMeTAD plays a significant role as a hole transport material in PSCs with record efficiencies. However, further studies and systematic experimental procedures on doped spiro-OMeTAD are required to enable a reliable process for potential commercialization. In particular, the effect of the prolonged oxidation of Co(III)TFSI co-doped spiro-OMeTAD has been one of the unanswered topics in PSC research. In this work, we investigate the influence of overnight oxidation on the performance of PSCs with Co(III)TFSI co-doped spiro-OMeTAD. Co-doping spiro-OMeTAD with Co(III) complexes instantly oxidizes spiro-OMeTAD, leading to an improvement in power conversion efficiency (PCE) from 13.1% (LiTFSI-doped spiro-OMeTAD) to 17.6% (LiTFSI + Co(III)TFSI-doped spiro-OMeTAD). It is found that PSCs with spiro-OMeTAD co-doped with Co(III)TFSI without overnight oxidation could retain around 90% of the efficiency under maximum power point tracking at 1-sun illumination for 3000 min, whereas the efficiencies drop by more than 30% when Co(III)TFSI co-doped spiro-OMeTAD is exposed to overnight oxidation. Hence, it is important to inhibit the unnecessary overnight oxidation of Co(III)TFSI co-doped spiro-OMeTAD so as to save excess fabrication time and overcome the poor stability issues.https://www.mdpi.com/1996-1073/16/1/354spiro-OMeTADdopingoxidationperovskite solar cell |
| spellingShingle | Laxmi Nakka Armin Gerhard Aberle Fen Lin Effects of Overnight Oxidation on Perovskite Solar Cells with Co(III)TFSI Co-Doped Spiro-OMeTAD Energies spiro-OMeTAD doping oxidation perovskite solar cell |
| title | Effects of Overnight Oxidation on Perovskite Solar Cells with Co(III)TFSI Co-Doped Spiro-OMeTAD |
| title_full | Effects of Overnight Oxidation on Perovskite Solar Cells with Co(III)TFSI Co-Doped Spiro-OMeTAD |
| title_fullStr | Effects of Overnight Oxidation on Perovskite Solar Cells with Co(III)TFSI Co-Doped Spiro-OMeTAD |
| title_full_unstemmed | Effects of Overnight Oxidation on Perovskite Solar Cells with Co(III)TFSI Co-Doped Spiro-OMeTAD |
| title_short | Effects of Overnight Oxidation on Perovskite Solar Cells with Co(III)TFSI Co-Doped Spiro-OMeTAD |
| title_sort | effects of overnight oxidation on perovskite solar cells with co iii tfsi co doped spiro ometad |
| topic | spiro-OMeTAD doping oxidation perovskite solar cell |
| url | https://www.mdpi.com/1996-1073/16/1/354 |
| work_keys_str_mv | AT laxminakka effectsofovernightoxidationonperovskitesolarcellswithcoiiitfsicodopedspiroometad AT armingerhardaberle effectsofovernightoxidationonperovskitesolarcellswithcoiiitfsicodopedspiroometad AT fenlin effectsofovernightoxidationonperovskitesolarcellswithcoiiitfsicodopedspiroometad |