Additive selection strategy for high performance perovskite photovoltaics
Although much of the initial progress in perovskite solar cells has been made by the archetypal CH3NH3PbI3, incorporation of an additional cation such as formamidinium, cesium, and mixed halides have shown promising results in both stability and device performance. However, the role of the additiona...
| Main Authors: | , , , , , , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
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2020
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| Online Access: | https://hdl.handle.net/10356/141110 |
| _version_ | 1811680456344600576 |
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| author | Han, Guifang Hadi, Harri Dharma Bruno, Annalisa Kulkarni, Sneha Avinash Koh, Teck Ming Wong, Lydia Helena Soci, Cesare Mathews, Nripan Zhang, Sam Mhaisalkar, Subodh Gautam |
| author2 | School of Materials Science and Engineering |
| author_facet | School of Materials Science and Engineering Han, Guifang Hadi, Harri Dharma Bruno, Annalisa Kulkarni, Sneha Avinash Koh, Teck Ming Wong, Lydia Helena Soci, Cesare Mathews, Nripan Zhang, Sam Mhaisalkar, Subodh Gautam |
| author_sort | Han, Guifang |
| collection | NTU |
| description | Although much of the initial progress in perovskite solar cells has been made by the archetypal CH3NH3PbI3, incorporation of an additional cation such as formamidinium, cesium, and mixed halides have shown promising results in both stability and device performance. However, the role of the additional cations as well as the mixed halides is yet to be fully understood. In this work, we investigate the role of different additives including group I alkali metal cations (K, Rb, Cs and NH4) and halide anions (Br and I) on double-cation perovskites, i.e., [(MAPbBr3)0.15(FAPbI3)0.85]. A notably longer charge carrier lifetime is achieved for perovskite films with additives and may be attributed to defect passivation. Selection rules are put forward based on the effect of the ionic size of an additive on phase stabilization and defect passivation. Addition of complementary size cation with respect to cation size of the parent perovskite, mainly helps stabilizing the perovskite phase by tuning tolerance factor, while addition of the similar size cation/anion, acts as defect passivator. The performance improvement of devices fabricated using NH4I as additive well supports this hypothesis, and offers yet another pathway toward harnessing the multitude of perovskite compositions to achieve high performing solar cells and perhaps other optoelectronic devices. |
| first_indexed | 2024-10-01T03:25:20Z |
| format | Journal Article |
| id | ntu-10356/141110 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T03:25:20Z |
| publishDate | 2020 |
| record_format | dspace |
| spelling | ntu-10356/1411102021-01-06T03:04:07Z Additive selection strategy for high performance perovskite photovoltaics Han, Guifang Hadi, Harri Dharma Bruno, Annalisa Kulkarni, Sneha Avinash Koh, Teck Ming Wong, Lydia Helena Soci, Cesare Mathews, Nripan Zhang, Sam Mhaisalkar, Subodh Gautam School of Materials Science and Engineering School of Physical and Mathematical Sciences Energy Research Institute @ NTU (ERI@N) Research Techno Plaza Engineering::Materials Additives Solar Cells Although much of the initial progress in perovskite solar cells has been made by the archetypal CH3NH3PbI3, incorporation of an additional cation such as formamidinium, cesium, and mixed halides have shown promising results in both stability and device performance. However, the role of the additional cations as well as the mixed halides is yet to be fully understood. In this work, we investigate the role of different additives including group I alkali metal cations (K, Rb, Cs and NH4) and halide anions (Br and I) on double-cation perovskites, i.e., [(MAPbBr3)0.15(FAPbI3)0.85]. A notably longer charge carrier lifetime is achieved for perovskite films with additives and may be attributed to defect passivation. Selection rules are put forward based on the effect of the ionic size of an additive on phase stabilization and defect passivation. Addition of complementary size cation with respect to cation size of the parent perovskite, mainly helps stabilizing the perovskite phase by tuning tolerance factor, while addition of the similar size cation/anion, acts as defect passivator. The performance improvement of devices fabricated using NH4I as additive well supports this hypothesis, and offers yet another pathway toward harnessing the multitude of perovskite compositions to achieve high performing solar cells and perhaps other optoelectronic devices. NRF (Natl Research Foundation, S’pore) MOE (Min. of Education, S’pore) Accepted version 2020-06-04T03:20:47Z 2020-06-04T03:20:47Z 2018 Journal Article Han, G., Hadi, H. D., Bruno, A., Kulkarni, S. A., Koh, T. M., Wong, L. H., . . . Mhaisalka, S. G. (2018). Additive selection strategy for high performance perovskite photovoltaics. The Journal of Physical Chemistry C, 122(25), 13884-13893. doi:10.1021/acs.jpcc.8b00980 1932-7447 https://hdl.handle.net/10356/141110 10.1021/acs.jpcc.8b00980 2-s2.0-85049412952 25 122 13884 13893 en The Journal of Physical Chemistry C This document is the Accepted Manuscript version of a Published Work that appeared in final form in The Journal of Physical Chemistry C, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/acs.jpcc.8b00980 application/pdf |
| spellingShingle | Engineering::Materials Additives Solar Cells Han, Guifang Hadi, Harri Dharma Bruno, Annalisa Kulkarni, Sneha Avinash Koh, Teck Ming Wong, Lydia Helena Soci, Cesare Mathews, Nripan Zhang, Sam Mhaisalkar, Subodh Gautam Additive selection strategy for high performance perovskite photovoltaics |
| title | Additive selection strategy for high performance perovskite photovoltaics |
| title_full | Additive selection strategy for high performance perovskite photovoltaics |
| title_fullStr | Additive selection strategy for high performance perovskite photovoltaics |
| title_full_unstemmed | Additive selection strategy for high performance perovskite photovoltaics |
| title_short | Additive selection strategy for high performance perovskite photovoltaics |
| title_sort | additive selection strategy for high performance perovskite photovoltaics |
| topic | Engineering::Materials Additives Solar Cells |
| url | https://hdl.handle.net/10356/141110 |
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