Temperature and electrical poling effects on ionic motion in MAPbI3 photovoltaic cells
Despite their excellent power conversion efficiency, MAPbI3 solar cells exhibit strong hysteresis that hinders reliable device operation. Herein it is shown that ionic motion is the dominant mechanism underlying hysteresis of MAPbI3 solar cells by studying the effects of electrical poling in differe...
| Main Authors: | , , , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2020
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| Online Access: | https://hdl.handle.net/10356/142530 |
| _version_ | 1826124860032548864 |
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| author | Bruno, Annalisa Cortecchia, Daniele Chin, Xin Yu Fu, Kunwu Boix, Pablo P. Mhaisalkar, Subodh Gautam Soci, Cesare |
| author2 | School of Physical and Mathematical Sciences |
| author_facet | School of Physical and Mathematical Sciences Bruno, Annalisa Cortecchia, Daniele Chin, Xin Yu Fu, Kunwu Boix, Pablo P. Mhaisalkar, Subodh Gautam Soci, Cesare |
| author_sort | Bruno, Annalisa |
| collection | NTU |
| description | Despite their excellent power conversion efficiency, MAPbI3 solar cells exhibit strong hysteresis that hinders reliable device operation. Herein it is shown that ionic motion is the dominant mechanism underlying hysteresis of MAPbI3 solar cells by studying the effects of electrical poling in different temperature ranges. Complete suppression of the hysteresis below 170 K is consistent with temperature activated diffusion of I− anions and/or the motion of the MA+ cations. Ionic motion has important effect on the overall efficiency of the MAPbI3 solar cells: the initial decrease of the power conversion efficiency while lowering the operating temperature is recovered and even enhanced up to 20% of its original value by applying an electrical poling. The open circuit voltage significantly increases and the current density fully recovers due to the reduction of the electron extraction barrier at the TiO2/MAPbI3 interface driven by the charge accumulation at the interface. Moreover, beside TiO2/MAPbI3 interfacial charge transfer, charge transport in TiO2 strongly affects the photovoltaic performance, as revealed by MAPbI3/ms‐TiO2 field effect transistors. These results establish the basis to develop effective strategies to mitigate operational instability of perovskites solar cells. |
| first_indexed | 2024-10-01T06:27:34Z |
| format | Journal Article |
| id | ntu-10356/142530 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T06:27:34Z |
| publishDate | 2020 |
| record_format | dspace |
| spelling | ntu-10356/1425302021-01-20T03:02:04Z Temperature and electrical poling effects on ionic motion in MAPbI3 photovoltaic cells Bruno, Annalisa Cortecchia, Daniele Chin, Xin Yu Fu, Kunwu Boix, Pablo P. Mhaisalkar, Subodh Gautam Soci, Cesare School of Physical and Mathematical Sciences Interdisciplinary Graduate School (IGS) Energy Research Institute @ NTU (ERI@N) Research Techno Plaza Engineering::Materials Electrical Poling Hybrid Perovskites Despite their excellent power conversion efficiency, MAPbI3 solar cells exhibit strong hysteresis that hinders reliable device operation. Herein it is shown that ionic motion is the dominant mechanism underlying hysteresis of MAPbI3 solar cells by studying the effects of electrical poling in different temperature ranges. Complete suppression of the hysteresis below 170 K is consistent with temperature activated diffusion of I− anions and/or the motion of the MA+ cations. Ionic motion has important effect on the overall efficiency of the MAPbI3 solar cells: the initial decrease of the power conversion efficiency while lowering the operating temperature is recovered and even enhanced up to 20% of its original value by applying an electrical poling. The open circuit voltage significantly increases and the current density fully recovers due to the reduction of the electron extraction barrier at the TiO2/MAPbI3 interface driven by the charge accumulation at the interface. Moreover, beside TiO2/MAPbI3 interfacial charge transfer, charge transport in TiO2 strongly affects the photovoltaic performance, as revealed by MAPbI3/ms‐TiO2 field effect transistors. These results establish the basis to develop effective strategies to mitigate operational instability of perovskites solar cells. NRF (Natl Research Foundation, S’pore) Accepted version 2020-06-23T09:31:07Z 2020-06-23T09:31:07Z 2017 Journal Article Bruno, A., Cortecchia, D., Chin, X. Y., Fu, K., Boix, P. P., Mhaisalkar, S. G. & Soci, C. (2017). Temperature and electrical poling effects on ionic motion in MAPbI3 photovoltaic cells. Advanced Energy Materials, 7(18), 1700265-. doi:10.1002/aenm.201700265 1614-6832 https://hdl.handle.net/10356/142530 10.1002/aenm.201700265 2-s2.0-85029638485 18 7 en Advanced Energy Materials This is the accepted version of the following article: Bruno, A., Cortecchia, D., Chin, X. Y., Fu, K., Boix, P. P., Mhaisalkar, S. G. & Soci, C. (2017). Temperature and electrical poling effects on ionic motion in MAPbI3 photovoltaic cells. Advanced Energy Materials, 7(18), 1700265-, which has been published in final form at https://doi.org/10.1002/aenm.201700265. This article may be used for non-commercial purposes in accordance with the Wiley Self-Archiving Policy [https://authorservices.wiley.com/authorresources/Journal-Authors/licensing/self-archiving.html]. application/pdf application/pdf |
| spellingShingle | Engineering::Materials Electrical Poling Hybrid Perovskites Bruno, Annalisa Cortecchia, Daniele Chin, Xin Yu Fu, Kunwu Boix, Pablo P. Mhaisalkar, Subodh Gautam Soci, Cesare Temperature and electrical poling effects on ionic motion in MAPbI3 photovoltaic cells |
| title | Temperature and electrical poling effects on ionic motion in MAPbI3 photovoltaic cells |
| title_full | Temperature and electrical poling effects on ionic motion in MAPbI3 photovoltaic cells |
| title_fullStr | Temperature and electrical poling effects on ionic motion in MAPbI3 photovoltaic cells |
| title_full_unstemmed | Temperature and electrical poling effects on ionic motion in MAPbI3 photovoltaic cells |
| title_short | Temperature and electrical poling effects on ionic motion in MAPbI3 photovoltaic cells |
| title_sort | temperature and electrical poling effects on ionic motion in mapbi3 photovoltaic cells |
| topic | Engineering::Materials Electrical Poling Hybrid Perovskites |
| url | https://hdl.handle.net/10356/142530 |
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