Elucidating the role of disorder and free-carrier recombination kinetics in CH3NH3PbI3 perovskite films
Apart from broadband absorption of solar radiation, the performance of photovoltaic devices is governed by the density and mobility of photogenerated charge carriers. The latter parameters indicate how many free carriers move away from their origin, and how fast, before loss mechanisms such as carri...
| Main Authors: | , , , , , , , , , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2015
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| Online Access: | https://hdl.handle.net/10356/99039 http://hdl.handle.net/10220/38544 |
| _version_ | 1826116631203414016 |
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| author | Chia, Elbert E. M. La-o-vorakiat, Chan Salim, Teddy Kadro, Jeannette Khuc, Mai-Thu Haselsberger, Reinhard Cheng, Liang Xia, Huanxin Gurzadyan, Gagik G. Su, Haibin Lam, Yeng Ming Marcus, Rudolph A. Michel-Beyerle, Maria-Elisabeth |
| author2 | School of Materials Science & Engineering |
| author_facet | School of Materials Science & Engineering Chia, Elbert E. M. La-o-vorakiat, Chan Salim, Teddy Kadro, Jeannette Khuc, Mai-Thu Haselsberger, Reinhard Cheng, Liang Xia, Huanxin Gurzadyan, Gagik G. Su, Haibin Lam, Yeng Ming Marcus, Rudolph A. Michel-Beyerle, Maria-Elisabeth |
| author_sort | Chia, Elbert E. M. |
| collection | NTU |
| description | Apart from broadband absorption of solar radiation, the performance of photovoltaic devices is governed by the density and mobility of photogenerated charge carriers. The latter parameters indicate how many free carriers move away from their origin, and how fast, before loss mechanisms such as carrier recombination occur. However, only lower bounds of these parameters are usually obtained. Here we independently determine both density and mobility of charge carriers in a perovskite film by the use of time-resolved terahertz spectroscopy. Our data reveal the modification of the free carrier response by strong backscattering expected from these heavily disordered perovskite films. The results for different phases and different temperatures show a change of kinetics from two-body recombination at room temperature to three-body recombination at low temperatures. Our results suggest that perovskite-based solar cells can perform well even at low temperatures as long as the three-body recombination has not become predominant. |
| first_indexed | 2024-10-01T04:14:33Z |
| format | Journal Article |
| id | ntu-10356/99039 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T04:14:33Z |
| publishDate | 2015 |
| record_format | dspace |
| spelling | ntu-10356/990392023-02-28T19:47:39Z Elucidating the role of disorder and free-carrier recombination kinetics in CH3NH3PbI3 perovskite films Chia, Elbert E. M. La-o-vorakiat, Chan Salim, Teddy Kadro, Jeannette Khuc, Mai-Thu Haselsberger, Reinhard Cheng, Liang Xia, Huanxin Gurzadyan, Gagik G. Su, Haibin Lam, Yeng Ming Marcus, Rudolph A. Michel-Beyerle, Maria-Elisabeth School of Materials Science & Engineering School of Physical and Mathematical Sciences Apart from broadband absorption of solar radiation, the performance of photovoltaic devices is governed by the density and mobility of photogenerated charge carriers. The latter parameters indicate how many free carriers move away from their origin, and how fast, before loss mechanisms such as carrier recombination occur. However, only lower bounds of these parameters are usually obtained. Here we independently determine both density and mobility of charge carriers in a perovskite film by the use of time-resolved terahertz spectroscopy. Our data reveal the modification of the free carrier response by strong backscattering expected from these heavily disordered perovskite films. The results for different phases and different temperatures show a change of kinetics from two-body recombination at room temperature to three-body recombination at low temperatures. Our results suggest that perovskite-based solar cells can perform well even at low temperatures as long as the three-body recombination has not become predominant. Published version 2015-09-01T06:34:02Z 2019-12-06T20:02:35Z 2015-09-01T06:34:02Z 2019-12-06T20:02:35Z 2015 2015 Journal Article La-o-vorakiat, C., Salim, T., Kadro, J., Khuc, M.-T., Haselsberger, R., Cheng, L., et al. (2015). Elucidating the role of disorder and free-carrier recombination kinetics in CH3NH3PbI3 perovskite films. Nature Communications, 6, 7903-. 2041-1723 https://hdl.handle.net/10356/99039 http://hdl.handle.net/10220/38544 10.1038/ncomms8903 26224196 en Nature communications © 2015 Macmillan Publishers Limited. This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ 7 p. application/pdf |
| spellingShingle | Chia, Elbert E. M. La-o-vorakiat, Chan Salim, Teddy Kadro, Jeannette Khuc, Mai-Thu Haselsberger, Reinhard Cheng, Liang Xia, Huanxin Gurzadyan, Gagik G. Su, Haibin Lam, Yeng Ming Marcus, Rudolph A. Michel-Beyerle, Maria-Elisabeth Elucidating the role of disorder and free-carrier recombination kinetics in CH3NH3PbI3 perovskite films |
| title | Elucidating the role of disorder and free-carrier recombination kinetics in CH3NH3PbI3 perovskite films |
| title_full | Elucidating the role of disorder and free-carrier recombination kinetics in CH3NH3PbI3 perovskite films |
| title_fullStr | Elucidating the role of disorder and free-carrier recombination kinetics in CH3NH3PbI3 perovskite films |
| title_full_unstemmed | Elucidating the role of disorder and free-carrier recombination kinetics in CH3NH3PbI3 perovskite films |
| title_short | Elucidating the role of disorder and free-carrier recombination kinetics in CH3NH3PbI3 perovskite films |
| title_sort | elucidating the role of disorder and free carrier recombination kinetics in ch3nh3pbi3 perovskite films |
| url | https://hdl.handle.net/10356/99039 http://hdl.handle.net/10220/38544 |
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