Cesium-oleate passivation for stable provskite photovoltaics
Despite their emergence as promising materials for low-cost and efficient energy power generation technology, hybrid organ-ic-inorganic lead-halide perovskites’ instability towards moisture and heat stress remains a serious obstacle that needs to be tackled for commercialization. Here, we show impro...
| Main Authors: | , , , , , , , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2020
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/140459 |
| _version_ | 1826118897948950528 |
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| author | Guo, Xintong Koh, Teck Ming Febriansyah, Benny Han, Guifang Bhaumik, Saikat Li, Jia Nur Fadilah Jamaludin Ghosh, Biplab Chen, Xiaodong Mhaisalkar, Subodh Mathews, Nripan |
| author2 | School of Materials Science & Engineering |
| author_facet | School of Materials Science & Engineering Guo, Xintong Koh, Teck Ming Febriansyah, Benny Han, Guifang Bhaumik, Saikat Li, Jia Nur Fadilah Jamaludin Ghosh, Biplab Chen, Xiaodong Mhaisalkar, Subodh Mathews, Nripan |
| author_sort | Guo, Xintong |
| collection | NTU |
| description | Despite their emergence as promising materials for low-cost and efficient energy power generation technology, hybrid organ-ic-inorganic lead-halide perovskites’ instability towards moisture and heat stress remains a serious obstacle that needs to be tackled for commercialization. Here, we show improved moisture and thermal stability through the use of cesium oleate to modify the perovskite/hole transporting material (HTM) interface. Passivation using cesium oleate does not induce the for-mation of any low dimensional perovskites, suggesting that the organic species only passivates the perovskite’s surface and grain boundaries. As a result, enhanced hydrophobic character of perovskite film is realized upon passivation, evidenced by high water contact angle of 107.4 degree and improved stability at ambient condition (relative humidity of ~70%, room tem-perature). Concomitantly, the proposed passivation strategy leads to increased amount of cesium concentration within the films, resulting in beneficial enhanced thermal stability of the film at 85oC. By maintaining the three-dimensional (3D) structure of the solar absorber while concurrently passivating the interfacial defects and vacancies, improved open-circuit voltage (Voc) and unsacrificed short-circuit current density (Jsc) were obtained from the treated devices, leading to power conversion effi-ciencies of over 18%. When stored in a humid environment (relative humidity of ~55%), devices with cesium oleate passivation maintain 88% of its initial PCEs after 720 hours, degrading two times slower than those of the control. This work offers a strat-egy of coating 3D perovskites with unique combination of inorganic cation and long chain organics to provide hydrophobicity and moisture stability to the solar absorber layer, while maintaining good device performances. |
| first_indexed | 2024-10-01T04:51:04Z |
| format | Journal Article |
| id | ntu-10356/140459 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T04:51:04Z |
| publishDate | 2020 |
| record_format | dspace |
| spelling | ntu-10356/1404592021-01-06T08:12:28Z Cesium-oleate passivation for stable provskite photovoltaics Guo, Xintong Koh, Teck Ming Febriansyah, Benny Han, Guifang Bhaumik, Saikat Li, Jia Nur Fadilah Jamaludin Ghosh, Biplab Chen, Xiaodong Mhaisalkar, Subodh Mathews, Nripan School of Materials Science & Engineering Interdisciplinary Graduate School (IGS) Energy Research Institute @ NTU (ERI@N) Engineering Science Engineering::Materials Surface Passivation Cs-oleate Despite their emergence as promising materials for low-cost and efficient energy power generation technology, hybrid organ-ic-inorganic lead-halide perovskites’ instability towards moisture and heat stress remains a serious obstacle that needs to be tackled for commercialization. Here, we show improved moisture and thermal stability through the use of cesium oleate to modify the perovskite/hole transporting material (HTM) interface. Passivation using cesium oleate does not induce the for-mation of any low dimensional perovskites, suggesting that the organic species only passivates the perovskite’s surface and grain boundaries. As a result, enhanced hydrophobic character of perovskite film is realized upon passivation, evidenced by high water contact angle of 107.4 degree and improved stability at ambient condition (relative humidity of ~70%, room tem-perature). Concomitantly, the proposed passivation strategy leads to increased amount of cesium concentration within the films, resulting in beneficial enhanced thermal stability of the film at 85oC. By maintaining the three-dimensional (3D) structure of the solar absorber while concurrently passivating the interfacial defects and vacancies, improved open-circuit voltage (Voc) and unsacrificed short-circuit current density (Jsc) were obtained from the treated devices, leading to power conversion effi-ciencies of over 18%. When stored in a humid environment (relative humidity of ~55%), devices with cesium oleate passivation maintain 88% of its initial PCEs after 720 hours, degrading two times slower than those of the control. This work offers a strat-egy of coating 3D perovskites with unique combination of inorganic cation and long chain organics to provide hydrophobicity and moisture stability to the solar absorber layer, while maintaining good device performances. NRF (Natl Research Foundation, S’pore) Accepted version 2020-05-29T05:48:11Z 2020-05-29T05:48:11Z 2019 Journal Article Guo, X., Koh, T. M., Febriansyah, B., Han, G., Bhaumik, S., Li, J., . . . Mathews, N. (2019). Cesium oleate passivation for stable perovskite photovoltaics. ACS Applied Materials & Interfaces, 11(31), 27882–27889. doi:10.1021/acsami.9b08026 1944-8244 https://hdl.handle.net/10356/140459 10.1021/acsami.9b08026 31 11 27882 27889 en ACS Applied Materials & Interfaces This document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Applied Materials & Interfaces, 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/acsami.9b08026. application/pdf |
| spellingShingle | Engineering Science Engineering::Materials Surface Passivation Cs-oleate Guo, Xintong Koh, Teck Ming Febriansyah, Benny Han, Guifang Bhaumik, Saikat Li, Jia Nur Fadilah Jamaludin Ghosh, Biplab Chen, Xiaodong Mhaisalkar, Subodh Mathews, Nripan Cesium-oleate passivation for stable provskite photovoltaics |
| title | Cesium-oleate passivation for stable provskite photovoltaics |
| title_full | Cesium-oleate passivation for stable provskite photovoltaics |
| title_fullStr | Cesium-oleate passivation for stable provskite photovoltaics |
| title_full_unstemmed | Cesium-oleate passivation for stable provskite photovoltaics |
| title_short | Cesium-oleate passivation for stable provskite photovoltaics |
| title_sort | cesium oleate passivation for stable provskite photovoltaics |
| topic | Engineering Science Engineering::Materials Surface Passivation Cs-oleate |
| url | https://hdl.handle.net/10356/140459 |
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