Surface molecular doping of all-inorganic perovskite using zethrenes molecules
We present an optical and photoelectron spectroscopic study to elucidate the interfacial electronic properties of organic-inorganic semiconductor heterojunctions formed in a kinetically blocked heptazethrene triisopropylsilyl ethynylene (HZ-TIPS) and its homologue, octazethrene (OZ-TIPS) on an all-i...
| Main Authors: | , , , , , , , , , , , , |
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| Format: | Journal Article |
| Language: | English |
| Published: |
2020
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| Online Access: | https://hdl.handle.net/10356/137245 |
| _version_ | 1824453895203586048 |
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| author | Arramel Pan, Hu Xie, Aozhen Hou, Songyan Yin, Xinmao Tang, Chi Sin Hoa, Nguyen T. Muhammad D. Birowosuto Wang, Hong Dang, Cuong Rusydi, Andrivo Wee Andrew T. S. Wu, Jishan |
| author2 | School of Electrical and Electronic Engineering |
| author_facet | School of Electrical and Electronic Engineering Arramel Pan, Hu Xie, Aozhen Hou, Songyan Yin, Xinmao Tang, Chi Sin Hoa, Nguyen T. Muhammad D. Birowosuto Wang, Hong Dang, Cuong Rusydi, Andrivo Wee Andrew T. S. Wu, Jishan |
| author_sort | Arramel |
| collection | NTU |
| description | We present an optical and photoelectron spectroscopic study to elucidate the interfacial electronic properties of organic-inorganic semiconductor heterojunctions formed in a kinetically blocked heptazethrene triisopropylsilyl ethynylene (HZ-TIPS) and its homologue, octazethrene (OZ-TIPS) on an all-inorganic perovskite cesium lead bromide (CsPbBr3) surface. The photoluminescence behavior of the underlying perovskites upon differing molecular doping conditions was examined. It turns out that the charge transfer dynamics of thermally-evaporated OZ-TIPS molecule exhibited a faster average lifetime than that of the HZ-TIPS case suggesting the importance of the biradical state in the former molecule. An interfacial dipole was formed at the interface due to the competing interaction between the dispersion force of the bulky TIPS-substituent group and the attractive van der Waals interaction at the first few layers. Photoemission spectroscopy of the physisorbed HZ-TIPS shows chemical shifts, which indicates electron transfer from HZ-TIPS molecules to the CsPbBr3 perovskite single crystal. In contrast, the adsorbed OZ-TIPS molecular layer on CsPbBr3 demonstrates the opposite trend indicating a hole transfer process. The average molecular orientation as determined by near edge X-ray absorption fine structure (NEXAFS) suggests that the HZ-TIPS molecular plane is generally lifted with respect to the perovskite surface. We suggest that the nature of the closed-shell electronic ground state of HZ-TIPS could contribute to the formation of interfacial dipole at the molecule/perovskite interface. |
| first_indexed | 2025-02-19T03:13:41Z |
| format | Journal Article |
| id | ntu-10356/137245 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2025-02-19T03:13:41Z |
| publishDate | 2020 |
| record_format | dspace |
| spelling | ntu-10356/1372452021-05-01T20:11:45Z Surface molecular doping of all-inorganic perovskite using zethrenes molecules Arramel Pan, Hu Xie, Aozhen Hou, Songyan Yin, Xinmao Tang, Chi Sin Hoa, Nguyen T. Muhammad D. Birowosuto Wang, Hong Dang, Cuong Rusydi, Andrivo Wee Andrew T. S. Wu, Jishan School of Electrical and Electronic Engineering Energy Research Institute @ NTU (ERI@N) Engineering::Electrical and electronic engineering Zethrene Photoelectron Spectroscopy We present an optical and photoelectron spectroscopic study to elucidate the interfacial electronic properties of organic-inorganic semiconductor heterojunctions formed in a kinetically blocked heptazethrene triisopropylsilyl ethynylene (HZ-TIPS) and its homologue, octazethrene (OZ-TIPS) on an all-inorganic perovskite cesium lead bromide (CsPbBr3) surface. The photoluminescence behavior of the underlying perovskites upon differing molecular doping conditions was examined. It turns out that the charge transfer dynamics of thermally-evaporated OZ-TIPS molecule exhibited a faster average lifetime than that of the HZ-TIPS case suggesting the importance of the biradical state in the former molecule. An interfacial dipole was formed at the interface due to the competing interaction between the dispersion force of the bulky TIPS-substituent group and the attractive van der Waals interaction at the first few layers. Photoemission spectroscopy of the physisorbed HZ-TIPS shows chemical shifts, which indicates electron transfer from HZ-TIPS molecules to the CsPbBr3 perovskite single crystal. In contrast, the adsorbed OZ-TIPS molecular layer on CsPbBr3 demonstrates the opposite trend indicating a hole transfer process. The average molecular orientation as determined by near edge X-ray absorption fine structure (NEXAFS) suggests that the HZ-TIPS molecular plane is generally lifted with respect to the perovskite surface. We suggest that the nature of the closed-shell electronic ground state of HZ-TIPS could contribute to the formation of interfacial dipole at the molecule/perovskite interface. NRF (Natl Research Foundation, S’pore) MOE (Min. of Education, S’pore) Accepted version 2020-03-11T01:44:12Z 2020-03-11T01:44:12Z 2018 Journal Article Arramel, Pan, H., Xie, A., Hou, S., Yin, X., Tang, C. S., . . . Wu, J. (2019). Surface molecular doping of all-inorganic perovskite using zethrenes molecules. Nano Research, 12(1), 77–84. doi:10.1007/s12274-018-2183-9 1998-0124 https://hdl.handle.net/10356/137245 10.1007/s12274-018-2183-9 2-s2.0-85052795750 1 12 77 84 en Nano Research © 2018 Tsinghua University Press and Springer-Verlag GmbH Germany, part of Springer Nature. All rights reserved. This paper was published in Nano Research and is made available with permission of Tsinghua University Press and Springer-Verlag GmbH Germany, part of Springer Nature. application/pdf |
| spellingShingle | Engineering::Electrical and electronic engineering Zethrene Photoelectron Spectroscopy Arramel Pan, Hu Xie, Aozhen Hou, Songyan Yin, Xinmao Tang, Chi Sin Hoa, Nguyen T. Muhammad D. Birowosuto Wang, Hong Dang, Cuong Rusydi, Andrivo Wee Andrew T. S. Wu, Jishan Surface molecular doping of all-inorganic perovskite using zethrenes molecules |
| title | Surface molecular doping of all-inorganic perovskite using zethrenes molecules |
| title_full | Surface molecular doping of all-inorganic perovskite using zethrenes molecules |
| title_fullStr | Surface molecular doping of all-inorganic perovskite using zethrenes molecules |
| title_full_unstemmed | Surface molecular doping of all-inorganic perovskite using zethrenes molecules |
| title_short | Surface molecular doping of all-inorganic perovskite using zethrenes molecules |
| title_sort | surface molecular doping of all inorganic perovskite using zethrenes molecules |
| topic | Engineering::Electrical and electronic engineering Zethrene Photoelectron Spectroscopy |
| url | https://hdl.handle.net/10356/137245 |
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