Enhanced coverage of all-inorganic perovskite CsPbBr3 through sequential deposition for green light-emitting diodes
Film morphology has a major influence on the performance of halide perovskite semiconductors, where poor coverage and pinholes are generally detrimental and result in undesirable current leakage. All‐inorganic cesium lead bromide (CsPbBr3) has an advantage of improved stability especially under devi...
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sg-ntu-dr.10356-1408592021-01-08T07:04:28Z Enhanced coverage of all-inorganic perovskite CsPbBr3 through sequential deposition for green light-emitting diodes Ng, Yan Fong Neo, Wei Jian Nur Fadilah Jamaludin Yantara, Natalia Mhaisalkar, Subodh Mathews, Nripan School of Materials Science and Engineering Interdisciplinary Graduate School (IGS) Energy Research Institute @ NTU (ERI@N) Engineering::Materials Cesium Light Emission Film morphology has a major influence on the performance of halide perovskite semiconductors, where poor coverage and pinholes are generally detrimental and result in undesirable current leakage. All‐inorganic cesium lead bromide (CsPbBr3) has an advantage of improved stability especially under device operation, but the low solubility of the ionic precursor CsBr limits the coverage of the solution‐processed film. To tackle this, a sequential deposition technique is proposed whereby PbBr2 is first deposited on a planar substrate prior to exposure to a CsBr solution to initiate conversion to the desired CsPbBr3 phase. This approach essentially nullifies the solubility problem of CsBr and the final perovskite film coverage now chiefly depends on the initial PbBr2 concentration and the duration of exposure to the CsBr solution. With over 90 % film coverage achieved, a proof of concept perovskite light‐emitting diode (PeLED) with green emission at 527 nm has also been achieved, thereby demonstrating the feasibility of this methodology for future device fabrication. NRF (Natl Research Foundation, S’pore) Accepted version 2020-06-02T08:32:57Z 2020-06-02T08:32:57Z 2017 Journal Article Ng, Y. F., Neo, W. J., Nur Fadilah Jamaludin, Yantara, N., Mhaisalkar, S., & Mathews, N. (2017). Enhanced coverage of all-inorganic perovskite CsPbBr3 through sequential deposition for green light-emitting diodes. Energy Technology, 5(10), 1859-1865. doi:10.1002/ente.201700475 2194-4288 https://hdl.handle.net/10356/140859 10.1002/ente.201700475 10 5 1859 1865 en Energy Technology This is the accepted version of the following article: Ng, Y. F., Neo, W. J., Nur Fadilah Jamaludin, Yantara, N., Mhaisalkar, S., & Mathews, N. (2017). Enhanced coverage of all-inorganic perovskite CsPbBr3 through sequential deposition for green light-emitting diodes. Energy Technology, 5(10), 1859-1865, which has been published in final form at dx.doi.org/10.1002/ente.201700475. 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 |
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Engineering::Materials Cesium Light Emission Ng, Yan Fong Neo, Wei Jian Nur Fadilah Jamaludin Yantara, Natalia Mhaisalkar, Subodh Mathews, Nripan Enhanced coverage of all-inorganic perovskite CsPbBr3 through sequential deposition for green light-emitting diodes |
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Film morphology has a major influence on the performance of halide perovskite semiconductors, where poor coverage and pinholes are generally detrimental and result in undesirable current leakage. All‐inorganic cesium lead bromide (CsPbBr3) has an advantage of improved stability especially under device operation, but the low solubility of the ionic precursor CsBr limits the coverage of the solution‐processed film. To tackle this, a sequential deposition technique is proposed whereby PbBr2 is first deposited on a planar substrate prior to exposure to a CsBr solution to initiate conversion to the desired CsPbBr3 phase. This approach essentially nullifies the solubility problem of CsBr and the final perovskite film coverage now chiefly depends on the initial PbBr2 concentration and the duration of exposure to the CsBr solution. With over 90 % film coverage achieved, a proof of concept perovskite light‐emitting diode (PeLED) with green emission at 527 nm has also been achieved, thereby demonstrating the feasibility of this methodology for future device fabrication. |
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School of Materials Science and Engineering |
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School of Materials Science and Engineering Ng, Yan Fong Neo, Wei Jian Nur Fadilah Jamaludin Yantara, Natalia Mhaisalkar, Subodh Mathews, Nripan |
format |
Article |
author |
Ng, Yan Fong Neo, Wei Jian Nur Fadilah Jamaludin Yantara, Natalia Mhaisalkar, Subodh Mathews, Nripan |
author_sort |
Ng, Yan Fong |
title |
Enhanced coverage of all-inorganic perovskite CsPbBr3 through sequential deposition for green light-emitting diodes |
title_short |
Enhanced coverage of all-inorganic perovskite CsPbBr3 through sequential deposition for green light-emitting diodes |
title_full |
Enhanced coverage of all-inorganic perovskite CsPbBr3 through sequential deposition for green light-emitting diodes |
title_fullStr |
Enhanced coverage of all-inorganic perovskite CsPbBr3 through sequential deposition for green light-emitting diodes |
title_full_unstemmed |
Enhanced coverage of all-inorganic perovskite CsPbBr3 through sequential deposition for green light-emitting diodes |
title_sort |
enhanced coverage of all-inorganic perovskite cspbbr3 through sequential deposition for green light-emitting diodes |
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2020 |
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https://hdl.handle.net/10356/140859 |
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1688665320089190400 |