Achieving Order in Disorder: Stabilizing Red Light-Emitting α-Phase Formamidinium Lead Iodide
While formamidinium lead iodide (FAPbI<sub>3</sub>) halide perovskite (HP) exhibits improved thermal stability and a wide band gap, its practical applicability is chained due to its room temperature phase transition from pure black (α-phase) to a non-perovskite yellow (δ-phase) when expo...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-11-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/13/23/3049 |
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| author | Aditya Narayan Singh Atanu Jana Manickam Selvaraj Mohammed A. Assiri Sua Yun Kyung-Wan Nam |
| author_facet | Aditya Narayan Singh Atanu Jana Manickam Selvaraj Mohammed A. Assiri Sua Yun Kyung-Wan Nam |
| author_sort | Aditya Narayan Singh |
| collection | DOAJ |
| description | While formamidinium lead iodide (FAPbI<sub>3</sub>) halide perovskite (HP) exhibits improved thermal stability and a wide band gap, its practical applicability is chained due to its room temperature phase transition from pure black (α-phase) to a non-perovskite yellow (δ-phase) when exposed to humidity. This phase transition is due to the fragile ionic bonding between the cationic and anionic parts of HPs during their formation. Herein, we report the synthesis of water-stable, red-light-emitting α-phase FAPbI<sub>3</sub> nanocrystals (NCs) using five different amines to overcome these intrinsic phase instabilities. The structural, morphological, and electronic characterization were obtained using X-ray diffraction (XRD), field emission scanning electron microscope (FESEM), and X-ray photoelectron spectroscopy (XPS), respectively. The photoluminescence (PL) emission and single-particle imaging bear the signature of dual emission in several amines, indicating a self-trapped excited state. Our simple strategy to stabilize the α-phase using various amine interfacial interactions could provide a better understanding and pave the way for a novel approach for the stabilization of perovskites for prolonged durations and their multifunctional applications. |
| first_indexed | 2024-03-09T01:45:44Z |
| format | Article |
| id | doaj.art-2bbf993e23404d17a96a1251237fb83e |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-09T01:45:44Z |
| publishDate | 2023-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-2bbf993e23404d17a96a1251237fb83e2023-12-08T15:23:01ZengMDPI AGNanomaterials2079-49912023-11-011323304910.3390/nano13233049Achieving Order in Disorder: Stabilizing Red Light-Emitting α-Phase Formamidinium Lead IodideAditya Narayan Singh0Atanu Jana1Manickam Selvaraj2Mohammed A. Assiri3Sua Yun4Kyung-Wan Nam5Department of Energy and Materials Engineering, Dongguk University—Seoul, Seoul 04620, Republic of KoreaDivision of Physics and Semiconductor Science, Dongguk University, Seoul 04620, Republic of KoreaDepartment of Chemistry, Faculty of Science, King Khalid University, Abha 61413, Saudi ArabiaDepartment of Chemistry, Faculty of Science, King Khalid University, Abha 61413, Saudi ArabiaDepartment of Advanced Battery Convergence Engineering, Dongguk University—Seoul, Seoul 04620, Republic of KoreaDepartment of Energy and Materials Engineering, Dongguk University—Seoul, Seoul 04620, Republic of KoreaWhile formamidinium lead iodide (FAPbI<sub>3</sub>) halide perovskite (HP) exhibits improved thermal stability and a wide band gap, its practical applicability is chained due to its room temperature phase transition from pure black (α-phase) to a non-perovskite yellow (δ-phase) when exposed to humidity. This phase transition is due to the fragile ionic bonding between the cationic and anionic parts of HPs during their formation. Herein, we report the synthesis of water-stable, red-light-emitting α-phase FAPbI<sub>3</sub> nanocrystals (NCs) using five different amines to overcome these intrinsic phase instabilities. The structural, morphological, and electronic characterization were obtained using X-ray diffraction (XRD), field emission scanning electron microscope (FESEM), and X-ray photoelectron spectroscopy (XPS), respectively. The photoluminescence (PL) emission and single-particle imaging bear the signature of dual emission in several amines, indicating a self-trapped excited state. Our simple strategy to stabilize the α-phase using various amine interfacial interactions could provide a better understanding and pave the way for a novel approach for the stabilization of perovskites for prolonged durations and their multifunctional applications.https://www.mdpi.com/2079-4991/13/23/3049halide perovskitestabilitysingle particle imagingphase transitionswater-stable |
| spellingShingle | Aditya Narayan Singh Atanu Jana Manickam Selvaraj Mohammed A. Assiri Sua Yun Kyung-Wan Nam Achieving Order in Disorder: Stabilizing Red Light-Emitting α-Phase Formamidinium Lead Iodide Nanomaterials halide perovskite stability single particle imaging phase transitions water-stable |
| title | Achieving Order in Disorder: Stabilizing Red Light-Emitting α-Phase Formamidinium Lead Iodide |
| title_full | Achieving Order in Disorder: Stabilizing Red Light-Emitting α-Phase Formamidinium Lead Iodide |
| title_fullStr | Achieving Order in Disorder: Stabilizing Red Light-Emitting α-Phase Formamidinium Lead Iodide |
| title_full_unstemmed | Achieving Order in Disorder: Stabilizing Red Light-Emitting α-Phase Formamidinium Lead Iodide |
| title_short | Achieving Order in Disorder: Stabilizing Red Light-Emitting α-Phase Formamidinium Lead Iodide |
| title_sort | achieving order in disorder stabilizing red light emitting α phase formamidinium lead iodide |
| topic | halide perovskite stability single particle imaging phase transitions water-stable |
| url | https://www.mdpi.com/2079-4991/13/23/3049 |
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