Lead-Free Europium Halide Perovskite Nanoplatelets
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| Main Authors: | , , , , , , , , , , , |
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| Format: | Preprint |
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2025
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| author | Fernández, Sebastian Mbachu, Divine Hu, Manchen Cui, Han Michaels, William Narayanan, Pournima Colenbrander, Tyler K. Zhou, Qi Lin, Da Lecina, Ona Segura Hong, Guosong Congreve, Daniel N. |
| author_facet | Fernández, Sebastian Mbachu, Divine Hu, Manchen Cui, Han Michaels, William Narayanan, Pournima Colenbrander, Tyler K. Zhou, Qi Lin, Da Lecina, Ona Segura Hong, Guosong Congreve, Daniel N. |
| contents | Metal halide perovskites possess desirable optical, material, and electrical properties which have had substantial impact on next-generation optoelectronics. However, given the toxicity of lead, alternative lead-free perovskite semiconductors are needed. By fully replacing lead with rare-earth elements, one can simultaneously address toxicity concerns and achieve comparable optoelectronic performance. Here, we demonstrate the synthesis of two-dimensional europium halide perovskite nanoplatelets governed by the formula $\mathrm{L_{2}EuX_{4}}$ where L is an organic ligand and X is a halide anion. The structure, morphology, and composition of the nanoplatelets are confirmed by XRD, AFM, and XPS. Deep blue-emitting $\mathrm{PEA_{2}EuBr_{4}}$ perovskite nanoplatelets are synthesized in both the solution- and solid-states with photoluminescence emission centered at 446 nm and CIE color coordinates of (0.1515, 0.0327) and (0.1515, 0.0342), respectively. Additionally, near-ultraviolet $\mathrm{PEA_{2}EuCl_{4}}$ perovskite nanoplatelets are synthesized in both the solution- and solid-states with photoluminescence emission centered at 400 nm and 401 nm, respectively. Overall, europium halide perovskite nanoplatelets offer a lead-free alternative for deep blue, violet, and near-ultraviolet light emission $\unicode{x2013}$ charting new pathways for optoelectronics in this energy regime. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2511_10873 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Lead-Free Europium Halide Perovskite Nanoplatelets Fernández, Sebastian Mbachu, Divine Hu, Manchen Cui, Han Michaels, William Narayanan, Pournima Colenbrander, Tyler K. Zhou, Qi Lin, Da Lecina, Ona Segura Hong, Guosong Congreve, Daniel N. Materials Science Applied Physics Metal halide perovskites possess desirable optical, material, and electrical properties which have had substantial impact on next-generation optoelectronics. However, given the toxicity of lead, alternative lead-free perovskite semiconductors are needed. By fully replacing lead with rare-earth elements, one can simultaneously address toxicity concerns and achieve comparable optoelectronic performance. Here, we demonstrate the synthesis of two-dimensional europium halide perovskite nanoplatelets governed by the formula $\mathrm{L_{2}EuX_{4}}$ where L is an organic ligand and X is a halide anion. The structure, morphology, and composition of the nanoplatelets are confirmed by XRD, AFM, and XPS. Deep blue-emitting $\mathrm{PEA_{2}EuBr_{4}}$ perovskite nanoplatelets are synthesized in both the solution- and solid-states with photoluminescence emission centered at 446 nm and CIE color coordinates of (0.1515, 0.0327) and (0.1515, 0.0342), respectively. Additionally, near-ultraviolet $\mathrm{PEA_{2}EuCl_{4}}$ perovskite nanoplatelets are synthesized in both the solution- and solid-states with photoluminescence emission centered at 400 nm and 401 nm, respectively. Overall, europium halide perovskite nanoplatelets offer a lead-free alternative for deep blue, violet, and near-ultraviolet light emission $\unicode{x2013}$ charting new pathways for optoelectronics in this energy regime. |
| title | Lead-Free Europium Halide Perovskite Nanoplatelets |
| topic | Materials Science Applied Physics |
| url | https://arxiv.org/abs/2511.10873 |