{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,10]],"date-time":"2026-01-10T03:47:15Z","timestamp":1768016835292,"version":"3.49.0"},"reference-count":64,"publisher":"MDPI AG","issue":"1","license":[{"start":{"date-parts":[[2024,12,26]],"date-time":"2024-12-26T00:00:00Z","timestamp":1735171200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Instituto Polit\u00e9cnico Nacional","award":["50520241486"],"award-info":[{"award-number":["50520241486"]}]},{"name":"Instituto Polit\u00e9cnico Nacional","award":["20241489"],"award-info":[{"award-number":["20241489"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Materials"],"abstract":"<jats:p>The synthesis of ethylamine-based perovskites has emerged to attempt to replace the lead in lead-based perovskites for the alkaline earth elements barium and strontium, introducing chloride halide to prepare the perovskites in solar cell technology. X-ray diffraction studies were conducted, and EXPO2014 software was utilized to resolve the structure. Chemical characterization was performed using Fourier transform infrared spectroscopy, photophysical properties were analyzed through ultraviolet\u2013visible spectroscopy, and photoluminescence properties were determined to confirm the perovskite characteristics. The software employed can determine new crystal structures, as follows: orthorhombic for barium perovskite CH3CH2NH3BaCl3 and tetragonal for strontium perovskite CH3CH2NH3SrCl3. The ultraviolet\u2013visible spectroscopy data demonstrated that a temperature increase (90\u2013110 \u00b0C) contributed to reducing the band gap from 3.93 eV to 3.67 eV for barium perovskite and from 4.05 eV to 3.84 eV for strontium perovskite. The results exhibited that new materials can be obtained through gentle chemistry and specialized software like EXPO2014, both of which are capable of conducting reciprocal and direct space analyses for identifying crystal structures using powder X-ray diffraction.<\/jats:p>","DOI":"10.3390\/ma18010058","type":"journal-article","created":{"date-parts":[[2024,12,26]],"date-time":"2024-12-26T21:13:18Z","timestamp":1735247598000},"page":"58","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Identifying Crystal Structure of Halides of Strontium and Barium Perovskite Compounds with EXPO2014 Software"],"prefix":"10.3390","volume":"18","author":[{"ORCID":"https:\/\/orcid.org\/0009-0001-3077-1717","authenticated-orcid":false,"given":"Jorge A.","family":"Perez Franco","sequence":"first","affiliation":[{"name":"Instituto Polit\u00e9cnico Nacional CIITEC, Azcapotzalco, Mexico City 02250, Mexico"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6711-2638","authenticated-orcid":false,"given":"Antonieta","family":"Garc\u00eda Murillo","sequence":"additional","affiliation":[{"name":"Instituto Polit\u00e9cnico Nacional CIITEC, Azcapotzalco, Mexico City 02250, Mexico"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7513-8472","authenticated-orcid":false,"given":"Felipe de J.","family":"Carrillo Romo","sequence":"additional","affiliation":[{"name":"Instituto Polit\u00e9cnico Nacional CIITEC, Azcapotzalco, Mexico City 02250, Mexico"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1664-1414","authenticated-orcid":false,"given":"Issis C.","family":"Romero Ibarra","sequence":"additional","affiliation":[{"name":"Instituto Polit\u00e9cnico Nacional-UPIITA, Mexico City 02580, Mexico"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Arturo","family":"Cervantes Tob\u00f3n","sequence":"additional","affiliation":[{"name":"Instituto Polit\u00e9cnico Nacional ESIQIE, Mexico City 07700, Mexico"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2024,12,26]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"65","DOI":"10.1016\/j.mattod.2014.07.007","article-title":"Perovskite solar cells: An emerging photovoltaic technology","volume":"18","author":"Park","year":"2015","journal-title":"Mater. 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