<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>1665-1456</journal-id>
<journal-title><![CDATA[Biotecnia]]></journal-title>
<abbrev-journal-title><![CDATA[Biotecnia]]></abbrev-journal-title>
<issn>1665-1456</issn>
<publisher>
<publisher-name><![CDATA[Universidad de Sonora, División de Ciencias Biológicas y de la Salud]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1665-14562024000100164</article-id>
<article-id pub-id-type="doi">10.18633/biotecnia.v26.2441</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Síntesis y caracterización películas poliméricas compuestas de PbI2 / PVA para su posible aplicación en dispositivos optoelectrónicos]]></article-title>
<article-title xml:lang="en"><![CDATA[Synthesis and characterization of PbI2/PVA composite polymer films for possible application in optoelectronic devices]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Maca-Ossa]]></surname>
<given-names><![CDATA[Bryan]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Solís-Mosquera]]></surname>
<given-names><![CDATA[Jeisson Javier]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cabrera-Germán]]></surname>
<given-names><![CDATA[Dagoberto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Suárez-Campos]]></surname>
<given-names><![CDATA[Guillermo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Sotelo-Lerma]]></surname>
<given-names><![CDATA[Mérida]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de Sonora Departamento de Investigación en Polímeros y Materiales ]]></institution>
<addr-line><![CDATA[Hermosillo Sonora]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad de Sonora Departamento de Investigación en Física ]]></institution>
<addr-line><![CDATA[Hermosillo Sonora]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2024</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2024</year>
</pub-date>
<volume>26</volume>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1665-14562024000100164&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1665-14562024000100164&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1665-14562024000100164&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Se sintetizaron películas compuestas de alcohol polivinílico/yoduro de plomo (PVA/PbI2) con diferentes concentraciones de PbI2 utilizando un proceso de evaporación de solventes a baja temperatura y de bajo costo. Las propiedades estructurales de las partículas obtenidas fueron analizadas mediante difracción de rayos X (DRX) y microscopía electrónica de barrido (MEB). Los resultados de DRX mostraron una naturaleza predominantemente cristalina, exhibiendo los planos de reflexión característicos del politipo 2H del yoduro de plomo. Las micrografías MEB mostraron una morfología hexagonal con un tamaño promedio de partícula de 13.2 µm. Los parámetros ópticos de las películas compuestas se midieron mediante espectroscopía UV-Vis, encontrándose que la brecha de energía indirecta para el PVA puro es de 4.65 eV. En contraste, las películas de PVA/PbI2 con concentraciones de 0.5, 1.0, 1.5 y 2.0 % en peso de PbI2 mostró una transición directa de 5.16 eV y una transición indirecta de 4.45 eV. La resistencia eléctrica de la película de PVA se midió en 4.32 × 107 &#937;. Los análisis químicos mediante espectroscopía infrarroja por transformada de Fourier (FTIR) indicaron que la adición de partículas de PbI2 no modifica las bandas características del PVA, lo que sugiere la ausencia de enlaces químicos entre las partículas y la matriz polimérica. Las propiedades ópticas y eléctricas obtenidas sugieren que las películas compuestas de PVA/PbI2 tienen potencial para aplicaciones en el campo de la optoelectrónica.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Polyvinyl alcohol/lead iodide (PVA/PbI2) composite films were synthesized with varying PbI2 concentrations using a low-temperature, cost-effective solvent evaporation process. The structural properties of the synthesized particles were analyzed using X-ray diffraction (XRD) and scanning electron microscopy (SEM). XRD results revealed a predominantly crystalline nature, displaying reflection planes characteristic of the 2H polytype of lead iodide. SEM micrographs showed a hexagonal morphology with an average particle size of 13.2 µm. The optical properties of the composite films were measured using UV-Vis spectroscopy, indicating that the indirect energy band gap for pure PVA is 4.65 eV. In contrast, PVA/PbI2 films with 0.5, 1.0, 1.5, and 2.0 wt% PbI2 exhibited a direct transition of 5.16 eV and an indirect transition of 4.45 eV. The electrical resistance of the PVA film was measured at 4.318 × 107 &#937;. Chemical analysis using Fourier-transform infrared (FTIR) spectroscopy showed that the addition of PbI2 particles did not alter the characteristic bands of PVA, suggesting no chemical bonding between the particles and the polymer matrix. The optical and electrical properties suggest that the PVA/PbI2 composite films are promising for various optoelectronic applications.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Yoduro de Plomo]]></kwd>
<kwd lng="es"><![CDATA[películas compuestas]]></kwd>
<kwd lng="es"><![CDATA[Precipitación química]]></kwd>
<kwd lng="es"><![CDATA[Alcohol polivinílico]]></kwd>
<kwd lng="es"><![CDATA[optoelectrónico]]></kwd>
<kwd lng="en"><![CDATA[Lead iodide]]></kwd>
<kwd lng="en"><![CDATA[composite films]]></kwd>
<kwd lng="en"><![CDATA[chemical precipitation]]></kwd>
<kwd lng="en"><![CDATA[polyvinyl alcohol]]></kwd>
<kwd lng="en"><![CDATA[optoelectronic]]></kwd>
</kwd-group>
</article-meta>
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