Passivation Mechanism in Highly Luminescent Nanocomposite‐Based CH3NH3PbBr3 Perovskite Nanocrystals
Water exposure significantly impacts the structure and photoluminescence (PL) of metal halide perovskites. However, humid conditions can enable the in situ synthesis of methylammonium lead bromide (MAPbBr3) perovskite nanocrystals (NCs) within a nickel acetate matrix, achieving PL quantum yields (PL...
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| Format: | Article |
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Wiley-VCH
2025-05-01
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| Series: | Small Science |
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| Online Access: | https://doi.org/10.1002/smsc.202400529 |
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| author | Jaume Noguera‐Gómez Víctor Sagra‐Rodríguez Vladimir S. Chirvony Miriam Minguez‐Avellan Mahesh Eledath‐Changarath Juan F. Sánchez‐Royo Juan P. Martínez‐Pastor Pablo P. Boix Rafael Abargues |
| author_facet | Jaume Noguera‐Gómez Víctor Sagra‐Rodríguez Vladimir S. Chirvony Miriam Minguez‐Avellan Mahesh Eledath‐Changarath Juan F. Sánchez‐Royo Juan P. Martínez‐Pastor Pablo P. Boix Rafael Abargues |
| author_sort | Jaume Noguera‐Gómez |
| collection | DOAJ |
| description | Water exposure significantly impacts the structure and photoluminescence (PL) of metal halide perovskites. However, humid conditions can enable the in situ synthesis of methylammonium lead bromide (MAPbBr3) perovskite nanocrystals (NCs) within a nickel acetate matrix, achieving PL quantum yields (PLQY) of up to 80%. The water‐driven formation and transformation of MAPbBr3 is presented, highlighting the crucial role of acetate. Comprehensive optical and structural analyses reveal that low relative humidity (RH < 20%) favors the formation of non‐emissive MA4PbBr6 (0D) and hydroxide species (PbBrOH, OH−) . Exposure to higher RH induces a structural reorganization from 0D MA4PbBr6 to 3D MAPbBr3 via a MABr‐stripping mechanism, forming NCs with enhanced PLQY. Removing ambient humidity quenches PL, a process that is reversible due to hydroxide‐mediated reactions controlled by dual acid‐base nature of the acetic acid/acetate system. Unlike previous reports, the findings reveal that hydroxide ions reversibly bind to NCs, passivating traps and improving stability. Acetate's basicity plays a critical role in generating OH−, promoting the passivation, stability, and enhanced optical properties of the perovskite nanocomposites. |
| format | Article |
| id | doaj-art-99c646a2f58a4dab940f4a05ab7edd4c |
| institution | OA Journals |
| issn | 2688-4046 |
| language | English |
| publishDate | 2025-05-01 |
| publisher | Wiley-VCH |
| record_format | Article |
| series | Small Science |
| spelling | doaj-art-99c646a2f58a4dab940f4a05ab7edd4c2025-08-20T01:47:33ZengWiley-VCHSmall Science2688-40462025-05-0155n/an/a10.1002/smsc.202400529Passivation Mechanism in Highly Luminescent Nanocomposite‐Based CH3NH3PbBr3 Perovskite NanocrystalsJaume Noguera‐Gómez0Víctor Sagra‐Rodríguez1Vladimir S. Chirvony2Miriam Minguez‐Avellan3Mahesh Eledath‐Changarath4Juan F. Sánchez‐Royo5Juan P. Martínez‐Pastor6Pablo P. Boix7Rafael Abargues8Instituto de Ciencia de los Materiales de la Universidad de Valencia (ICMUV) 46980 Paterna València SpainInstituto de Ciencia de los Materiales de la Universidad de Valencia (ICMUV) 46980 Paterna València SpainInstituto de Ciencia de los Materiales de la Universidad de Valencia (ICMUV) 46980 Paterna València SpainInstituto de Ciencia de los Materiales de la Universidad de Valencia (ICMUV) 46980 Paterna València SpainInstituto de Ciencia de los Materiales de la Universidad de Valencia (ICMUV) 46980 Paterna València SpainInstituto de Ciencia de los Materiales de la Universidad de Valencia (ICMUV) 46980 Paterna València SpainInstituto de Ciencia de los Materiales de la Universidad de Valencia (ICMUV) 46980 Paterna València SpainInstituto de Tecnología Química Universitat Politècnica València‐Consejo Superior de Investigaciones Científicas Av. dels Tarongers 46022 València SpainInstituto de Ciencia de los Materiales de la Universidad de Valencia (ICMUV) 46980 Paterna València SpainWater exposure significantly impacts the structure and photoluminescence (PL) of metal halide perovskites. However, humid conditions can enable the in situ synthesis of methylammonium lead bromide (MAPbBr3) perovskite nanocrystals (NCs) within a nickel acetate matrix, achieving PL quantum yields (PLQY) of up to 80%. The water‐driven formation and transformation of MAPbBr3 is presented, highlighting the crucial role of acetate. Comprehensive optical and structural analyses reveal that low relative humidity (RH < 20%) favors the formation of non‐emissive MA4PbBr6 (0D) and hydroxide species (PbBrOH, OH−) . Exposure to higher RH induces a structural reorganization from 0D MA4PbBr6 to 3D MAPbBr3 via a MABr‐stripping mechanism, forming NCs with enhanced PLQY. Removing ambient humidity quenches PL, a process that is reversible due to hydroxide‐mediated reactions controlled by dual acid‐base nature of the acetic acid/acetate system. Unlike previous reports, the findings reveal that hydroxide ions reversibly bind to NCs, passivating traps and improving stability. Acetate's basicity plays a critical role in generating OH−, promoting the passivation, stability, and enhanced optical properties of the perovskite nanocomposites.https://doi.org/10.1002/smsc.202400529emissionnanocompositenanocrystalsperovskite |
| spellingShingle | Jaume Noguera‐Gómez Víctor Sagra‐Rodríguez Vladimir S. Chirvony Miriam Minguez‐Avellan Mahesh Eledath‐Changarath Juan F. Sánchez‐Royo Juan P. Martínez‐Pastor Pablo P. Boix Rafael Abargues Passivation Mechanism in Highly Luminescent Nanocomposite‐Based CH3NH3PbBr3 Perovskite Nanocrystals Small Science emission nanocomposite nanocrystals perovskite |
| title | Passivation Mechanism in Highly Luminescent Nanocomposite‐Based CH3NH3PbBr3 Perovskite Nanocrystals |
| title_full | Passivation Mechanism in Highly Luminescent Nanocomposite‐Based CH3NH3PbBr3 Perovskite Nanocrystals |
| title_fullStr | Passivation Mechanism in Highly Luminescent Nanocomposite‐Based CH3NH3PbBr3 Perovskite Nanocrystals |
| title_full_unstemmed | Passivation Mechanism in Highly Luminescent Nanocomposite‐Based CH3NH3PbBr3 Perovskite Nanocrystals |
| title_short | Passivation Mechanism in Highly Luminescent Nanocomposite‐Based CH3NH3PbBr3 Perovskite Nanocrystals |
| title_sort | passivation mechanism in highly luminescent nanocomposite based ch3nh3pbbr3 perovskite nanocrystals |
| topic | emission nanocomposite nanocrystals perovskite |
| url | https://doi.org/10.1002/smsc.202400529 |
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