Solution-Processed Nanostructured Hybrid Materials Based on Graphene Oxide Flakes Decorated with Ligand-Exchanged PbS QDs: Synthesis, Characterization and Optoelectronic Properties
Nanostructured hybrid materials based on the combination of semiconductor QDs and GO are promising candidates for different optoelectronic and catalytic applications and being able to produce such hybrid materials in solution will expand their possible range of applications. In the current work, cap...
Saved in:
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2025-04-01
|
| Series: | Applied Nano |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2673-3501/6/2/7 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1849418251156586496 |
|---|---|
| author | Giovanny Perez-Parra Nayely Torres-Gomez Vineetha Vinayakumar Diana F. Garcia-Gutierrez Selene Sepulveda-Guzman Domingo I. Garcia-Gutierrez |
| author_facet | Giovanny Perez-Parra Nayely Torres-Gomez Vineetha Vinayakumar Diana F. Garcia-Gutierrez Selene Sepulveda-Guzman Domingo I. Garcia-Gutierrez |
| author_sort | Giovanny Perez-Parra |
| collection | DOAJ |
| description | Nanostructured hybrid materials based on the combination of semiconductor QDs and GO are promising candidates for different optoelectronic and catalytic applications and being able to produce such hybrid materials in solution will expand their possible range of applications. In the current work, capping ligand-exchange procedures have been developed to replace the lead oleate normally found on the surface of PbS QDs synthesized by the popular hot-injection method. After the capping ligand-exchange process, the QDs are water soluble, which makes them soluble in most GO solutions. Solution-processed nanostructured hybrid materials based on GO flakes decorated with ligand-exchanged (EDT, TBAI and L-Cysteine) PbS QDs were synthesized by combining PbS QDs and GO solutions. Afterward, the resulting hybrid materials were thoroughly characterized by means of FTIR, XPS, Raman, UV-Vis-NIR and photoluminescence spectroscopy, as well as SEM and TEM techniques. The results indicate a clear surface chemistry variation in the capping ligand-exchanged PbS QDs, showing the presence of the exchanged ligand molecules. Thin films from the solution-processed nanostructured hybrid materials were deposited by the spin coating technique, and their optoelectronic properties were studied. Depending on the capping ligand molecule, the photoresponse and resistance of the thin films varied; the sample with the EDT ligand exchange showed the highest photoresponse and the lowest resistance. This surface chemistry had a direct effect on the charge carrier transfer and transport behavior of the nanostructured hybrid materials synthesized. These results show a novel and accessible route for synthesizing solution-processed and affordable nanostructured hybrid materials based on semiconductor QDs and GO. Additionally, the importance of the surface chemistry displayed by the PbS QDs and GO was clearly seen in determining the final optoelectronic properties displayed by their hybrid materials. |
| format | Article |
| id | doaj-art-27c8a85c32324fc4af5c91fc64b58808 |
| institution | Kabale University |
| issn | 2673-3501 |
| language | English |
| publishDate | 2025-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Nano |
| spelling | doaj-art-27c8a85c32324fc4af5c91fc64b588082025-08-20T03:32:28ZengMDPI AGApplied Nano2673-35012025-04-0162710.3390/applnano6020007Solution-Processed Nanostructured Hybrid Materials Based on Graphene Oxide Flakes Decorated with Ligand-Exchanged PbS QDs: Synthesis, Characterization and Optoelectronic PropertiesGiovanny Perez-Parra0Nayely Torres-Gomez1Vineetha Vinayakumar2Diana F. Garcia-Gutierrez3Selene Sepulveda-Guzman4Domingo I. Garcia-Gutierrez5Facultad de Ingeniería Mecánica y Eléctrica, FIME, Universidad Autónoma de Nuevo León, UANL, Av. Universidad S/N, Cd. Universitaria, San Nicolás de los Garza C.P. 66450, Nuevo León, MexicoInstituto Tecnológico de Toluca, Colonia Agrícola Bellavista, Tecnológico Nacional de México, Metepec 52149, Estado de Mexico, MexicoInstitute for Energy and Materials Processes–Particle Science and Technology (EMPI–PST), University of Duisburg-Essen, 47057 Duisburg, GermanyFacultad de Ingeniería Mecánica y Eléctrica, FIME, Universidad Autónoma de Nuevo León, UANL, Av. Universidad S/N, Cd. Universitaria, San Nicolás de los Garza C.P. 66450, Nuevo León, MexicoFacultad de Ingeniería Mecánica y Eléctrica, FIME, Universidad Autónoma de Nuevo León, UANL, Av. Universidad S/N, Cd. Universitaria, San Nicolás de los Garza C.P. 66450, Nuevo León, MexicoFacultad de Ingeniería Mecánica y Eléctrica, FIME, Universidad Autónoma de Nuevo León, UANL, Av. Universidad S/N, Cd. Universitaria, San Nicolás de los Garza C.P. 66450, Nuevo León, MexicoNanostructured hybrid materials based on the combination of semiconductor QDs and GO are promising candidates for different optoelectronic and catalytic applications and being able to produce such hybrid materials in solution will expand their possible range of applications. In the current work, capping ligand-exchange procedures have been developed to replace the lead oleate normally found on the surface of PbS QDs synthesized by the popular hot-injection method. After the capping ligand-exchange process, the QDs are water soluble, which makes them soluble in most GO solutions. Solution-processed nanostructured hybrid materials based on GO flakes decorated with ligand-exchanged (EDT, TBAI and L-Cysteine) PbS QDs were synthesized by combining PbS QDs and GO solutions. Afterward, the resulting hybrid materials were thoroughly characterized by means of FTIR, XPS, Raman, UV-Vis-NIR and photoluminescence spectroscopy, as well as SEM and TEM techniques. The results indicate a clear surface chemistry variation in the capping ligand-exchanged PbS QDs, showing the presence of the exchanged ligand molecules. Thin films from the solution-processed nanostructured hybrid materials were deposited by the spin coating technique, and their optoelectronic properties were studied. Depending on the capping ligand molecule, the photoresponse and resistance of the thin films varied; the sample with the EDT ligand exchange showed the highest photoresponse and the lowest resistance. This surface chemistry had a direct effect on the charge carrier transfer and transport behavior of the nanostructured hybrid materials synthesized. These results show a novel and accessible route for synthesizing solution-processed and affordable nanostructured hybrid materials based on semiconductor QDs and GO. Additionally, the importance of the surface chemistry displayed by the PbS QDs and GO was clearly seen in determining the final optoelectronic properties displayed by their hybrid materials.https://www.mdpi.com/2673-3501/6/2/7hybrid materialsPbS QDsGOoptoelectronic properties |
| spellingShingle | Giovanny Perez-Parra Nayely Torres-Gomez Vineetha Vinayakumar Diana F. Garcia-Gutierrez Selene Sepulveda-Guzman Domingo I. Garcia-Gutierrez Solution-Processed Nanostructured Hybrid Materials Based on Graphene Oxide Flakes Decorated with Ligand-Exchanged PbS QDs: Synthesis, Characterization and Optoelectronic Properties Applied Nano hybrid materials PbS QDs GO optoelectronic properties |
| title | Solution-Processed Nanostructured Hybrid Materials Based on Graphene Oxide Flakes Decorated with Ligand-Exchanged PbS QDs: Synthesis, Characterization and Optoelectronic Properties |
| title_full | Solution-Processed Nanostructured Hybrid Materials Based on Graphene Oxide Flakes Decorated with Ligand-Exchanged PbS QDs: Synthesis, Characterization and Optoelectronic Properties |
| title_fullStr | Solution-Processed Nanostructured Hybrid Materials Based on Graphene Oxide Flakes Decorated with Ligand-Exchanged PbS QDs: Synthesis, Characterization and Optoelectronic Properties |
| title_full_unstemmed | Solution-Processed Nanostructured Hybrid Materials Based on Graphene Oxide Flakes Decorated with Ligand-Exchanged PbS QDs: Synthesis, Characterization and Optoelectronic Properties |
| title_short | Solution-Processed Nanostructured Hybrid Materials Based on Graphene Oxide Flakes Decorated with Ligand-Exchanged PbS QDs: Synthesis, Characterization and Optoelectronic Properties |
| title_sort | solution processed nanostructured hybrid materials based on graphene oxide flakes decorated with ligand exchanged pbs qds synthesis characterization and optoelectronic properties |
| topic | hybrid materials PbS QDs GO optoelectronic properties |
| url | https://www.mdpi.com/2673-3501/6/2/7 |
| work_keys_str_mv | AT giovannyperezparra solutionprocessednanostructuredhybridmaterialsbasedongrapheneoxideflakesdecoratedwithligandexchangedpbsqdssynthesischaracterizationandoptoelectronicproperties AT nayelytorresgomez solutionprocessednanostructuredhybridmaterialsbasedongrapheneoxideflakesdecoratedwithligandexchangedpbsqdssynthesischaracterizationandoptoelectronicproperties AT vineethavinayakumar solutionprocessednanostructuredhybridmaterialsbasedongrapheneoxideflakesdecoratedwithligandexchangedpbsqdssynthesischaracterizationandoptoelectronicproperties AT dianafgarciagutierrez solutionprocessednanostructuredhybridmaterialsbasedongrapheneoxideflakesdecoratedwithligandexchangedpbsqdssynthesischaracterizationandoptoelectronicproperties AT selenesepulvedaguzman solutionprocessednanostructuredhybridmaterialsbasedongrapheneoxideflakesdecoratedwithligandexchangedpbsqdssynthesischaracterizationandoptoelectronicproperties AT domingoigarciagutierrez solutionprocessednanostructuredhybridmaterialsbasedongrapheneoxideflakesdecoratedwithligandexchangedpbsqdssynthesischaracterizationandoptoelectronicproperties |