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Synthesis of Cobalt-Doped TiO(2) Based on Metal–Organic Frameworks as an Effective Electron Transport Material in Perovskite Solar Cells

[Image: see text] In this study, Co-doped TiO(2) was prepared successfully using a solvothermal method with trimesic acid (H(3)BTC) as an organic framework to form the Co-doped Ti metal–organic framework (Co-doped Ti-MOF). By thermally decomposing the Co-doped Ti-MOF in air, the framework template w...

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Autores principales: Nguyen, Thi My Huyen, Bark, Chung Wung
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2020
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7016924/
https://www.ncbi.nlm.nih.gov/pubmed/32064389
http://dx.doi.org/10.1021/acsomega.9b03507
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author Nguyen, Thi My Huyen
Bark, Chung Wung
author_facet Nguyen, Thi My Huyen
Bark, Chung Wung
author_sort Nguyen, Thi My Huyen
collection PubMed
description [Image: see text] In this study, Co-doped TiO(2) was prepared successfully using a solvothermal method with trimesic acid (H(3)BTC) as an organic framework to form the Co-doped Ti metal–organic framework (Co-doped Ti-MOF). By thermally decomposing the Co-doped Ti-MOF in air, the framework template was removed, and porous Co-doped TiO(2) was obtained. The crystal structure of the material was analyzed using X-ray diffraction. The morphology was examined using scanning electron microscopy (SEM) and focused ion beam SEM. The large specific surface area was determined to be 135.95 m(2) g(–1) using Brunauer–Emmett–Teller theory. Fourier transform infrared spectroscopy verified the presence of Ti–O–Ti and Co–O vibrations in the as-prepared sample. Furthermore, the results of UV–vis spectroscopy showed that doping with Co remarkably improved the absorption ability of Ti-MOF toward the visible-light region with a band gap energy of 2.38 eV (λ = 502 nm). Steady-state photoluminescence and electrochemical impedance spectroscopy were conducted to illustrate the improvement of electron transfer in the doped material further. The optimum power conversion efficiency of solar cells using 1 wt % Co-doped TiO(2) as an electron transport layer was found to be 15.75%, while that of solar cells using commercial dyesol TiO(2) is only 14.42%.
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spelling pubmed-70169242020-02-14 Synthesis of Cobalt-Doped TiO(2) Based on Metal–Organic Frameworks as an Effective Electron Transport Material in Perovskite Solar Cells Nguyen, Thi My Huyen Bark, Chung Wung ACS Omega [Image: see text] In this study, Co-doped TiO(2) was prepared successfully using a solvothermal method with trimesic acid (H(3)BTC) as an organic framework to form the Co-doped Ti metal–organic framework (Co-doped Ti-MOF). By thermally decomposing the Co-doped Ti-MOF in air, the framework template was removed, and porous Co-doped TiO(2) was obtained. The crystal structure of the material was analyzed using X-ray diffraction. The morphology was examined using scanning electron microscopy (SEM) and focused ion beam SEM. The large specific surface area was determined to be 135.95 m(2) g(–1) using Brunauer–Emmett–Teller theory. Fourier transform infrared spectroscopy verified the presence of Ti–O–Ti and Co–O vibrations in the as-prepared sample. Furthermore, the results of UV–vis spectroscopy showed that doping with Co remarkably improved the absorption ability of Ti-MOF toward the visible-light region with a band gap energy of 2.38 eV (λ = 502 nm). Steady-state photoluminescence and electrochemical impedance spectroscopy were conducted to illustrate the improvement of electron transfer in the doped material further. The optimum power conversion efficiency of solar cells using 1 wt % Co-doped TiO(2) as an electron transport layer was found to be 15.75%, while that of solar cells using commercial dyesol TiO(2) is only 14.42%. American Chemical Society 2020-01-30 /pmc/articles/PMC7016924/ /pubmed/32064389 http://dx.doi.org/10.1021/acsomega.9b03507 Text en Copyright © 2020 American Chemical Society This is an open access article published under a Creative Commons Attribution (CC-BY) License (http://pubs.acs.org/page/policy/authorchoice_ccby_termsofuse.html) , which permits unrestricted use, distribution and reproduction in any medium, provided the author and source are cited.
spellingShingle Nguyen, Thi My Huyen
Bark, Chung Wung
Synthesis of Cobalt-Doped TiO(2) Based on Metal–Organic Frameworks as an Effective Electron Transport Material in Perovskite Solar Cells
title Synthesis of Cobalt-Doped TiO(2) Based on Metal–Organic Frameworks as an Effective Electron Transport Material in Perovskite Solar Cells
title_full Synthesis of Cobalt-Doped TiO(2) Based on Metal–Organic Frameworks as an Effective Electron Transport Material in Perovskite Solar Cells
title_fullStr Synthesis of Cobalt-Doped TiO(2) Based on Metal–Organic Frameworks as an Effective Electron Transport Material in Perovskite Solar Cells
title_full_unstemmed Synthesis of Cobalt-Doped TiO(2) Based on Metal–Organic Frameworks as an Effective Electron Transport Material in Perovskite Solar Cells
title_short Synthesis of Cobalt-Doped TiO(2) Based on Metal–Organic Frameworks as an Effective Electron Transport Material in Perovskite Solar Cells
title_sort synthesis of cobalt-doped tio(2) based on metal–organic frameworks as an effective electron transport material in perovskite solar cells
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7016924/
https://www.ncbi.nlm.nih.gov/pubmed/32064389
http://dx.doi.org/10.1021/acsomega.9b03507
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AT barkchungwung synthesisofcobaltdopedtio2basedonmetalorganicframeworksasaneffectiveelectrontransportmaterialinperovskitesolarcells