Synthesis of Cobalt-Doped TiO2 Based on Metal-Organic Frameworks as an Effective Electron Transport Material in Perovskite Solar Cells
- Authors
- Thi My Huyen Nguyen; Bark, Chung Wung
- Issue Date
- Feb-2020
- Publisher
- AMER CHEMICAL SOC
- Citation
- ACS OMEGA, v.5, no.5, pp.2280 - 2286
- Journal Title
- ACS OMEGA
- Volume
- 5
- Number
- 5
- Start Page
- 2280
- End Page
- 2286
- URI
- https://scholarworks.bwise.kr/gachon/handle/2020.sw.gachon/26116
- DOI
- 10.1021/acsomega.9b03507
- ISSN
- 2470-1343
- Abstract
- In this study, Co-doped TiO2 was prepared successfully using a solvothermal method with trimesic acid (H3BTC) 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 TiO2 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 (lambda = 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 TiO2 as an electron transport layer was found to be 15.75%, while that of solar cells using commercial dyesol TiO2 is only 14.42%.
- Files in This Item
- There are no files associated with this item.
- Appears in
Collections - IT융합대학 > 전기공학과 > 1. Journal Articles
![qrcode](https://api.qrserver.com/v1/create-qr-code/?size=55x55&data=https://scholarworks.bwise.kr/gachon/handle/2020.sw.gachon/26116)
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.