TY - JOUR
T1 - Chemically tuned, bi-functional polar interlayer for TiO2 photoanodes in fibre-shaped dye-sensitized solar cells
AU - Ardhi, Ryanda Enggar Anugrah
AU - Tran, Minh Xuan
AU - Wang, Manxiang
AU - Liu, Guicheng
AU - Lee, Joong Kee
N1 - Funding Information:
This work was supported by research grant (NRF-2019R1A2B5B03001772) and Brain Pool program (NRF-2019H1D3A2A02100593) funded by the National Research Foundation under the Ministry of Science and ICT, Republic of Korea. This work is also supported by the Korea Institutional Program (2E29592). The authors thank Mr Joo Man Woo for technical discussions during the preparation for this study. The authors would also like to thank Mr Byung Su Kim (Hanyang University), Ms. Ji-Yeong Kim (KIST), and Mr Evandi Rahman (KIST) for IMPS/IMVS, EQE, and UV-vis measurements, respectively.
Publisher Copyright:
© 2020 The Royal Society of Chemistry.
PY - 2020
Y1 - 2020
N2 - A novel strategy to improve the performance of fibre-shaped dye-sensitized solar cells (FDSSCs) has been successfully implemented using a polar polymer interlayer made of poly(2-ethyl-2-oxazoline) (PEOx). The inclusion of the PEOx interlayer reduces the typical defect sites and interband trap sites that exist on the TiO2-nanotube-based photoanode of the FDSSC. A local built-in electric field, induced by the interfacial intrinsic polarity of the PEOx interlayer, promotes facile photogenerated charge injection/extraction kinetics at the TiO2/dye interface. The negative polarity present on the bottom part of the PEOx chain exhibits an electronic doping-like behaviour, passivating the TiO2 defect sites and reducing trap-assisted recombination, while the positive polarity present on the top part of the PEOx chain provides dye-rich anchoring sites to improve the N719 dye adsorption loading on the TiO2 surface. The charge collection efficiency, short-circuit current density, open-circuit voltage, and fill factor of FDSSCs with the novel TiO2@PEOx photoanodes are superior than those of FDSSCs with traditional TiO2 photoanodes, by approximately 16.94%, 8.57%, 14.08%, and 6.58%, respectively. Consequently, the power conversion efficiency (PCE) of the proposed FDSSC is considerably improved, reaching 11.22%. Thus, the PCE of the proposed FDSSC is improved by approximately 32.16% compared with that of the traditional FDSSC.
AB - A novel strategy to improve the performance of fibre-shaped dye-sensitized solar cells (FDSSCs) has been successfully implemented using a polar polymer interlayer made of poly(2-ethyl-2-oxazoline) (PEOx). The inclusion of the PEOx interlayer reduces the typical defect sites and interband trap sites that exist on the TiO2-nanotube-based photoanode of the FDSSC. A local built-in electric field, induced by the interfacial intrinsic polarity of the PEOx interlayer, promotes facile photogenerated charge injection/extraction kinetics at the TiO2/dye interface. The negative polarity present on the bottom part of the PEOx chain exhibits an electronic doping-like behaviour, passivating the TiO2 defect sites and reducing trap-assisted recombination, while the positive polarity present on the top part of the PEOx chain provides dye-rich anchoring sites to improve the N719 dye adsorption loading on the TiO2 surface. The charge collection efficiency, short-circuit current density, open-circuit voltage, and fill factor of FDSSCs with the novel TiO2@PEOx photoanodes are superior than those of FDSSCs with traditional TiO2 photoanodes, by approximately 16.94%, 8.57%, 14.08%, and 6.58%, respectively. Consequently, the power conversion efficiency (PCE) of the proposed FDSSC is considerably improved, reaching 11.22%. Thus, the PCE of the proposed FDSSC is improved by approximately 32.16% compared with that of the traditional FDSSC.
UR - http://www.scopus.com/inward/record.url?scp=85079245221&partnerID=8YFLogxK
U2 - 10.1039/c9ta12118h
DO - 10.1039/c9ta12118h
M3 - Article
AN - SCOPUS:85079245221
SN - 2050-7488
VL - 8
SP - 2549
EP - 2562
JO - JOURNAL OF MATERIALS CHEMISTRY A
JF - JOURNAL OF MATERIALS CHEMISTRY A
IS - 5
ER -
