Triumphing over Charge Transfer Limitations of PEDOT Nanofiber Reduction Catalyst by 1,2-Ethanedithiol Doping for Quantum Dot Solar Cells
- Title
- Triumphing over Charge Transfer Limitations of PEDOT Nanofiber Reduction Catalyst by 1,2-Ethanedithiol Doping for Quantum Dot Solar Cells
- Author
- 강용수
- Keywords
- PEDOT; doping; metal-free reduction catalyst; quantum dot solar cells; charge transfer limitation; flexible device
- Issue Date
- 2017-01
- Publisher
- AMER CHEMICAL SOC
- Citation
- ACS APPLIED MATERIALS & INTERFACES, v. 9, no. 2, page. 1877-1884
- Abstract
- Charge transfer between a conducting polymer-based counter electrode (CE) and a polysulfide (S2-/S-n(2-)) electrolyte mediator is a key limitation to improvements of solar energy conversion efficiency (ECE) in quantum-dot-sensitized solar cells (QDSCs). In this paper, 1,2-ethanedithiol (EDT) was doped into nanofibrous poly(3,4-ethylenedioxythiophene) (PEDOT NF) to overcome the charge transfer limitation between PEDOT NF and S2-/S-n(2-). EDT not only helps to reduce the aggregation and thus enhance the linearization of the PEDOT chains but also changes the molecular conformation of the PEDOT chains from a benzoid to a quinoid structure. EDT-doped PEDOT NF-based CEs showed almost 3.7 times higher conductivity, better electrocatalytic activity, and improved compatibility with S2-/S-n(2-) in an aqueous electrolyte. As a result, the charge transfer resistance between the polymer-based CE and the S2-/S-n(2-) electrolyte was significantly reduced, resulting in over 3% ECE in QDSCs, more than double that of a bare PEDOT NF-based CE.
- URI
- https://pubs.acs.org/doi/10.1021/acsami.6b12536https://repository.hanyang.ac.kr/handle/20.500.11754/112286
- ISSN
- 1944-8244; 1944-8252
- DOI
- 10.1021/acsami.6b12536
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > ENERGY ENGINEERING(에너지공학과) > Articles
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