Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV16)
Publication date: 28th March 2016
Charge transfer limitation with polysulfide electrolyte at polymer counter electrode (CE) is one of the significant issues hindering the enhancement of energy conversion efficiency (ECE) in quantum dot sensitized solar cells (QDSCs). Herein, 1,2-ethandithiol (EDT) was doped on nano-fibrous poly(3,4-ethylenedioxythiophene) (PEDOT NF) to overcome the charge transfer limitation between polymer CE and polysulfide redox mediator. EDT helps not only increased the crystallinity of PEDOT NF by physical doping, but also changed the molecular conformation from benzoid to quinoid structure through the chemical doping, which were characterized by wide-angle X -ray scattering, Raman spectroscopy and X -ray photoelectron spectroscopy. Therefore, EDT-doped PEDOT NF CE showed almost 1.5 times higher conductivity than the bare one. Furthermore, the compatibility between polysulfide and PEDOT NF was also improved to a large extent. As a result, the charge transfer resistance between the polymer CE and polysulfide electrolyte was reduced. Such multiple effects result in over 3% ECE, which are almost twice, compared to CE based on bare PEDOT NF (1.64%).
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International Conference on Hybrid and Organic Photovoltaics
International Conference on Hybrid and Organic Photovoltaics (HOPV) is celebrated yearly in May. The main topics are the development, function and modeling of materials and devices for hybrid and organic solar cells. The field is now dominated by perovskite solar cells but also other hybrid technologies, as organic solar cells, quantum dot solar cells, and dye-sensitized solar cells and their integration into devices for photoelectrochemical solar fuel production.
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