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Dye-sensitized solar cells using deep eutectic solvents mixed with ethanol as an effective electrolyte medium

This research aims to develop a new type of electrolyte for dye-sensitized solar cells (DSCs) which can be produced in cost-effective and large scale. DSCs using deep eutectic solvents (DESs) mixed with ethanol (50% w/w DES content), as an electrolyte medium, was studied herein for the first time. | Science and Technology Development Journal Vol 21, Issue 01, June 2018 Viet Nam National University Ho Chi Minh City, Viet Nam Science and Technology Development Journal ISSN: 1859-0128 Volume 21: Issue 01 June 2018 Journal homepage: http://stdj.scienceandtechnology.com.vn Dye-sensitized solar cells using deep eutectic solvents mixed with ethanol as an effective electrolyte medium Thuy-Duy Thi Nguyen, Phuong Tuyet Nguyen, Phuong Hoang Tran* Faculty of Chemistry, VNUHCM University of Science, Viet Nam ARTICLE DETAILS History Received: 12 April 2018 Accepted: 18 May 2018 Published: 07 June 2018 Keywords Deep eutectic solvents, Dye-sensitized solar cells, Electrolyte, Green solvents ABSTRACT This research aims to develop a new type of electrolyte for dye-sensitized solar cells (DSCs) which can be produced in cost-effective and large scale. DSCs using deep eutectic solvents (DESs) mixed with ethanol (50% w/w DES content), as an electrolyte medium, was studied herein for the first time. Ten types of DESs were synthesized and three among them were potential candidates for DSC electrolytes. Compared to toxic and volatile organic solvents, this mixed solvent is more eco-friendly and inexpensive. According to J-V curve measurements, DSCs that used DES-ethanol medium showed promising photovoltaic performance. © 2018 Viet Nam National University Ho Chi Minh City, Viet Nam under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 1. Introduction Dye-sensitized solar cells (DSCs) have attracted widespread scientific and technological attentions as ´ a high efficiency and low-cost alternative to conventional inorganic photovoltaic devices ORegan and Gr¨atzel (1991); Papageorgiou (1996); Hagfeldt et al. (2010). From the first time of invention by O’Regan ´ and Gr¨atzel in 1991, DSCs have undergone a developmental process in terms of practical applications ORegan and Gr¨atzel (1991). A typical DSC includes three parts of mesoporous titanium dioxide (TiO2) film, .