We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
D-A-A-Type Organic Dyes for NiO-Based Dye-Sensitized Solar Cells.
- Authors
Wu, Fei; Liu, Jianlin; Li, Xi; Song, Qunliang; Wang, Min; Zhong, Cheng; Zhu, Linna
- Abstract
Three new D-A-A-type organic sensitizers - W1, W2, and W3 - have been synthesized and applied for p-type dye-sensitized solar cells. For the first time, the electron-withdrawing 2,1,3-benzothiadiazole (BT) unit has been applied as the π-bridge between the triphenylamine donor and different acceptors in these dye molecules. It turns out that these dyes all exhibit power conversion efficiencies exceeding 0.1 %, and that the best performance is achieved by the dye W2, with an octyl 2-cyanoacrylate acceptor. It shows a power conversion efficiency of 0.166 %, with a short circuit current of 4.16 mA cm-2 and an open circuit voltage of 0.121 V. The higher light-harvesting efficiency leads to a higher photocurrent in W2. In addition, electrochemical impedance spectroscopy (EIS) studies suggest slower charge recombination at the metal oxide/electrolyte interface and a faster hole-transporting ability of W2. The factors together may account for the higher power conversion efficiency of W2. This work demonstrates rational design of these dye molecules for the construction of efficient p-type sensitizers.
- Subjects
SOLAR cells; DYE-sensitized solar cells; ENERGY conversion; PHOTOCHEMICAL research; NICKEL oxide; DENSITY functionals
- Publication
European Journal of Organic Chemistry, 2015, Vol 2015, Issue 31, p6850
- ISSN
1434-193X
- Publication type
Article
- DOI
10.1002/ejoc.201501036