TY - JOUR
T1 - An electrochromic device based on Prussian blue, self-immobilized vinyl benzyl viologen, and ferrocene
AU - Lu, Hsin Che
AU - Kao, Sheng Yuan
AU - Chang, Ting Hsiang
AU - Kung, Chung Wei
AU - Ho, Kuo Chuan
N1 - Funding Information:
The authors would like to appreciate the Ministry of Science and Technology (MOST) (Grant number: 104-2221-E-002 -127 -MY2) of Taiwan for the financial support for this research.
PY - 2016/4/1
Y1 - 2016/4/1
N2 - In this study, the electrochromic property of vinyl benzyl viologen (VBV) was first investigated and incorporated in an electrochromic device (ECD). The polymerizable vinyl moiety of VBV enables a self-immobilization through UV-curing under potential bias. Immobilized VBV (I-VBV) was obtained on the electrode and grafted with polymer electrolyte. An ECD consisted of Prussian blue (PB), I-VBV, and ferrocene (Fc) was fabricated (PB/Fc/I-VBV ECD) in which Fc acted as a redox mediator. With the utilization of polymer electrolyte, Fc, and immobilization of VBV, the proposed PB/Fc/I-VBV ECD with a UV-curing time of 40 s (PB/Fc/I-VBV-40) exhibited the best cell performance among all conditions in terms of long-term stability. It gives 60.6% transmittance change (δT) at 615 nm initially when switched between 1.2 V and -0.8 V. Short bleaching and coloring times of 1.32 s and 2.13 s were achieved respectively. Moreover, good long-term stability was obtained, maintaining 86.5% of its original δT after 10,000 cycles. The PB/Fc/I-VBV ECD also exhibited a unique memory characteristic among all viologens-based ECDs reported in literatures and allowed the possibility for tuneable multi-electrochromism.
AB - In this study, the electrochromic property of vinyl benzyl viologen (VBV) was first investigated and incorporated in an electrochromic device (ECD). The polymerizable vinyl moiety of VBV enables a self-immobilization through UV-curing under potential bias. Immobilized VBV (I-VBV) was obtained on the electrode and grafted with polymer electrolyte. An ECD consisted of Prussian blue (PB), I-VBV, and ferrocene (Fc) was fabricated (PB/Fc/I-VBV ECD) in which Fc acted as a redox mediator. With the utilization of polymer electrolyte, Fc, and immobilization of VBV, the proposed PB/Fc/I-VBV ECD with a UV-curing time of 40 s (PB/Fc/I-VBV-40) exhibited the best cell performance among all conditions in terms of long-term stability. It gives 60.6% transmittance change (δT) at 615 nm initially when switched between 1.2 V and -0.8 V. Short bleaching and coloring times of 1.32 s and 2.13 s were achieved respectively. Moreover, good long-term stability was obtained, maintaining 86.5% of its original δT after 10,000 cycles. The PB/Fc/I-VBV ECD also exhibited a unique memory characteristic among all viologens-based ECDs reported in literatures and allowed the possibility for tuneable multi-electrochromism.
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U2 - 10.1016/j.solmat.2015.11.044
DO - 10.1016/j.solmat.2015.11.044
M3 - Article
AN - SCOPUS:84950123652
VL - 147
SP - 75
EP - 84
JO - Solar Energy Materials and Solar Cells
JF - Solar Energy Materials and Solar Cells
SN - 0927-0248
ER -