TY - JOUR
T1 - A novel photoelectrochromic device with dual application based on poly(3,4-alkylenedioxythiophene) thin film and an organic dye
AU - Hsu, Chih Yu
AU - Lee, Kun Mu
AU - Huang, Jen Hsien
AU - Justin Thomas, K. R.
AU - Lin, Jiann T.
AU - Ho, Kuo Chuan
PY - 2008/12/1
Y1 - 2008/12/1
N2 - A novel photoelectrochromic device (PECD) with dual application was studied using an electrochromic polymer thin film, poly(3,3-diethyl-3,4-dihydro-2H-thieno-[3,4-b][1,4]dioxepine) (PProDot-Et2), and an organic photosensitive dye, FL dye1, which was adsorbed on a TiO2 electrode. In the presence of the redox couple, the electron transfer reaction at the electrolyte/PProDot-Et2 conducting polymer interface was found to determine the electrochromism of the PECD. The rate constants of the electron transfer (k0) for different redox couples at the PProDot-Et2 film were obtained by using electrochemical impedance spectroscopy (EIS) and were correlated with the coloration depth of the thin film. Since I-/I3- and Br-/Br3- couples possess the highest and the lowest k0 value, respectively, the PECD was investigated using these two redox couples under constant light illumination of 50 mW cm-2. The I-/I3- couple provided a higher short circuit current density (JSC) when acting as a dye-sensitized solar cell (DSSC), thus the switching response upon coloration (ca. 3 s) was much faster than that of the PECD using the Br-/Br3- couple (ca. 2 min). On the contrary, the PECD using Br-/Br3- exhibited a larger transmittance attenuation of ca. 33.7%, in comparison to that using I-/I3- (ca. 14.1%).
AB - A novel photoelectrochromic device (PECD) with dual application was studied using an electrochromic polymer thin film, poly(3,3-diethyl-3,4-dihydro-2H-thieno-[3,4-b][1,4]dioxepine) (PProDot-Et2), and an organic photosensitive dye, FL dye1, which was adsorbed on a TiO2 electrode. In the presence of the redox couple, the electron transfer reaction at the electrolyte/PProDot-Et2 conducting polymer interface was found to determine the electrochromism of the PECD. The rate constants of the electron transfer (k0) for different redox couples at the PProDot-Et2 film were obtained by using electrochemical impedance spectroscopy (EIS) and were correlated with the coloration depth of the thin film. Since I-/I3- and Br-/Br3- couples possess the highest and the lowest k0 value, respectively, the PECD was investigated using these two redox couples under constant light illumination of 50 mW cm-2. The I-/I3- couple provided a higher short circuit current density (JSC) when acting as a dye-sensitized solar cell (DSSC), thus the switching response upon coloration (ca. 3 s) was much faster than that of the PECD using the Br-/Br3- couple (ca. 2 min). On the contrary, the PECD using Br-/Br3- exhibited a larger transmittance attenuation of ca. 33.7%, in comparison to that using I-/I3- (ca. 14.1%).
KW - Dye-sensitized solar cell (DSSC)
KW - Electron transfer
KW - Organic dye
KW - Photoelectrochromic device (PECD)
KW - Poly(3,4-alkylenedioxythiophene)
UR - http://www.scopus.com/inward/record.url?scp=56049106061&partnerID=8YFLogxK
U2 - 10.1016/j.jpowsour.2008.09.031
DO - 10.1016/j.jpowsour.2008.09.031
M3 - 文章
AN - SCOPUS:56049106061
SN - 0378-7753
VL - 185
SP - 1505
EP - 1508
JO - Journal of Power Sources
JF - Journal of Power Sources
IS - 2
ER -