2.2. Preparing and measuring the working electrode
The procedure for fabricating a working electrode of TiO2 (P-
25)/BCP composite particles (Fig. 1) included: (1) preparation of
the colloid by mixing TiO2 (P-25)/BCP composite particles (1 g)
with ethanol (4 mL), acetylacetone (0.4 mL), and Triton X-100
(0.05 mL); (2) deposition of colloid on top of a FTO-glass substrate
with the TiCl4 treatment; (3) sintering of this substrate at 450 C
for 1 h in a high-temperature furnace (Table 2); and (4) immersion
of this substrate with TiO2 (P-25)/BCP thin film into the solution of
N-719 dye and ethyl alcohol at 70 C for 6 h. In this study, using a
spin coater (MSC 300D), the colloid of TiO2 (P-25)/BCP was
deposited on top of a FTO-glass substrate using two-stage coating
process: (1) in the 1st stage, the colloid was deposited with
1000 rpm for 10 s; and (2) the colloid was deposited again with
1500 rpm for 15 s in the 2nd stage. The process of preparing working
electrode was detailed in our previous works [7,19]. Further,
TiO2 (P-25) working electrodes were prepared following above
process to show the advantage of BCP addition, compared with a
conventional DSSC with a TiO2 (P-25) electrode. All samples were
0.25 cm2 in area.
2.2. Preparing and measuring the working electrodeThe procedure for fabricating a working electrode of TiO2 (P-25)/BCP composite particles (Fig. 1) included: (1) preparation ofthe colloid by mixing TiO2 (P-25)/BCP composite particles (1 g)with ethanol (4 mL), acetylacetone (0.4 mL), and Triton X-100(0.05 mL); (2) deposition of colloid on top of a FTO-glass substratewith the TiCl4 treatment; (3) sintering of this substrate at 450 Cfor 1 h in a high-temperature furnace (Table 2); and (4) immersionof this substrate with TiO2 (P-25)/BCP thin film into the solution ofN-719 dye and ethyl alcohol at 70 C for 6 h. In this study, using aspin coater (MSC 300D), the colloid of TiO2 (P-25)/BCP wasdeposited on top of a FTO-glass substrate using two-stage coatingprocess: (1) in the 1st stage, the colloid was deposited with1000 rpm for 10 s; and (2) the colloid was deposited again with1500 rpm for 15 s in the 2nd stage. The process of preparing workingelectrode was detailed in our previous works [7,19]. Further,TiO2 (P-25) working electrodes were prepared following aboveprocess to show the advantage of BCP addition, compared with aconventional DSSC with a TiO2 (P-25) electrode. All samples were0.25 cm2 in area.
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