Electrochromic Performance of WO<sub>3</sub> Films Prepared by Polymeric Precursor Method

Wenjing Chu; Chunliang Lin; Youwei Zheng; Jinxi Lin; Jinhan Lin; Jianhua Qiu

doi:10.3788/AOS201838.0216002

Acta Optica Sinica, Volume. 38, Issue 2, 0216002(2018)

Electrochromic Performance of WO₃ Films Prepared by Polymeric Precursor Method

Wenjing Chu^1、*, Chunliang Lin¹, Youwei Zheng¹, Jinxi Lin¹, Jinhan Lin¹, and Jianhua Qiu²

Author Affiliations

¹ Provincial Photoelectric Glass Key Laboratory, Changzhou Almaden CO., Ltd., Changzhou, Jiangsu 213000, China

² Jiangsu Collaborative Innovation Center of Photovoltaic Science and Engineering, Changzhou University, Changzhou, Jiangsu 213000, China

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Figures & Tables(13)

Fig. 1. XRD patterns of (a) standard WO3, (b) FTO, and (c) WO3 films with different mixture ratios

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Fig. 2. Surface morphologies of WO3 films with different mixture ratios. (a) Sample 1; (b) sample 2; (c) sample 3; (d) sample 4; (e) sample 5

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Fig. 3. (a) Cyclic voltammograms and (b) double potential step current curves of WO3 films with different mixture ratios

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Fig. 4. Structural diagrams of WO3 films with different mixture ratios. (a) Low polymer content; (b) moderate polymer content; (c) high polymer content

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Fig. 5. (a) Transmittance spectrum and (b) reflectance spectrum of WO3 films under colored and bleached states

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Fig. 6. (a) Absorptance spectrum and (b) radiation spectrum of WO3 films

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Fig. 7. Current versus time in colored and bleached processes

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Table 1. Compositions of polymeric precursor solution, experimental conditions and film thicknesses
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Table 1. Compositions of polymeric precursor solution, experimental conditions and film thicknesses
Sample number Mass of AMT /g Volume of deionized water /mL Mass fraction of Pluronic F127 /% Thickness of films /nm
1 4 8 16 333.7
2 4 8 20 338.6
3 4 8 26 335.1
4 4 8 29 340.7
5 4 8 31 347.5

Table 2. Grain sizes of WO3 films with different mixture ratios obtained by calculation
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Table 2. Grain sizes of WO3 films with different mixture ratios obtained by calculation
Sample number 1 2 3 4 5
Grain size /nm 16.15 17.06 17.16 17.25 16.23

Table 3. Main optical performance parameters of WO3 films
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Table 3. Main optical performance parameters of WO3 films
State $\begin{matrix} {T_{Solar}}_{} \end{matrix}$ /% $\begin{matrix} {T_{Lig h t}}_{} \end{matrix}$ /% $\begin{matrix} {T_{IR}}^{} \end{matrix}$ /% △ $\begin{matrix} {T_{Lig h t}}^{} \end{matrix}$ /% △D_Solar △D_Light △D_IR
Bleached state 49.51 72.60 31.68 62.68 0.749 0.864 2.656
Colored state 8.83 9.92 0.07

Table 4. Optical performance parameters of WO3 films under temperature of 298 K
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Table 4. Optical performance parameters of WO3 films under temperature of 298 K
State $\begin{matrix} {T_{Solar}}_{} \end{matrix}$ /% $\begin{matrix} {R_{Solar}}_{} \end{matrix}$ /% $\begin{matrix} {A_{Solar}}_{} \end{matrix}$ /% ε_i $\begin{matrix} {q_{i}}_{} \end{matrix}$ /% g /%
Bleached state 49.51 15.98 34.51 0.6270 7.99 57.50
Colored state 8.83 22.82 68.35 0.3777 13.39 22.22

Table 5. Optical performance parameters of WO3 films under temperature of 323 K
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Table 5. Optical performance parameters of WO3 films under temperature of 323 K
State $\begin{matrix} {T_{Solar}}_{} \end{matrix}$ /% $\begin{matrix} {R_{Solar}}_{} \end{matrix}$ /% $\begin{matrix} {A_{Solar}}_{} \end{matrix}$ /% ε_i $\begin{matrix} {q_{i}}_{} \end{matrix}$ /% g /%
Bleached state 49.51 15.98 34.51 0.6309 8.00 57.51
Colored state 8.83 22.82 68.35 0.3777 13.39 22.22

Table 6. Optical modulation range and optical density difference in visible region of WO3 films prepared by different methods
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Table 6. Optical modulation range and optical density difference in visible region of WO3 films prepared by different methods
Method Method 1 Method 2 Method 3 Method 4 Method 5
△ $\begin{matrix} {T_{Lig h t}}_{} \end{matrix}$ /% 52.33 23 40 42.9 62.68
△D_Light 0.687 0.179 0.225 0.354 0.864

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Wenjing Chu, Chunliang Lin, Youwei Zheng, Jinxi Lin, Jinhan Lin, Jianhua Qiu. Electrochromic Performance of WO₃ Films Prepared by Polymeric Precursor Method[J]. Acta Optica Sinica, 2018, 38(2): 0216002

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Paper Information

Category: Materials

Received: Jul. 31, 2017

Accepted: --

Published Online: Aug. 30, 2018

The Author Email: Wenjing Chu (wjchu@czamd.com)

DOI:10.3788/AOS201838.0216002

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology

Table 1. Compositions of polymeric precursor solution, experimental conditions and film thicknesses

Table 1. Compositions of polymeric precursor solution, experimental conditions and film thicknesses

Table 2. Grain sizes of WO3 films with different mixture ratios obtained by calculation

Table 2. Grain sizes of WO3 films with different mixture ratios obtained by calculation

Table 3. Main optical performance parameters of WO3 films

Table 3. Main optical performance parameters of WO3 films

Table 4. Optical performance parameters of WO3 films under temperature of 298 K

Table 4. Optical performance parameters of WO3 films under temperature of 298 K

Table 5. Optical performance parameters of WO3 films under temperature of 323 K

Table 5. Optical performance parameters of WO3 films under temperature of 323 K

Table 6. Optical modulation range and optical density difference in visible region of WO3 films prepared by different methods

Table 6. Optical modulation range and optical density difference in visible region of WO3 films prepared by different methods