本研究利用Li₂O混合 WO₃ 製備出Lix WO₃ 粉末，並使用電子束蒸鍍法製備電致色變薄膜，藉由掺雜方式增加薄膜之離子遷出入量，使得電致色變元件(Electrochromic device, ECD)具有更佳的電致色變特性。以PET/ITO/膠態電解質(Gel polymer electrolyte, GPE) /Li0.2 WO₃/ITO/PET 結構之ECD 在驅動電壓3.5 V 時具有最佳之電致色變特性，其在波長550 nm 時，光學穿透率差(ΔT%)為33%，光學密度差(ΔOD)為7.56，消耗電荷量(Q)為5.94 mC/cm2 及著色效率(η)為92 cm2/C。元件在著色後，於室溫下放置24 小時之光學穿透率從7%上升到38%。

In this study, Li₂O is doped to WO₃ to prepare Lix WO₃ powder and the electron beam evaporation is used to fabricate electrochromic films, expecting to increase the amount of ions moved in/out by doping, the electrochromic device (ECD) with better electrochromic characteristics can be obtained. With PET/ITO/Gel polymer electrolyte (GPE)/Li0.2 WO₃/ITO/PET structure, the best ECD characteristics can be obtained at the drive voltage of 3.5 V, the transmittance variations (ΔT%) at the wavelength of 550 nm is 33%, optical density variations (ΔOD) is 7.56, the intercalation charge (Q) is 5.94 mC/cm2 and the coloration efficiency (η) is 92 cm2/C. After this ECD was colored for 24 hours, the transmittance increases from 7% to 38% at room temperature (R.T.).