| 摘要: | 具光致變色性質的染料敏化太陽能電池 ( Dye-Sensitized Solar Cell, DSCs ) 不僅有製作過程簡易和成本低等優點外，還有因照光而引發具有可逆性的顏色改變，所以適合應用於建築光電領域。光致變色DSC中的光致變色性質大多源於光電極上的光致變色染料或共吸附劑，因此本研究是以本實驗室所合成DNPBT、RuSO、PC-Na、PC-TBA、PC-Cl和PC-NCS共六種含光致變色單元的染料作為敏化劑來組裝元件。其中有機光致變色染料DNPBT所敏化元件在照光(AM 1.5G) 20 min後元件的顏色從橘色變成深紅色，照光後放置暗室(24 hr)元件的顏色從深紅色變回橘色。釕錯合物染料中RuSO無固著配位基因此無法做為敏化劑組裝元件，PC-Na有兩個固著配位基且所敏化元件在照光 20 min後，IPCE曲線在450~600 nm的IPCE(%)值皆有增加，在510 nm有最大的變化從35.49%增加至42.11%，隨後放置暗室則使該波段數值降低，510 nm 處的數值也減少至32.87%，此變化與該染料溶液的吸收光譜在照光前、後和照光後放置暗室趨勢一致；PC-Na所敏化元件從J-V curve所測得之Jsc值在照光後增加了33.23%(從6.17增加到8.22 mA/cm2)，隨後放置暗室則減少到5.78 mA/cm2 ，與在未照光時的差異度為6.32%。PC-TBA所敏化元件在照光後在510 nm處的數值從30.88%增加到36.88%，照光後放置暗室減少至29.93%，在450~600 nm趨勢和PC-Na所敏化元件的相同，從J-V curve所測得之Jsc值在照光後增加了21.17%(從6.14增加到7.44 mA/cm2)，之後放置暗室與在未照光時的差異度為2.20%，與PC-Na敏化元件趨勢一致。PC-Cl和PC-NCS敏化元件照光前、後和照光後放置暗室的IPCE曲線和J-V curve所測得之Jsc值趨勢皆與PC-Na所敏化元件的不同。;Photochemically switchable dye-sensitized solar cells (Dye-Sensitized Solar Cells, DSCs) not only offer advantages such as a simple fabrication process and low cost, but also exhibit reversible color changes upon light irradiation, making them suitable for building-integrated photovoltaic applications. In photochromic DSCs, the photochromic behavior mainly originates from photochromic dyes or co-adsorbents on the photoanode. Therefore, in this study, six photochromic-unit-containing dyes synthesized in our laboratory—DNPBT, RuSO, PC-Na, PC-TBA, PC-Cl, and PC-NCS—were employed as sensitizers to assemble DSC devices. Among them, the device sensitized with the organic photochromic dye DNPBT changed its color from orange to dark red after 20 min of illumination (AM 1.5G), and then reverted from dark red back to orange after being kept in the dark for 24 h. For the ruthenium complex dyes, RuSO could not be used to fabricate a device because it lacks anchoring ligands and therefore cannot act as a sensitizer. PC-Na contains two anchoring ligands, and its sensitized device showed increased IPCE(%) values across 450–600 nm after 20 min of illumination; the largest change occurred at 510 nm, where the IPCE increased from 35.49% to 42.11%. Subsequently, keeping the device in the dark led to a decrease in this spectral region, with the value at 510 nm dropping to 32.87%. This trend is consistent with the absorption spectra of the dye solution measured before illumination, after illumination, and after illumination followed by dark storage. From the J–V curves, the short-circuit current density (Jsc) of the PC-Na-sensitized device increased by 33.23% after illumination (from 6.17 to 8.22 mA cm⁻²), and then decreased to 5.78 mA cm⁻² after dark storage, showing a 6.32% difference compared with the initial value before illumination. For the PC-TBA-sensitized device, the IPCE at 510 nm increased from 30.88% to 36.88% after illumination and decreased to 29.93% after subsequent dark storage; the trend over 450–600 nm was similar to that of the PC-Na-sensitized device. The Jsc obtained from the J–V curves increased by 21.17% after illumination (from 6.14 to 7.44 mA cm⁻²), and the difference between the value after dark storage and that before illumination was 2.20%, consistent with the trend observed for the PC-Na-sensitized device. In contrast, the changes in both the IPCE curves and the Jsc values derived from the J–V curves for the PC-Cl- and PC-NCS-sensitized devices before illumination, after illumination, and after illumination followed by dark storage were different from those of the PC-Na-sensitized device. |
