使用吸收光譜涵蓋近紅外光波段之紫質染料之高效率染料敏化太陽能電池

紫質敏化染料分子（porphyrin-based dye）具有很強的莫耳吸光係數（molar absorption coefficients），對染料敏化太陽能電池（Dye-Sensitized Solar Cells，DSSCs）元件之光電流有很大助益。然而紫質染料在浸泡吸附過程中，可能出現分子聚集（aggregation）現象，因而降低元件表現。因此其製程中，必須採取適當之浸泡吸附方法。本研究採用吸收光譜涵蓋近紅外（near-IR）波段之紫質敏化染料（LWP系列），著重研究浸泡染料�清洗之吸附程序，以改善分子聚集現象、優化元件表現，並比較LWP系列各染料元件之效率。另一方面，以不同紫質染料分子作共敏化吸附（co-sensitized），進一步增進元件表現。輔以阻抗特性之探討，確認不同浸泡吸附程序之優化效果。

關鍵字

染料敏化太陽能電池；紫質染料；分子聚集；共敏化；電化學阻抗頻譜

並列摘要

Due to their large molar absorption coefficients, porphyrin-based dyes provide great improvement to the photocurrents of Dye-Sensitized Solar Cells (DSSCs). However, dye aggregation might lower the performance of devices. Therefore, suitable dye soaking conditions are essential. In this study, a series of porphyrin-based dyes (LWP series) with absorption spectra covering near-IR regions were used in the fabrication of DSSCs. Different dye soaking/washing processes were adopted to lessen dye aggregation and thus to optimize performance of devices. The device performances of DSSCs using porphyrin dyes were further enhanced with co-sensitization. All devices were also characterized by impedance spectroscopy to study effects of dye soaking processes.

並列關鍵字

Dye-Sensitized Solar Cells (DSSCs) ； porphyrin-based dye ； aggregation ； co-sensitized ； electrochemical impedance spectroscopy (EIS)

參考文獻

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使用吸收光譜涵蓋近紅外光波段之紫質染料之高效率染料敏化太陽能電池

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