量子點敏化太陽能電池使用液態電解液常有揮發、洩漏的問題，大多數文獻使用膠態電解液替換。但普遍使用高分子添加所製備的膠態電解液有離子導電度下降，不利於電子傳遞的問題。
本實驗運用黃原膠的流變特性添加入電解液中製備成膠態電解液克服洩漏之問題，並加入二氧化鈦奈米粒子改善電子傳遞及提升溶液離子導電度以提升電池元件的光電轉換效率。
製備成膠態電解液有效抑制電子電洞再結合，改善電池元件間的介面阻抗，而添加二氧化鈦奈米粒子可調整光電極費米能階使開路電壓上升，以最佳化膠態電解液添加3wt%二氧化鈦有最佳效率，於CIS系統效率從6.48 ± 0.15% 提升至7.06± 0.06%，CISe系統可由6.79 ± 0.10% 提升至8.00 ± 0.21%，大幅改善光電轉換效率，及此電解液可廣泛應用於Ⅰ-Ⅲ-Ⅵ族量子點敏化電池中。

Despite to the higher power conversion efficiencies of quantum dot sensitized solar cells (QDSSCs), photovoltaic devices that employ liquid electrolytes suffer from problems like long-term instability caused by leakage and volatilizations of electrolytes.
In this study, to improve the stability, sealing, and conversion efficiency of the liquid-junction QDSSCs, an alternative electrolyte, gel electrolytes using organic polymer and inorganic nanoparticle (NP) gelators was attempted.
Herein, we developed a noble water-based polymer gel electrolyte utilizing Xanthan gum (XG), which has thixotropic property, higher water solubility and environmentally friendly. Owing to the lower mobility of electrons in the liquid-junction TiO2 NPs was added which can improve ion conductivity and charge transfer.
The charge recombination at the photoanode/electrolyte interface was emarkably inhibited with the addition of XG and TiO2 NP to the polysulfide electrolyte. Additionally, incorporation of TiO2 NPs increases VOC by adjusting photoanode fermi level. With our best condition XG/NP electrolyte, the efficiency of CIS-based QDSSCs was improved from 6.48 ± 0.15% to 7.06 ± 0.06%. And the efficiency of CISe-based QDSSCs was improved from 6.79 ± 0.10% to 8.00 ± 0.21%. To the best of our knowledge, this is the highest efficiency based on water-based XG/TiO2 electrolytes for CIS and CISe QDSSCs.

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