本研究利用極性溶液易吸收微波特性，將低毒性金屬前驅物與雙功能分子共反應，以微波輔助直接一步合成出三元素半導體CuInS2水相量子點，大幅縮短反應時間，此種技術與傳統油相製程不同的是所合成出來的量子點在過程中無須在真空環境下，不需進行相轉移過程，且減少大量有機溶劑，對環境較有善。透過具有巰基分子作為共吸附劑與水相量子點混合而成量子點敏化水溶液，並將TiO2光電極浸泡於量子點敏化溶液，接著再用連續離子吸附與反應沉積ZnS鈍化層，與實驗室所發展的Cu2S背電極組裝成電池後，光電轉換效率可達4.92%，並以電化學阻抗分析與光強度調製光電流/光電壓分析儀分析不同雙功能分子製成的水相CIS量子點，探討水相量子點與TiO2之間的電子傳遞動力學。

Recently, synthesis of colloidal QDs by microwave irradiation as heating source have been studied due to the inherently different mechanisms of heat transfer, when compared to solvent convection based heating. Under microwave irradiation, polar precursor molecules directly absorb the microwave energy and heats up more efficiently. Here we present a simple, rapid and effective method of microwave-assisted synthetic route for the preparation of water-soluble CuInS2 quantum dots (CIS QDs) with thioalkyl compound as co-adsorbent for QDSSC. Briefly, the solar cell were constructed with CuInS2 quantum dots, thioalkyl compound as co-adsorbent deposited on TiO2 film. Further ZnS deposited as passivation layer by successive ionic layer adsorption and reaction (SILAR). Combining the Cu2S spin coated counter electrode achieved an improved short circuit current density of 14.84 mA/cm2, open voltage of 630 mV and power conversion efficiency of 4.92% at one sun (AM 1.5 G, 100 mW/cm2). Electrochemical impedance spectroscopy (EIS), intensity modulated photocurrent / photovoltage spectroscopy (IMPS/ IMVS) measurement water based CIS Qds made with different bifunctional molecules, discussion the electron transport time and electron lifetime between TiO2 and CIS QDs.

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