利用改良式預混燃燒器火焰添加TTIP以氣相燃燒合成奈米級TiO2顆粒,將收集到之TiO2粉末製備成染料敏化太陽能電池,當Φ=1、O2/N2=40/60、TTIP= 200NL/min、收集高度h=3cm時,燃燒合成之奈米級TiO2顆粒粒徑約25nm且晶相為anatase(97.7 %),將燃燒合成TiO2粉末製備之染料敏化太陽能電池與市售之P25 TiO2粉末所製成之染料敏化太陽能電池做比較。 染料敏化太陽能電池之製備主要探討染料敏化太陽能電池 (dye-sensitized solar cells, DSSCs) 之光電極、染料及對電極等數個研究方向,建立實驗與研究方法。光電極方面為刮刀成膜法(doctor blade method),討論製作 TiO2 薄膜厚度、燒結溫度以及不同之TiO2粉末(P25與燃燒合成TiO2粉末)其光電效能,結果為TiO2薄膜燒結溫度越高,所產生光電效率越好,當燒結溫度460°C時效率最高;塗佈三層TiO2薄膜厚度之染料敏化太陽能電池效率最好;在不同粉體中以P25之光電轉換效率優於燃燒合成TiO2粉末。對電極研究之燒結溫度討論,碳黑製作之對電極在溫度上亦和光電極有著同樣的趨勢,溫度越高則光電效能越高,當燒結溫400°C時對電級之效率為最高。分別浸泡染料茜素黃(Alizarin yellow)與葉綠素(Chlorophyllin)18小時和先後浸泡此兩種染料各9小時,單一染料以茜素黃(Alizarin yellow)最佳,並發現浸泡兩種染料光電極,其光電效應皆不好。
Flame synthesis of nanosized titanium oxide particles with the precursor titanium isopropoxide (TTIP) were studied by the modified Hencken burner. Particles produced in these flames were studied for their morphology, crystal phase purity, and size. Results from X-ray diffraction (XRD) analyses show that TiO2 crystal phase purity may be effectively controlled by the oxygen concentration, and the size of TiO2 nanoparticles is highly depending on the TTIP loading and the collecting height of the flame. Also, purer (anatase: 97.7 %) and smaller (about 25 nm) anatase TiO2 nanoparticles are formed under the conditions of TTIP=200NL/min, O2/N2=40/60, H=3.0 cm andΦ=1.0. Furthermore, dye-sensitized solar cells are successfully developed by using a dye-sensitized nanocrystalline TiO2 film. Dye-sensitized TiO2 solar cells, DSSC, are a promising alternative for the development of a new generation of photovoltaic devices. DSSC are a successful combination of materials, consisting of a transparent electrode coated with a dye-sensitized mesoporous film of nanocrystalline particles of TiO2, an electrolyte containing a suitable redox-couple and a carbon black coated counter-electrode. Alizarin yellow and chlorophyllin are used as the dyesensitizers. The light-to-energy conversion performance of the cell depends on the relative energy levels of the semiconductor and dye and on the kinetics of the electron-transfer processes at the sensitized semiconductor electrolyte interface. The rate of these processes depends on the properties of its components. This contribution presents a discussion on the influence of each of the materials which constitute the DSSC of the overall process for energy conversion.