Post-treatment of Nb2O5 Compact la<x>yer in Dye-sensitized Solar Cells for Low-level Lighting Applications | IDCSA, NCHU

Post-treatment of Nb2O5 Compact layer in Dye-sensitized Solar Cells for Low-level Lighting Applications 2019-07-20

設施農業：節能栽培與滅菌【化工系陳志銘特聘教授】

論文篇名	英文：Post-treatment of Nb₂O₅ Compact Layer in Dye-sensitized Solar Cells for Low-level Lighting Applications 中文：後處理氧化鈮阻障層提升染料敏化太陽能電池於弱光下的應用
期刊名稱	Journal of Materials Science: Materials in Electronics
發表年份,卷數,起迄頁數	2019, Vol. 30, Issue 16, pp. 15105-15115
作者	Kai-Wen Chen, Li-Syuan Chen, and Chih-Ming Chen
DOI	10.1007/s10854-019-01883-z
中文摘要	在染料敏化太陽能電池中引入極薄的緻密層於模擬標準太陽光源下(> 100,000 lx)可提升電池的效率。在本研究中，利用簡易的浸泡法在二氧化鈦奈米顆粒之光電極上生成一層極薄且緻密的氧化鈮阻障層，以此具有阻障層的染料敏化太陽能電池進行室內光源(300–6000 lx)的光電轉換效率分析，能明顯觀察到效率大幅提升。由實驗數據可知，在上述兩種不同照度範圍下，電池效率的提升原因不盡相同。在標準強烈的太陽光下，主要是透過改善短路電流密度來改善電池的效率，而短路電流密度的提升可歸因於極小的氧化鈮顆粒附著於相對較大的二氧化鈦顆粒上，使整體表面積增加，提升染料吸附量。而在低照度範圍下，極薄的氧化鈮阻障層可有效抑制電子的逆反應，進而改善填充因子，使電池效能更佳。
英文摘要	Introduction of an ultrathin compact layer in dye-sensitized solar cells (DSSCs) can improve the cell efficiency under standard one sun illumination (> 100,000 lx). Herein, an ultrathin Nb₂O₅ layer is deposited on the TiO₂-coated photoanode using a facial dip-coating method and its effects on the cell efficiency under a low level of light intensity (300–6000 lx) is studied. The results show that the ultrathin Nb₂O₅ layer helps the DSSCs to improve their power conversion efficiency (PCE) through different ways under standard one sun and low power illuminations. Under strong one sun illumination, the PCE of DSSC is improved by improving the short-circuit current density (Jsc) which can be attributed to an increment of the surface area of photoanode for more dye adsorption and the blocking effect of Nb₂O₅. Under low power illumination, the introduction of Nb₂O₅ blocking layer improves the fill factor by effectively suppressing the charge recombination on the photoanode.