色素敏化染料
材料科学
介孔材料
能量转换效率
光散射
电解质
光电子学
图层(电子)
散射
纳米技术
电极
光学
化学
物理
物理化学
催化作用
生物化学
作者
Carolina Hora,Fátima Santos,M. Goreti F. Sales,Dzmitry Ivanou,Adélio Mendes
出处
期刊:ACS Sustainable Chemistry & Engineering
[American Chemical Society]
日期:2019-07-12
卷期号:7 (15): 13464-13470
被引量:35
标识
DOI:10.1021/acssuschemeng.9b02990
摘要
Progress in dye-sensitized solar cells (DSSCs) has been benchmarked with N719 dye-based devices. However, power conversion efficiency (PCE) improvements performed in low-energy-performing devices cannot be extrapolated to high-performing ones. This points to the need for using a high PCE reference DSSC device, which preferably should be possible for preparation using readily available commercial reactants and parts. This study reports an optimized DSSC prepared with commercial reactants, displaying a PCE of up to 9.84% under simulated solar light and of 28.7% under artificial room light. The efficient light harvesting in the photoanode and electron recombination suppression in the photoanode/electrolyte interface were systematically optimized; the thickness and light-scattering ability of the photoanode mesoporous layers were tuned to maximize light harvesting and minimize the recombination losses. Electron back recombination with electrolyte was minimized using a TiO2 blocking layer and treating the mesoporous layer of TiO2 with TiCl4. Finally, despite the use of a light-scattering TiO2 coating over the mesoporous layer, the use of a light reflection layer applied to the back of the devices proved to improve the PCE further.
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