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首页> 外文期刊>RSC Advances >Improved stability and enhanced efficiency of dye sensitized solar cells by using europium doped yttrium vanadate down-shifting nanophosphor
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Improved stability and enhanced efficiency of dye sensitized solar cells by using europium doped yttrium vanadate down-shifting nanophosphor

机译：通过使用do掺杂钒酸钇下移纳米荧光粉提高染料敏化太阳能电池的稳定性和效率

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摘要

Through detailed experiments, it has been deduced that ultraviolet (UV) light is a major factor in the degradation of dye-sensitized solar cell (DSSC) performance due to generation of surface defects in nanoporous TiO2 and dye structural modification with free radical formation. We describe a simple spray deposition method to coat europium doped yttrium vanadate (YVO4:Eu3+) down-shifting (DS) phosphor nanoparticles (NPs) on the front side of DSSCs in order to enhance photocurrent and mitigate UV induced degradation. The nanophosphor provides an enhancement in short-wavelength spectral response of solar cells, and long-term stability is also improved under illumination, due to down-shifting of high energy UV photons to the visible region. Our observations demonstrate that the DS nanophosphor layer can be used as an optical filter with visible light transmission and UV light absorption, through placement on the front surface of DSSCs to provide stability, as well as for improving the performance.
机译：通过详细的实验，可以推断出紫外线（UV）是导致染料敏化太阳能电池（DSSC）性能下降的主要因素，这是由于在纳米多孔TiO2中产生了表面缺陷以及具有自由基形成作用的染料结构修饰。我们描述了一种简单的喷涂方法，可在DSSC的正面涂覆do掺杂钒酸钇（YVO4：Eu3 +）下移（DS）磷光体纳米颗粒（NP），以增强光电流并减轻UV诱导的降解。纳米磷光体增强了太阳能电池的短波长光谱响应，并且由于高能紫外光子向可见光区的下移，在光照下的长期稳定性也得到了改善。我们的观察结果表明，通过将DS纳米磷光体层放置在DSSC的前表面上，可以提供可见光透射和紫外线吸收的滤光器，以提供稳定性并改善性能。

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