Yadav Surendra K, Ravishankar Sandheep, Pescetelli Sara, Agresti Antonio, Fabregat-Santiago Francisco, Di Carlo Aldo
C.H.O.S.E. (Centre for Hybrid and Organic Solar Energy), Department of Electronic Engineering, University of Rome "Tor Vergata", via del Politecnico 1, Rome, 00133, Italy.
Phys Chem Chem Phys. 2017 Aug 23;19(33):22546-22554. doi: 10.1039/c7cp04598k.
In the last few decades, dye-sensitized solar cell (DSC) technology has been demonstrated to be a promising candidate for low cost energy production due to cost-effective materials and fabrication processes. Arguably, DSC stability is the biggest challenge for making this technology appealing for industrial exploitation. This work provides further insight into the stability of DSCs by considering specific dye-electrolyte systems characterized by Raman and impedance spectroscopy analysis. In particular, two ruthenium-based dyes, Z907 and Ru505, and two commercially available electrolytes, namely, the high stability electrolyte (HSE) and solvent-free Livion 12 (L-12), were tested. After 4700 h of thermal stress at 85 °C, the least stable device composed of Z907/HSE showed an efficiency degradation rate of ∼14%/1000 h, while the Ru505/L-12 system retained 96% of its initial efficiency by losing ∼1% each 1000 h. The present results show a viable route to stabilize the DSC technology under prolonged annealing conditions complying with the IEC standard requirements.
在过去几十年里，染料敏化太阳能电池（DSC）技术因其具有成本效益的材料和制造工艺，已被证明是低成本能源生产的一个有前景的候选技术。可以说，DSC的稳定性是使该技术吸引工业应用的最大挑战。这项工作通过考虑以拉曼光谱和阻抗谱分析为特征的特定染料-电解质体系，进一步深入研究了DSC的稳定性。具体而言，测试了两种钌基染料Z907和Ru505，以及两种市售电解质，即高稳定性电解质（HSE）和无溶剂的Livion 12（L-12）。在85℃下进行4700小时的热应力测试后，由Z907/HSE组成的最不稳定器件的效率降解率约为14%/1000小时，而Ru505/L-12体系每1000小时损失约1%，仍保留其初始效率的96%。目前的结果表明了一条在符合IEC标准要求的长时间退火条件下稳定DSC技术的可行途径。
