Dye-sensitized solar cells with 13% efficiency achieved through the molecular engineering of porphyrin sensitizers
Dye-sensitized solar cells with 13% efficiency achieved through the molecular engineering of porphyrin sensitizers
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DOI：
10.1038/nchem.1861
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发表时间：
2014-03-01
期刊：
影响因子：
21.8
通讯作者：
Graetzel, Michael
中科院分区：
文献类型：
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作者：
Mathew, Simon;Yella, Aswani;Graetzel, Michael
近年来，染料敏化太阳能电池因其生产成本低、易于制造以及可调节的光学特性（例如颜色和透明度）而受到广泛关注。在这里，我们报告了一种分子工程卟啉染料，编码为 SM315，其具有供体-π-桥-受体的原型结构，既最大限度地提高了电解质兼容性，又提高了光捕获性能。线性响应、时间相关的密度泛函理论被用来研究电子结构中的扰动，从而改善光捕获。将SM315与钴(II/III)氧化还原梭结合使用，染料敏化太阳能电池具有0.91 V的高开路电压V-OC、18.1 mA cm(-2)的短路电流密度J(SC)、0.78的填充因子和13%的功率转换效率。
Dye-sensitized solar cells have gained widespread attention in recent years because of their low production costs, ease of fabrication and tunable optical properties, such as colour and transparency. Here, we report a molecularly engineered porphyrin dye, coded SM315, which features the prototypical structure of a donor-pi-bridge-acceptor and both maximizes electrolyte compatibility and improves light-harvesting properties. Linear-response, time-dependent density functional theory was used to investigate the perturbations in the electronic structure that lead to improved light harvesting. Using SM315 with the cobalt(II/III) redox shuttle resulted in dye-sensitized solar cells that exhibit a high open-circuit voltage V-OC of 0.91 V, short-circuit current density J(SC) of 18.1 mA cm(-2), fill factor of 0.78 and a power conversion efficiency of 13%.