Molecular design and performance of hydroxylpyridium sensitizers for dye-sensitized solar cells.
Molecular design and performance of hydroxylpyridium sensitizers for dye-sensitized solar cells.
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DOI：
10.1021/am4010545
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发表时间：
2013-05
影响因子：
9.5
通讯作者：
Jianghua Zhao;Xichuan Yang;Ming Cheng;Shifeng Li;Licheng Sun
中科院分区：
文献类型：
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作者：
Jianghua Zhao;Xichuan Yang;Ming Cheng;Shifeng Li;Licheng Sun
合成了四种羟基吡啶有机染料并将其应用于染料敏化太阳能电池（DSSC）。羟基吡啶作为电子受体引入供体-π-共轭桥-受体（D-π-A）体系中。传统的锚定基团，例如羧基，被羟基取代。研究发现羟基吡啶的存在对染料JH401-JH404的吸收光谱有很大影响。 JH系列染料以己基噻吩为π共轭桥，三苯胺、吩噻嗪及其衍生物为电子给体。通过光物理、光伏和电化学方法研究了不同结构的染料的性能。当应用于 DSSC 时，敏化剂 JH401 在 100 mW/cm(2) 光照下产生最佳效率，为 2.6%（Jsc = 6.35 mA/cm(2)，Voc = 605 mV，FF = 67.6%）。其最大入射光子到电流的转换效率（IPCE）在440 nm光波长下为80%，这是迄今为止羟基吸附有机染料达到的最高IPCE值。
Four hydroxylpyridium organic dyes were synthesized and applied in dye-sensitized solar cells (DSSCs). Hydroxylpyridium was introduced as an electron acceptor in donor-π-conjugated bridge-acceptor (D-π-A) system. The traditional anchoring groups, such as the carboxyl group, were replaced by hydroxyl group. It was found that the existence of the hydroxylpyridium exhibits a large effect on the absorption spectra of dyes JH401-JH404. For JH series of dyes, hexylthiophene was employed as the π-conjugated bridge, and triphenylamine, phenothiazine, and their derivatives were used as the electron donor. The performances of the dyes with different structure were investigated by photophysical, photovoltaic, and electrochemical methods. When applied in the DSSCs, the sensitizer JH401 yields the best efficiency, 2.6% (Jsc = 6.35 mA/cm(2), Voc = 605 mV, FF = 67.6%) under 100 mW/cm(2) light illumination. Its maximum incident photon-to-current conversion efficiency (IPCE) is 80% at 440 nm light wavelength, which is the highest IPCE value achieved with hydroxyl group adsorbent organic dyes so far.