Theoretical studies on organoimido-substituted hexamolybdates dyes for dye-sensitized solar cells (DSSC)

Theoretical studies on organoimido-substituted hexamolybdates dyes for dye-sensitized solar cells (DSSC)
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用于染料敏化太阳能电池(DSSC)的有机亚氨基取代六钼酸盐染料的理论研究

DOI:
10.1016/j.dyepig.2013.05.027
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发表时间:
2013-11
期刊:
影响因子:
4.5
通讯作者:
Zhong-Min Su
Zhong-Min Su
中科院分区:
材料科学2区
文献类型:
--
作者:
Hong Li;Na-Na Ma;Li-Kai Yan;Zhong-Min Su

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研究了一系列具有不同π共轭桥的POM基有机-无机杂化物作为敏化剂在染料敏化太阳能电池中的应用。结合密度泛函理论(DFT)和含时DFT(TDDFT)的方法。研究了π共轭间隔基尺寸和π共轭长度对体系光谱的影响。结果表明,随着π共轭间隔基尺寸和π共轭长度的增加,吸收光谱有系统的展宽和红移。对入射光电子转换效率(IPCE)、光捕获效率(LHE)和电子注入效率(Φinj)等关键参数进行了理论分析。结果表明,含噻吩并[3,2-B]噻吩的体系2表现出两个关键因素的平衡,并可能导致DSSC的最高IPC。该研究有助于加深对POM基有机-无机杂化染料的理解,并有助于新型染料的分子设计,为DSSC的进一步优化奠定基础。
A series of POM-based organic–inorganic hybrids with different π-conjugated bridges are investigated as sensitizers for application in dye-sensitized solar cells (DSSCs). A combination of density functional theory (DFT) and time-dependent DFT (TDDFT) approaches is employed. The effects of π-conjugated spacer size and π-conjugation length on the spectra of designed systems are demonstrated. The results show that the absorption spectra are systematically broadened and red-shifted with increasing sizes of the π-conjugated spacer and the length of π-conjugation. The theoretical examination was performed on the key parameters of incident photon-to-electron conversion efficiency (IPCE), light harvesting efficiency (LHE) and electron injection efficiency (Φinj). The result suggests that system2with thieno[3,2-b]thiophene demonstrates a balance of the two crucial factors and may result in the highestIPCEof DSSCs. This study is expected to deepen our understanding of POM-based organic–inorganic hybrid dyes and assist the molecular design of new dyes for the further optimization of DSSCs.
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