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首页> 外文期刊>RSC Advances >Novel BODIPY dyes with electron donor variety for dye-sensitized solar cells
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Novel BODIPY dyes with electron donor variety for dye-sensitized solar cells

机译：新型BODIPY染料，具有电子给体，可用于染料敏化太阳能电池

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摘要

Four new donor–π–acceptor (D–π–A) structured organic sensitizers (CB1-4), with N-octyl or N-methoxyphenyl carbazole connected to a 2-cyanoacrylate BODIPY module through their 2 or 3-positions, were designed and synthesized for application in dye-sensitized solar cells (DSSCs). The photophysical and electrochemical properties were systematically studied and their performances as sensitizers in DSSCs were comparatively investigated. The structure–property relationship suggests that the electron-donating ability and substitution positions of the donor have a significant effect on these dyes' electronic and photovoltaic properties. Electron-rich N-methoxyphenyl carbazole as a donor and substitution at the 2-position shows a positive influence on the efficiency of DSSCs. Consequently, CB4, with the combination of these advantages, presents the broadest (300–650 nm) and strongest absorption profile with a high extinction coefficient (1.71 × 105 M?1 cm?1) and the best photovoltaic performance with a short circuit photocurrent density of 10.20 mA cm?2, an open circuit voltage of 600 mV, and a fill factor of 0.7, corresponding to a fairly good overall conversion efficiency of 4.28% under AM 1.5 irradiation (100 mW cm?2).
机译：四种新的供体-π-受体（D-π-A）结构的有机敏化剂（CB1-4），其中 N -辛基或 N -甲氧基苯基咔唑连接到2 -氰基丙烯酸酯BODIPY模块通过其2或3位进行设计和合成，用于染料敏化太阳能电池（DSSC）。系统地研究了光物理和电化学性质，并比较了它们在DSSC中作为敏化剂的性能。结构与性质之间的关系表明，供体的电子给体能力和取代位置对这些染料的电子和光伏性能具有重要影响。富电子的 N -甲氧基苯基咔唑作为供体，其2-位取代对DSSCs的效率有积极影响。因此，CB4结合了这些优点，呈现出最宽的波长（300–650 nm）和最强的吸收曲线，并且具有高的消光系数（1.71×10 5 M < small> ？1 cm ？1 ）和最佳光伏性能，短路光电流密度为10.20 mA cm ？2 ，开路电压为600 mV，填充因子为0.7，对应于在AM 1.5辐照下（100 mW cm < small> ？2 ）。

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