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论文类型：期刊论文

发表时间：2013-12-01

发表刊物：ADVANCED ENERGY MATERIALS

收录刊物：SCIE、EI、Scopus

卷号：3

期号：12

页面范围：1647-1656

ISSN号：1614-6832

关键字：synthesis; organic dyes; solar cells; dye-sensitized solar cells

摘要：A series of four new dyes, based on the D35 type donor moiety with varied linker units, is synthesized using a facile convergent/divergent method, enabled by an improved synthesis of the D35 donor. The dyes are evaluated in dye sensitized solar cells with Co(II/III)(bpy)(3)-based electrolytes. By extending the linker fragment, higher photocurrents and solar energy conversion efficiencies are achieved. It is also found that the linker unit plays a crucial role in maintaining a high open-circuit photovoltage. Based on the photovoltaic performance it is concluded that the hexylthiophene unit is the most suitable for this purpose, as it allows further enhancement of the already high open-circuit voltage of D35 to 0.92 V. The best dye in this series reaches an efficiency of 6.8%.