Dicyanovinyl substituted oligothiophenes: Thermal stability, mobility measurements, and performance in photovoltaic devices
Dicyanovinyl substituted oligothiophenes: Thermal stability, mobility measurements, and performance in photovoltaic devices
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DOI：
10.1016/j.solmat.2011.06.022
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发表时间：
2011-12
影响因子：
6.9
通讯作者：
M. Wrackmeyer;M. Hein;A. Petrich;J. Meiss;M. Hummert;M. Riede;K. Leo
中科院分区：
文献类型：
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作者：
M. Wrackmeyer;M. Hein;A. Petrich;J. Meiss;M. Hummert;M. Riede;K. Leo
研究了一系列二氰基乙烯基低聚噻吩的热稳定性、薄膜吸收和空穴迁移率。由于消光系数非常高，这些材料作为太阳能电池的供体应用很有趣。五喹噻吩 DCV2-5T 的空穴迁移率为 2.2×10–5cm2/Vs，用作平面异质结有机小分子太阳能电池中的供体材料。尽管供体层非常薄，仅为 6nm，但这些器件在 15nm C60 平面异质结中表现出高达 2.8% 的效率，填充因子高达 58%，短路电流密度为 5.2mA/cm2，开路电压为 1.03V，绿光光谱范围内的外量子效率为 30%。
A series of dicyanovinyl-oligothiophenes are investigated concerning their thermal stability, absorption in thin film, and hole mobility. Due to very high extinction coefficients, these materials are interesting for application as donor in solar cells. The quinquethiophene DCV2-5T, which shows a hole mobility of 2.2×10–5cm2/Vs, is used as donor material in a flat heterojunction organic small molecule solar cells. Despite a very thin donor layer of only 6nm, these devices exhibit in a planar heterojunction with 15nm C60an efficiency of up to 2.8% with a fill factor of up to 58%, a short circuit current density of 5.2mA/cm2, an open circuit voltage of 1.03V, and an external quantum efficiency of 30% in the green spectral range.