Efficient Tandem and Triple-Junction Polymer Solar Cells
摘要:
We demonstrate tandem and triple-junction polymer solar cells with power conversion efficiencies of 8.9% and 9.6% that use a newly designed, high molecular weight, small band gap semiconducting polymer and a matching wide band gap polymer.
Efficient Tandem and Triple-Junction Polymer Solar Cells
摘要:
We demonstrate tandem and triple-junction polymer solar cells with power conversion efficiencies of 8.9% and 9.6% that use a newly designed, high molecular weight, small band gap semiconducting polymer and a matching wide band gap polymer.
Enhancing the photovoltaic performance of binary acceptor-based conjugated polymers incorporating methyl units
作者:Guitao Feng、Yunhua Xu、Yang Wu、Cheng Li、Fan Yang、Yaping Yu、Wei Ma、Weiwei Li
DOI:10.1039/c6ra17986j
日期:——
field-effect transistors. Non-methylated polymers as electron donors in solarcells show an efficiency of 4.2% with a relatively low short circuit current density (Jsc) of 8.3 mA cm−2, while methylated polymers exhibit dramastically enhanced Jsc of 12.8 mA cm−2 and PCEs up to 6.1%. Micro-phase separation in bulk-heterojunction thinfilms were systematically investigated, in which methylated polymers in blended
设计并合成了将五环内酰胺(PCL)和二酮吡咯并吡咯(DPP)单元结合到共轭聚合物中的三种共轭聚合物,其中PCL和DPP之间的芳族连接基从噻吩到甲基噻吩。与未甲基化的聚合物相比,发现甲基化的聚合物显示出轻微的蓝移吸收和较高的能级。在场效应晶体管中,这三种聚合物还表现出良好的结晶特性和高达0.57 cm 2 V -1 s -1的空穴迁移率。在太阳能电池中用作电子供体的非甲基化聚合物的效率为4.2%,而短路电流密度(J sc)为8.3 mA cm -2相对较低,而甲基化聚合物的J sc显着提高,为12.8 mA cm -2,PCE高达6.1%。系统地研究了体-异质结薄膜中的微相分离,发现混合薄膜中的甲基化聚合物可在较小的晶畴范围内提供更好的微相分离。观察结果可以解释它们在太阳能电池中改善的光电流。我们的研究表明,通过有意进行结构修饰,包含多个缺电子单元的共轭聚合物在高性能太阳能电池中具有巨大的潜在应用前景。
Effect of donor units in methylated DPP-based polymers on performance of organic field-effect transistors
作者:Hee Su Kim、Dang Long、Yong-Young Noh、Do-Hoon Hwang
DOI:10.1039/c8tc02319k
日期:——
We synthesized methylated DPP based polymers and studied the donor moiety effect on transistor properties. Our results show that their charge polarity can be tuned from ambipolar to unipolar p-type transport via the appropriate modulating donor counter units.
Diketopyrrolopyrrole polymers as organic semiconductors
申请人:BASF SE
公开号:US10424737B2
公开(公告)日:2019-09-24
The present invention relates to polymers comprising a repeating unit of the formula (I) and their use as organic semiconductor in organic devices, especially a diode, an organic field effect transistor and/or a solar cell, or a device containing a diode and/or an organic field effect transistor, and/or a solar cell. The polymers according to the invention have excellent solubility in organic solvents and excellent film-forming properties. In addition, high efficiency of energy conversion, excellent field-effect mobility, good on/off current ratios and/or excellent stability can be observed, when the polymers according to the invention are used in semiconductor devices or organic photovoltaic (PV) devices (solar cells).