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A new NIR absorbing DPP-based polymer for thick organic solar cells†
Journal of Materials Chemistry C ( IF 6.4 ) Pub Date : 2018-02-05 00:00:00 , DOI: 10.1039/c8tc00113h Gulce Oklem 1, 2, 3 , Xin Song 4, 5, 6 , Levent Toppare 1, 2, 2, 3, 7 , Derya Baran 4, 5, 6 , Gorkem Gunbas 1, 2, 2, 3, 7
Journal of Materials Chemistry C ( IF 6.4 ) Pub Date : 2018-02-05 00:00:00 , DOI: 10.1039/c8tc00113h Gulce Oklem 1, 2, 3 , Xin Song 4, 5, 6 , Levent Toppare 1, 2, 2, 3, 7 , Derya Baran 4, 5, 6 , Gorkem Gunbas 1, 2, 2, 3, 7
Affiliation
Sunlight covers a broad spectrum from ultra-violet to infrared, and low band gap materials are required to utilize the near infrared region (NIR) for better photon harvesting in organic solar cells. It has been shown that copolymers comprising diketopyrrolopyrrole-based acceptors and simple donors (thiophene or furan) achieve an absorption maximum at around 800 nm. In this study, selenophene was coupled with a diketopyrrolopyrrole based acceptor to yield a polymer (PFDPPSe) with an absorption maximum at 830 nm and an absorption onset at 930 nm. The optimized organic solar cells with PFDDPSe:PC71BM active layer blends at 210 nm showed a maximum PCE of 6.16% (average 6.02%) via solvent additive engineering with an inverted device structure. Their charge transport, recombination loss mechanism, and morphology were systematically studied. The results demonstrate that a highly efficient NIR-absorbing polymer can be achieved by the introduction of selenophene and a suitable solvent additive process for NIR organic solar cells. PFDPPSe is also one of the rare examples of a polymer with a PCE of over 6% that does not contain any thiophene-based unit in its backbone.
中文翻译:
一种用于厚有机太阳能电池的新型近红外吸收DPP基聚合物†
阳光涵盖了从紫外线到红外的广泛光谱,并且需要低带隙材料来利用近红外区域(NIR)来更好地收集有机太阳能电池中的光子。已经显示,包含基于二酮吡咯并吡咯的受体和简单的供体(噻吩或呋喃)的共聚物在约800nm处获得最大吸收。在这项研究中,硒烯与基于二酮基吡咯并吡咯的受体偶联,得到的聚合物(PFDPPSe)在830 nm处具有最大吸收,在930 nm处具有起始吸收。在210 nm处具有PFDDPSe:PC 71 BM活性层共混物的优化有机太阳能电池的最大PCE为6.16%(平均6.02%)。具有倒置装置结构的溶剂添加剂工程。对它们的电荷传输,重组损失机理和形态进行了系统的研究。结果表明,通过引入硒烯和适用于NIR有机太阳能电池的合适溶剂添加工艺,可以实现高效的NIR吸收聚合物。PFDPPSe也是PCE超过6%的聚合物的稀有实例之一,其骨架中不包含任何基于噻吩的单元。
更新日期:2018-02-05
中文翻译:
一种用于厚有机太阳能电池的新型近红外吸收DPP基聚合物†
阳光涵盖了从紫外线到红外的广泛光谱,并且需要低带隙材料来利用近红外区域(NIR)来更好地收集有机太阳能电池中的光子。已经显示,包含基于二酮吡咯并吡咯的受体和简单的供体(噻吩或呋喃)的共聚物在约800nm处获得最大吸收。在这项研究中,硒烯与基于二酮基吡咯并吡咯的受体偶联,得到的聚合物(PFDPPSe)在830 nm处具有最大吸收,在930 nm处具有起始吸收。在210 nm处具有PFDDPSe:PC 71 BM活性层共混物的优化有机太阳能电池的最大PCE为6.16%(平均6.02%)。具有倒置装置结构的溶剂添加剂工程。对它们的电荷传输,重组损失机理和形态进行了系统的研究。结果表明,通过引入硒烯和适用于NIR有机太阳能电池的合适溶剂添加工艺,可以实现高效的NIR吸收聚合物。PFDPPSe也是PCE超过6%的聚合物的稀有实例之一,其骨架中不包含任何基于噻吩的单元。