A three-dimensional thiophene-annulated perylene bisimide as a fullerene-free acceptor for a high performance polymer solar cell with the highest PCE of 8.28% and a VOC over 1.0 V†,Journal of Materials Chemistry C

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A three-dimensional thiophene-annulated perylene bisimide as a fullerene-free acceptor for a high performance polymer solar cell with the highest PCE of 8.28% and a VOC over 1.0 V†
Journal of Materials Chemistry C ( IF 5.7 ) Pub Date : 2018-01-03 00:00:00 , DOI: 10.1039/c7tc05261h
Zhenghui Luo _{1,

2,

3,

4,

5} , Tao Liu _{6,

7,

8,

9,

10} , Wanli Cheng _{1,

2,

3,

4,

5} , Kailong Wu _{1,

2,

3,

4,

5} , Dongjun Xie _{1,

2,

3,

4,

5} , Lijun Huo _{6,

7,

8,

9,

10} , Yanming Sun _{6,

7,

8,

9,

10} , Chuluo Yang _{1,

2,

3,

4,

5}

Affiliation

A new propeller-shaped small-molecule acceptor of BPT-S with S-annulated perylene bisimide (PBI) as peripheral groups was designed and synthesized. Compared to the unannulated counterpart (BPT), BPT-S exhibits a blue-shift absorption spectrum, stronger absorption in the region of 400–510 nm, higher LUMO energy level and twisted molecular geometry. The BPT-S-based device with PDBT-T1 as the donor achieved a power conversion efficiency (PCE) as high as 8.28% with an impressively high open-circuit voltage (V_OC) of 1.02 V, a near 16% enhancement in PCE with respect to the BPT-based control device (7.16%). The high photovoltaic performance for the BPT-S-based device can be attributed to its relatively high-lying LUMO level, complementary absorption spectra with the donor material, favorable morphology and balanced carrier transport. To the best of our knowledge, a PCE of 8.28% is the highest value for the device based on S-annulated PBIs as acceptors reported so far. This work indicates the great potential of the 3D S-annulated PBI-based acceptors for tandem (or multi-junction) organic solar cells due to the proper absorption spectra and high photovoltaic performance.

中文翻译：

三维噻吩环化的bi双酰亚胺作为高性能聚合物太阳能电池的无富勒烯受体，具有最高PCE为8.28％和V _OC超过1.0 V †

设计并合成了一种新的螺旋桨状小分子受体BPT-S，该受体以S-环per双酰亚胺（PBI）为外围基团。与未成环的对应物（BPT）相比，BPT-S表现出蓝移吸收光谱，在400-510 nm范围内的吸收更强，更高的LUMO能级和扭曲的分子几何形状。的BPT-S为基础的设备与PDBT-T1作为施主实现了功率转换效率（PCE）高达8.28％，其具有令人印象深刻的高开路电压（V _OC 1.02的V），在PCE的近16％的增强相对于基于BPT的控制设备（7.16％）。高光伏性能基于BPT-S的设备可归因于其相对较高的LUMO水平，与施主材料互补的吸收光谱，良好的形貌和平衡的载流子传输。据我们所知，到目前为止，接受者报告，基于S环化的PBI的设备的PCE值为8.28％。这项工作表明，由于具有适当的吸收光谱和较高的光伏性能，基于3DS的PBI基受体在串联（或多结）有机太阳能电池中具有巨大的潜力。

更新日期：2018-01-03

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