Volatilizable and cost-effective quinone-based solid additives for improving photovoltaic performance and morphological stability in non-fullerene polymer solar cells,Journal of Materials Chemistry A

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Volatilizable and cost-effective quinone-based solid additives for improving photovoltaic performance and morphological stability in non-fullerene polymer solar cells
Journal of Materials Chemistry A ( IF 10.7 ) Pub Date : 2020-06-12 , DOI: 10.1039/d0ta04941g
Youdi Zhang _{1,

2,

3,

4,

5} , Yongjoon Cho _{1,

2,

3,

4,

5} , Jungho Lee _{1,

2,

3,

4,

5} , Jiyeon Oh _{1,

2,

3,

4,

5} , So-Huei Kang _{1,

2,

3,

4,

5} , Sang Myeon Lee _{1,

2,

3,

4,

5} , Byongkyu Lee _{1,

2,

3,

4,

5} , Lian Zhong _{1,

2,

3,

4,

5} , Bin Huang _{1,

2,

3,

4,

5} , Seungjin Lee _{6,

7,

8,

9} , Jin-Woo Lee _{6,

7,

8,

9} , Bumjoon J. Kim _{6,

7,

8,

9} , Yongfang Li _{10,

11,

12,

13,

14} , Changduk Yang _{1,

2,

3,

4,

5}

Affiliation

Controlling the morphological stability of non-fullerene polymer solar cells (NF-PSCs) is a critical process for improving photovoltaic performances. In many systems, liquid additives have been widely used to produce favorable morphological features; however, liquid additives frequently leave residues after thermal treatment owing to their high boiling points, which has detrimental effects on the reproducibility of NF-PSCs. In this study, commercially available and volatilizable solid additives, 9,10-anthracenedione (BDT-1) and benzo[1,2-b:4,5-b′]dithiophene-4,8-dione (BDT-2), are selected to coordinate the molecular arrangement to enhance absorption intensity, charge transfer, and molecular crystallinity. Suppressed bimolecular recombination and a favorable balance between the domain size and relative domain purity were observed with the introduction of both solid additives, which improved the photovoltaic parameters of NF-PSCs. PM6:TPT10-based devices with BDT-1 and BDT-2 additives achieved the best power conversion efficiencies (PCEs) of 16.26% and 15.18%, respectively, which were better than the 13.55% achieved with a 1,8-diiodooctane (DIO) additive. Other NF-PSC systems of PBDB-T:TPT10 and PTQ10:TPT10 blends also showed that the photovoltaic performance with the solid additives is superior to that with liquid additives. These results imply that the use of solid additives is a promising strategy to improve the PCEs of NF-PSCs.

中文翻译：

可挥发且经济高效的醌类固体添加剂，可改善非富勒烯聚合物太阳能电池的光伏性能和形态稳定性

控制非富勒烯聚合物太阳能电池（NF-PSC）的形态稳定性是提高光伏性能的关键过程。在许多系统中，液体添加剂已被广泛用于产生良好的形态特征。但是，液态添加剂由于其高沸点而经常在热处理后留下残留物，这对NF-PSC的再现性具有不利影响。在这项研究中，市售可挥发的固体添加剂9,10-蒽二酮（BDT-1）和苯并[1,2- b：4,5- b选择']二噻吩-4,8-二酮（BDT-2）来协调分子排列，以增强吸收强度，电荷转移和分子结晶度。通过引入两种固体添加剂，观察到抑制的双分子重组以及在畴尺寸和相对畴纯度之间的良好平衡，这改善了NF-PSC的光伏参数。带有BDT-1和BDT-2添加剂的基于PM6：TPT10的设备分别实现了16.26％和15.18％的最佳功率转换效率（PCE），优于1,8-二碘辛烷（DIO）达到的13.55％）添加剂。PBDB-T：TPT10和PTQ10：TPT10共混物的其他NF-PSC系统还显示，使用固体添加剂的光伏性能优于使用液体添加剂的光伏性能。

更新日期：2020-07-07

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