Ferrocene as a highly volatile solid additive in non-fullerene organic solar cells with enhanced photovoltaic performance,Energy & Environmental Science

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Ferrocene as a highly volatile solid additive in non-fullerene organic solar cells with enhanced photovoltaic performance
Energy & Environmental Science ( IF 32.4 ) Pub Date : 2020-10-26 , DOI: 10.1039/d0ee02426k
Linglong Ye _{1,

2,

3,

4,

5} , Yunhao Cai _{1,

2,

3,

4} , Chao Li _{1,

2,

3,

4} , Lei Zhu _{4,

6,

7,

8} , Jinqiu Xu _{4,

6,

7,

8} , Kangkang Weng _{1,

2,

3,

4} , Kangning Zhang _{4,

9,

10,

11} , Miaofei Huang _{12,

13,

14,

15,

16} , Min Zeng _{4,

5,

17,

18} , Tengfei Li _{4,

19,

20,

21,

22} , Erjun Zhou _{4,

16,

23,

24,

25} , Songting Tan _{4,

5,

17,

18} , Xiaotao Hao _{4,

9,

10,

11} , Yuanping Yi _{12,

13,

14,

15,

16} , Feng Liu _{4,

6,

7,

8} , Zhaohui Wang _{4,

26,

27,

28,

29} , Xiaowei Zhan _{4,

19,

20,

21,

22} , Yanming Sun _{1,

2,

3,

4}

Affiliation

School of Chemistry
Beihang University
Beijing 100191
P. R. China
College of Chemistry
School of Chemistry and Chemical Engineering
Shanghai Jiao Tong University
Shanghai 200240
School of Physics State Key Laboratory of Crystal Materials
Shandong University
Jinan 250100
Beijing National Laboratory for Molecular Science
Key Laboratory of Organic Solids
Institute of Chemistry
Chinese Academy of Sciences
Beijing 100190
Xiangtan University
Xiangtan 411105
Department of Materials Science and Engineering
College of Engineering
Peking University
Beijing 100871
CAS Key Laboratory of Nanosystem and Hierarchical Fabrication
CAS Center for Excellence in Nanoscience
National Center for Nanoscience and Technology
Key Laboratory of Organic Optoelectronics and Molecular Engineering
Department of Chemistry
Tsinghua University
Beijing 100084

At present, most of the top-performing organic solar cells (OSCs) are processed with high boiling point solvent additives, which usually have a negative effect on the device stability. To overcome this conundrum, we herein introduce a commercially available organic transition metal compound, ferrocene, as a highly volatile solid additive in OSCs. The utilization of ferrocene led to enhanced power conversion efficiency (PCE) and photostability of PM6:Y6 based OSCs in comparison with the devices processed with a traditional solvent additive. Systematic analysis revealed that the treatment with ferrocene can effectively increase the molecular crystallinity and thus leads to improved charge transport, which accounts for the achieved higher photovoltaic performance in the corresponding OSCs. Moreover, ferrocene was found to exhibit general applicability in five other bulk-heterojunction systems. This work not only demonstrates a cost effective and highly volatile solid additive, but also opens a new possibility toward further improvement of the PCE and stability of OSCs.

中文翻译：

二茂铁作为非富勒烯有机太阳能电池中的高挥发性固体添加剂，具有增强的光伏性能

目前，大多数性能最高的有机太阳能电池（OSC）均使用高沸点溶剂添加剂处理，这通常会对器件的稳定性产生负面影响。为了克服这个难题，我们在本文中引入了市售的有机过渡金属化合物二茂铁，作为OSC中的高挥发性固体添加剂。与使用传统溶剂添加剂处理过的设备相比，二茂铁的利用提高了基于PM6：Y6的OSC的功率转换效率（PCE）和光稳定性。系统分析表明，用二茂铁处理可以有效提高分子的结晶度，从而改善电荷传输，这说明在相应的OSC中实现了更高的光伏性能。此外，发现二茂铁在其他五个本体-异质结系统中也具有普遍适用性。这项工作不仅证明了具有成本效益的高挥发性固体添加剂，而且为进一步改善PCE和OSC的稳定性开辟了新的可能性。

更新日期：2020-11-12

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