Efficient as-cast thick film small-molecule organic solar cell with less fluorination on the donor,Materials Chemistry Frontiers

当前位置： X-MOL 学术 › Mater. Chem. Front. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Efficient as-cast thick film small-molecule organic solar cell with less fluorination on the donor
Materials Chemistry Frontiers ( IF 6.0 ) Pub Date : 2019-11-14 , DOI: 10.1039/c9qm00605b
Kai Wang _{1,

2,

3,

4,

5} , Xin Song _{6,

7,

8,

9,

10} , Xiao Guo _{1,

2,

3,

4,

5} , Yunhao Wang _{1,

2,

3,

4,

5} , Xue Lai _{1,

2,

3,

4,

5} , Fei Meng _{1,

2,

3,

4,

5} , Mengzhen Du _{1,

2,

3,

4,

5} , Dongyu Fan _{1,

2,

3,

4,

5} , Ren Zhang _{1,

2,

3,

4,

5} , Gongqiang Li _{1,

2,

3,

4,

5} , Aung Ko Ko Kyaw _{5,

11,

12,

13,

14} , Jianpu Wang _{1,

2,

3,

4,

5} , Wei Huang _{1,

2,

3,

4,

5} , Derya Baran _{6,

7,

8,

9,

10}

Affiliation

Key Laboratory of Flexible Electronic (KLOFE) & Institute of Advanced Materials (IAM)
Jiangsu National Synergistic Innovation Center for Advanced Materials (SICAM)
Nanjing Tech University (NanjingTech)
Nanjing 211816
P. R. China
King Abdullah University of Science and Technology (KAUST)
KAUST Solar Center (KSC)
Physical Sciences and Engineering Division (PSE)
Thuwal
Saudi Arabia
Guangdong University Key Laboratory for Advanced Quantum Dot Displays and Lighting
Shenzhen Key Laboratory for Advanced Quantum Dot Displays and Lighting, and Department of Electrical & Electronic Engineering
Southern University of Science and Technology
Shenzhen 518055

Herein, two donor materials based on fluorine substituted isatin units (DI3T-1F, DI3T-2F) were designed and synthesized for thick-film small molecule solar cells. The devices based on DI3T-1F demonstrate balanced charge transport and less trap-assisted recombination, leading to higher power conversion efficiency (PCE) of 8.33% with a thickness ca. 150 nm compared to DI3F-2F (PCE of 7.32% with thick film at ca. 160 nm) without additives, solvent or thermal annealing treatments. More interestingly, the device based on DI3T-1F small molecules demonstrates good tolerance to active layer thickness from 150 to 300 nm with device performance over 5%. Our results indicate that less fluorine atoms on the donor units can optimize the charge transport, and phase-segregated morphology in small molecule solar cells without the need for post-treatment.

中文翻译：

高效的铸态厚膜小分子有机太阳能电池，施主上的氟化较少

在此，设计并合成了两种基于氟取代的靛红单元的供体材料（DI3T-1F，DI3T-2F）用于厚膜小分子太阳能电池。基于DI3T-1F的器件表现出平衡的电荷传输和较少的陷阱辅助重组，从而在厚度约为7.5mm的情况下实现了8.33％的更高功率转换效率（PCE）。与DI3F-2F相比为150 nm（PCE为7.32％，在约160 nm处具有厚膜），无需添加添加剂，溶剂或进行热退火处理。更有趣的是，基于DI3T-1F的设备小分子对150至300 nm的有源层厚度表现出良好的耐受性，器件性能超过5％。我们的结果表明，供体单元上的氟原子较少，可以优化小分子太阳能电池中的电荷传输和相分离形态，而无需进行后处理。

更新日期：2019-11-14

点击分享查看原文

点击收藏

阅读更多本刊最新论文