High-performance All Polymer Solar Cells Fabricated with Non-halogenated Solvent

Wen-tao Xiong; Yi-kun Guo; Da-hui Zhao; Yan-ming Sun

doi:10.11777/j.issn1000-3304.2018.17267

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High-performance All Polymer Solar Cells Fabricated with Non-halogenated Solvent

Research Article | 更新时间：2021-01-26

- High-performance All Polymer Solar Cells Fabricated with Non-halogenated Solvent
- Acta Polymerica Sinica Issue 2, Pages: 315-320(2018)
- 作者机构：
  
  1.北京航空航天大学化学学院北京 100191
  2.北京大学化学学院北京 100871
- 作者简介：
- 基金信息：
- DOI：10.11777/j.issn1000-3304.2018.17267
  CLC：
- Published：20 February 2018，
  
  Received：14 September 2017，
  
  Revised：18 October 2017，
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Wen-tao Xiong, Yi-kun Guo, Da-hui Zhao, Yan-ming Sun. High-performance All Polymer Solar Cells Fabricated with Non-halogenated Solvent. [J]. Acta Polymerica Sinica (2):315-320(2018)
DOI：

Wen-tao Xiong, Yi-kun Guo, Da-hui Zhao, Yan-ming Sun. High-performance All Polymer Solar Cells Fabricated with Non-halogenated Solvent. [J]. Acta Polymerica Sinica (2):315-320(2018) DOI： 10.11777/j.issn1000-3304.2018.17267.

摘要

以聚合物PTB7-Th为给体、聚合物PDI-V为受体和四氢呋喃为溶剂，构筑了全聚合物太阳能电池.PTB7-Th与PDI-V光谱互补，有效地拓宽了活性层在可见光区的吸收范围，这有利于提高光电流.在器件优化过程中，发现热退火的方法可以有效地提高器件的光伏性能.尽管热退火处理对器件的开路电压影响不大，但是可以一定程度上提高器件的短路电流和填充因子，从而将电池的效率从7.1%提高到8.1%.8.1%的效率也是目前采用非卤素溶剂加工的基于苝酰亚胺类聚合物受体电池效率的最高值.该实验结果表明，四氢呋喃作为一种低毒性的有机非卤素溶剂，可以用来制备高性能有机光伏器件.

Abstract

Despite the rapid progress that has been made in increasing the power conversion efficiency (PCE) of organic solar cells (OSCs) over the past decade

it is a challenge to realize efficient and environment-friendly OSCs. In this contribution

all polymer solar cells were fabricated with a blend of poly[4

8-bis(5-(2-ethylhexyl)thiophen-2-yl)benzo[1

2-b:4

5-b']dithiophene-co-3-fluorothieno[3

4-b]

thiophene-2-carboxylate] (PTB7-Th) donor and vinylene-bridged perylenediimide-based polymer (PDI-V) acceptor

in which non-halogenated tetrahydrofuran (THF) was used as the host solvent. A conventional device structure of ITO/poly(3

4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS)/PTB7-Th:PDI-V/zirconium acetylacetonate (ZrAcac)/Al was employed

where PEDOT:PSS functioned as the hole transporting layer (HTL) and ZrAcac functioned as the electron transporting layer (ETL). The mixed solution of PTB7-Th and PDI-V was spin cast on the top of PEDOT:PSS layer to form the active layer. After that

ZrAcac solution was spin cast on the top of PTB7-Th:PDI-V layer. Different thermal annealing temperatures were used to optimize the active layer morphology. In details

OSCs without thermal annealing showed a PCE of 7.1%

with a short-circuit current (

) of 14.9 mA/cm

an open-circuit voltage (

) of 0.74 V

and a fill factor (FF) of 64%. The devices annealed at 120℃ showed a high PCE of 8.1% with a

of 15.5 mA/cm

of 0.74 V

and a FF of 70%. Further increasing the annealing temperature to 150℃ led to decreased FF and thereby a relatively lower PCE (7.4%). To the best of our knowledge

the PCE of~8.1% is one of the highest PCE values reported in the literature so far for all polymer solar cells. The high and balanced hole and electron mobility partially contributed to such a high performance. These results suggest that THF as good non-halogenated solvent can be used to fabricate high-performance all polymer solar cells. Higher efficiency can be achieved for OSCs with THF solvent when better polymer acceptors are employed.

关键词

有机半导体太阳能电池聚合物受体非卤素溶剂效率

Keywords

Organic solar cellsPolymer acceptorNon-halogenated solventPower conversion efficiency

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