Efficient Inverted Polymer Solar Cells Based on A Simple Photo-annealing Method

YU Li-jun; HE Xiao-guang; WANG Ning; TIAN Miao-miao

doi:10.3788/fgxb20143511.1349

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Efficient Inverted Polymer Solar Cells Based on A Simple Photo-annealing Method

更新时间：2020-08-12

- Efficient Inverted Polymer Solar Cells Based on A Simple Photo-annealing Method
- Chinese Journal of Luminescence Vol. 35, Issue 11, Pages: 1349-1353(2014)
- 作者机构：
  
  1. 长春师范大学物理学院,吉林长春,130032
  2. 中国科学院长春应用化学研究所高分子物理与化学国家重点实验室,吉林长春,130022
- 作者简介：
- 基金信息：
- DOI：10.3788/fgxb20143511.1349
  CLC： TN383+.1
- Received：21 July 2014，
  
  Revised：30 August 2014，
  
  Published：03 November 2014
- 稿件说明：
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于立军, 贺小光, 王宁等. 基于一种简单的光退火方法的高效倒置型聚合物太阳电池[J]. 发光学报, 2014,35(11): 1349-1353

YU Li-jun, HE Xiao-guang, WANG Ning etc. Efficient Inverted Polymer Solar Cells Based on A Simple Photo-annealing Method[J]. Chinese Journal of Luminescence, 2014,35(11): 1349-1353
于立军, 贺小光, 王宁等. 基于一种简单的光退火方法的高效倒置型聚合物太阳电池[J]. 发光学报, 2014,35(11): 1349-1353 DOI： 10.3788/fgxb20143511.1349.

YU Li-jun, HE Xiao-guang, WANG Ning etc. Efficient Inverted Polymer Solar Cells Based on A Simple Photo-annealing Method[J]. Chinese Journal of Luminescence, 2014,35(11): 1349-1353 DOI： 10.3788/fgxb20143511.1349.

摘要

介绍了一种简单的光退火提高倒置型聚合物太阳电池效率的方法。通过采用易于溶液加工的Cs

作为电子传输层

在光退火15 min之后

器件的光电转换效率达到了8.35%

其中短路电流密度为15.8 mA/cm

开路电压为0.76 V

填充因子为69.5%。该填充因子是目前基于PTB7聚合物太阳电池的最高填充因子。X射线光电子能谱结果显示

在光退火的过程中转变为了Cs

O与CO

。为了验证该机制

采用不同辐照时间的Cs

作为电子传输层

所得到的光伏器件的效率几乎与光退火时相同。此外

通过真空热蒸发Cs

作为电子传输层

也几乎得到了和光退火条件下同样的光电转换效率。上述结论证明光退火是一种非常有效的、简单的提高聚合太阳电池效率的方法。

Abstract

An interesting photo-annealing phenomenon has been successfully demonstrated in polymer solar cells (PSCs) with an inverted device architecture by employing solution processable Cs

as electron extraction layer. As the photo-annealing time attained 15 min

the PSC device harvested a high power conversion efficiency (PCE) of 8.35% with a short-circuit current density of 15.8 mA/cm

an open-circuit voltage of 0.76 V and a fill factor of 69.5%. It is worth mentioning that this fill factor is among the highest values in all reported BHJ devices based on PTB7. X-ray photoelectron spectroscopy results reveal that the photo-annealing phenomenon derived from the transformation of Cs

into Cs

O and CO

during photo irradiation. This evidence was further verified in PSCs by employing four-week-irradiation Cs

solution as electron extraction layer. By using the irradiated Cs

solution

the PSC devices did not show photo-annealing phenomenon and presented almost the same device performance in comparison with those photo-annealing devices. The results indicate that this photo-annealing phenomenon is very meaningful for the realization of future high-performance all-solution processed PSCs.

关键词

Keywords

references

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WANG Ning

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State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences

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