Low Boiling-point Solvents Treatment of PEDOT∶PSS Film for Optimized Photovoltaic Cell Performance

LI Wei-guang; CHEN Jun-cong; ZHENG Yan-qiong; CHEN Yu-huan; CHEN Wei-an; LI Xi-feng

doi:10.37188/CJL.20220108

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Low Boiling-point Solvents Treatment of PEDOT∶PSS Film for Optimized Photovoltaic Cell Performance

Luminescence Industry and Technology Frontier | 更新时间：2022-10-19

- Low Boiling-point Solvents Treatment of PEDOT∶PSS Film for Optimized Photovoltaic Cell Performance
  增强出版
- Chinese Journal of Luminescence Vol. 43, Issue 6, Pages: 922-933(2022)
- 作者机构：
  
  1.上海大学材料科学与工程学院，上海　200072
  2.上海大学机电工程与自动化学院新型显示技术及应用集成教育部重点实验室，上海　200072
- 作者简介：
- 基金信息：
  
  发光材料与器件国家重点实验室（华南理工大学）开放基金资助项目
- DOI：10.37188/CJL.20220108
  CLC： O482.31
- Published：05 June 2022，
  
  Received：27 March 2022，
  
  Revised：08 April 2022，
- 稿件说明：
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李维光,陈俊聪,郑燕琼等.低沸点溶剂处理PEDOT∶PSS薄膜提升光伏电池性能[J].发光学报,2022,43(06):922-933.

LI Wei-guang,CHEN Jun-cong,ZHENG Yan-qiong,et al.Low Boiling-point Solvents Treatment of PEDOT∶PSS Film for Optimized Photovoltaic Cell Performance[J].Chinese Journal of Luminescence,2022,43(06):922-933.
李维光,陈俊聪,郑燕琼等.低沸点溶剂处理PEDOT∶PSS薄膜提升光伏电池性能[J].发光学报,2022,43(06):922-933. DOI： 10.37188/CJL.20220108.

LI Wei-guang,CHEN Jun-cong,ZHENG Yan-qiong,et al.Low Boiling-point Solvents Treatment of PEDOT∶PSS Film for Optimized Photovoltaic Cell Performance[J].Chinese Journal of Luminescence,2022,43(06):922-933. DOI： 10.37188/CJL.20220108.

摘要

聚（3，4-乙烯二氧噻吩）∶聚（苯乙烯磺酸盐）（PEDOT∶PSS）作为热门空穴传输材料之一，被广泛应用于各种光电子器件中。为提高其导电性，高沸点溶剂常常被直接添加到PEDOT∶PSS溶液中，然而这同时会造成溶剂残留，给器件带来明显的漏电流。而在以往的报道中，并未见有效利用更易去除的低沸点溶剂。在本工作中，我们发现使用异丙醇、乙醇和丙酮三种低沸点溶剂对PEDOT∶PSS薄膜进行先滴加后旋涂处理后，相应的P3HT∶PC

BM聚合物太阳能电池（PSCs）性能得到了改善。尤其在异丙醇处理后，电池短路电流密度从8.15 mA/cm

提高到9.17 mA/cm

，能量转换效率达到3.5%，相比参比器件提升了18.6%，同时未引起器件的漏电流增加。分析后发现处理后的PEDOT∶PSS薄膜中PEDOT链和PSS链发生相分离，表面形貌发生改变，透光能力和导电性得到增强。同时，通过溶剂处理尤其异丙醇处理后，PEDOT∶PSS的空穴传输能力显著上升。这些结果表明，低沸点溶剂可以通过这种方法被有效地利用，从而改善PEDOT∶PSS薄膜的光电性能。

Abstract

As a popular hole transport material， poly（3，4-ethylenedioxythiophene）∶poly（styrene sulfonate）（PEDOT∶PSS） has been widely used in variety of optoelectronic devices. High boiling-point solvents were usually added into PEDOT∶PSS solutions to enhance its conductivity， but simultaneously resulted in evident leakage current due to solvent residue. However， low boiling-point solvents， which are more easily removed， have not been effectively utilized. In this study， we found that the performance of the corresponding poly（3-hexy-thiophene）（P3HT）∶［6，6］-phenyl-C

-butyric acid methyl ester（PC

BM） polymer solar cells（PSCs） was improved without increasing the leakage current after low boiling-point solvent treatment of PEDOT∶PSS films by dripping isopropanol， ethanol or acetone then spin-coating. Especially， after the isopropanol treatment， the short-circuit current density of PSC increased from 8.15 mA/cm

to 9.17 mA/cm

， and the power conversion efficiency reached 3.5%， an 18.6% enhancement compared to the control device. The analysis revealed that the solvent-treated PEDOT∶PSS films demonstrated diffetent surface morphology， enhanced light transmission， and improved electrical conductivity due to the phase separation between PEDOT and PSS chains. Meanwhile， the hole transport capability of PEDOT∶PSS increased after treatment， especially after the isopropanol treatment. These results suggested that low boiling-point solvents could be effectively utilized by this method and improved the optoelectronic properties of the PEDOT∶PSS film.

关键词

聚（3，4-乙烯二氧噻吩）∶聚（苯乙烯磺酸盐）低沸点溶剂溶剂处理聚合物太阳能电池

Keywords

poly（3，4-ethylenedioxythiophene）∶poly（styrene sulfonate）（PEDOT∶PSS）low boiling-point solventssolvent treatmentpolymer solar cells

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