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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：
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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,61,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,2,提高到9.17 mA/cm,2,，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,61,-butyric acid methyl ester（PC,61,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,2, to 9.17 mA/cm,2,， 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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