Park Na Yeon, Jeong Gwan Seung, Yu Young-Jin, Jung Yoon-Chae, Lee Jin Hee, Seo Jung Hwa, Choi Jea-Young
Department of Metallurgical Engineering, Dong-A University, Busan 604-714, Korea.
Department of Chemical Engineering, Dong-A University, Busan 604-714, Korea.
Polymers (Basel). 2022 Jan 25;14(3):478. doi: 10.3390/polym14030478.
In the last decades, the conductive polymer PEDOT:PSS has been introduced in Si-based hybrid solar cells, gaining noticeable research interest and being considered a promising candidate for next generation solar cells which can achieve both of low manufacturing cost and high power conversion efficiency. This study succeeded in improving the electrical conductivity of PEDOT:PSS to 937 S/cm through a simple process of adding hydroquinone (HQ) to the pristine PEDOT:PSS solution. The results also showed that the addition of HQ to PEDOT:PSS(HQ-PEDOT:PSS) could not only dramatically improve the conductivity but also well-sustain the work function characteristics of PEDOT:PSS by promoting the formation of more continuous conductive-PEDOT channels without removing the insulating PSS. In this report, we reveal that the application of the HQ-PEDOT:PSS to the Si/PEDOT:PSS HSC could significantly improve the short-circuit current and open-circuit voltage characteristics to increase the power conversion efficiency of the HSCs compared to the conventional approaches. Moreover, we also treated the Si surface with the organic monomer, benzoquinone (BQ) to (1) passivate the excess Si surface defect states and (2) to improve the properties of the Si/PEDOT:PSS interface. We show that BQ treatment is able to dramatically increase the minority carrier lifetime induced by effective chemical and field-effect passivation in addition to enhancing the wettability of the Si surface with the PEDOT:PSS solution. As a result, the power conversion efficiency was increased by 10.6% by introducing HQ and BQ into the fabrication process of the Si/PEDOT:PSS HSC.
在过去几十年中，导电聚合物聚（3,4-乙撑二氧噻吩）：聚苯乙烯磺酸盐（PEDOT:PSS）已被引入硅基混合太阳能电池中，引起了显著的研究兴趣，并被认为是下一代太阳能电池的有前途的候选材料，这类电池能够实现低成本制造和高功率转换效率。本研究通过向原始PEDOT:PSS溶液中添加对苯二酚（HQ）这一简单过程，成功将PEDOT:PSS的电导率提高到了937 S/cm。结果还表明，向PEDOT:PSS中添加HQ（HQ-PEDOT:PSS）不仅能显著提高电导率，还能通过促进形成更多连续的导电PEDOT通道而很好地维持PEDOT:PSS的功函数特性，同时不除去绝缘的PSS。在本报告中，我们揭示了将HQ-PEDOT:PSS应用于硅/PEDOT:PSS混合太阳能电池（HSC）与传统方法相比，能显著改善短路电流和开路电压特性，从而提高HSC的功率转换效率。此外，我们还用有机单体苯醌（BQ）处理硅表面，以（1）钝化多余的硅表面缺陷态，以及（2）改善硅/PEDOT:PSS界面的性能。我们表明，BQ处理除了能增强硅表面与PEDOT:PSS溶液的润湿性外，还能通过有效的化学和场效应钝化显著提高少数载流子寿命。结果，通过将HQ和BQ引入硅/PEDOT:PSS HSC的制造过程，功率转换效率提高了10.6%。
