高等学校化学学报 ›› 2023, Vol. 44 ›› Issue (9): 20230151.doi: 10.7503/cjcu20230151

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挥发固体添加剂调控有机太阳能电池性能的研究进展

宋欣1,2(), 高申正1, 许善磊1, 徐浩1, 周鑫杰1, 朱梦冰1, 郝儒林1, 朱卫国1()   

  1. 1.常州大学材料科学与工程学院, 江苏省光电热能量转换材料与应用工程中心, 常州 213164
    2.南开大学化学学院, 先进能源材料化学教育部重点实验室, 天津 300071
  • 收稿日期:2023-03-30 出版日期:2023-09-10 发布日期:2023-05-18
  • 通讯作者: 宋欣,朱卫国 E-mail:xin.song@cczu.edu.cn;zwg18@126.com
  • 基金资助:
    国家自然科学基金(62105129);江苏省自然科学基金(青年基金)(BK20200591)

Progress on the Efficiency Regulation of Organic Solar Cells by Volatile Solid Additives

SONG Xin1,2(), GAO Shenzheng1, XU Shanlei1, XU Hao1, ZHOU Xinjie1, ZHU Mengbing1, HAO Rulin1, ZHU Weiguo1()   

  1. 1.School of Materials Science and Engineering,Jiangsu Engineering Laboratory of Light?Electricity?Heat Energy?Converting Materials and Applications,Changzhou University,Changzhou 213164,China
    2.Key Laboratory of Advanced Energy Materials Chemistry,Ministry of Education,College of Chemistry,Nankai University,Tianjin 300071,China
  • Received:2023-03-30 Online:2023-09-10 Published:2023-05-18
  • Contact: SONG Xin, ZHU Weiguo E-mail:xin.song@cczu.edu.cn;zwg18@126.com
  • Supported by:
    the National Natural Science Foundation of China(62105129);the Natural Science Foundation of Jiangsu Province, China(BK20200591)

摘要:

本体异质结(BHJ)有机太阳能电池(OSC)因具有可溶液制备、 绿色无毒及可柔性化等特点而被视为具有广阔应用前景的太阳能电池技术之一. 活性层内部的纳米形貌是决定器件性能和工作稳定性的关键因素之一. 基于此, 研究者先后开发了热退火、 溶剂退火和溶剂添加剂等形貌优化方法. 然而, 上述处理方式不能与大面积印刷工艺兼容, 而且不利于器件内部形貌和性能的稳定性, 因此寻找简单高效的形貌调控手段是OSC研究的热点. 近年来, 挥发固体添加剂因其独特的分子特性, 能够与给受体分子间形成较强的相互作用力, 被认为是提升OSC能量转换效率(PCE)和稳定性的发展方向. 本文系统总结了非卤素及卤素型挥发固体添加剂调控OSC形貌和光伏性能的研究现状, 深入讨论了挥发固体添加剂优化活性层形貌的不同机理, 包括分子间吸附能、 给体与受体的相互作用、 晶体成核和生长等; 分析了挥发固体添加剂策略所面临的挑战和未来的发展趋势.

关键词: 有机太阳能电池, 挥发固体添加剂, 非富勒烯受体, 器件性能, 分子间相互作用力

Abstract:

Bulk heterojunction(BHJ) organic solar cells(OSCs) are considered a promising photovoltaic technology due to their solution-processability, eco-friendliness, non-toxicity, and flexibility. The nanoscale morphology of the active layer is a key factor that determines device performance and stability. Researchers have developed various morphology optimization methods, such as thermal annealing, solvent annealing, and solvent additives. However, these treatment methods are incompatible with large-area printing processes and may compromise the internal morphology and device performance stability. Consequently, it is essential to screen a simple yet efficient approach for morphology control in OSC area. In recent years, volatile solid additives have emerged as a feasible direction to improve the energy conversion efficiency(PCE) and stability of OSCs due to their unique molecular properties, which can form strong interaction forces with donor/acceptor molecules. This article systematically summarized the research status of non-halogenated and halogenated volatile solid additives in regulating the morphology and photovoltaic performance of OSCs. We deeply discussed the different mechanisms of optimizing active layer morphology by volatile solid additives, including molecular adsorption energy, interaction between donor and acceptor, crystal nucleation, and growth. Finally, this article analyzed the challenges and future development trends of volatile solid additive.

Key words: Organic solar cell, Volatile solid additive, Non-fullerene acceptor, Photovoltaic performance, Intermolecular interaction

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