Improving efficiency and flexibility of non-halogenated solvent-processed dual-layer organic solar cells through solvent vapor annealing

Zhang，Lin1; Zhang，Jun1; Ma，Yumeng1; Guo，Xueliang1; Huang，Hui5; Bi，Zhaozhao2; Wang，Yilin2; Zhang，Yong4; Xie，Chen5; Luo，Wenchen1; Hu，Xiaotian3; Ma，Wei2; Yuan，Yongbo1

2024-07-01

10.1016/j.orgel.2024.107075

Organic Electronics   影响因子和分区

1566-1199

Dual-layer organic solar cells (OSCs), fabricated through sequential-casting with separately dissolved donor and acceptor materials, offer simplified solution preparation and morphology control. However, the poor solubility of organic materials in non-halogenated solvents often results in undesirable vertical component distribution and insufficient donor/acceptor interfaces in non-halogenated solvent-processed dual-layer OSCs, adversely affecting photovoltaic performance and flexibility. In this study, we applied a solvent vapor annealing (SVA) method using CS solvent in o-xylene solvent-processed dual-layer OSCs. The SVA method effectively adjusted the vertical component distribution of the active layer and increased the donor/acceptor interfaces, leading to an improved power conversion efficiency (PCE) of 17.24 %. Additionally, SVA films exhibited superior tensile properties, with a crack onset strain of 5.07 %, surpassing that of the as-cast films (4.32 %), attributed to the stronger interaction between the donor and acceptor layers with more donor/acceptor interfaces. Consequently, large-area (1 cm) flexible devices achieved a significant efficiency of 14.20 % and maintained excellent mechanical flexibility, with 80 % of the initial efficiency retained after 1000 bending cycles. This work presents an effective approach for fabricating high-performance non-halogenated solvent-processed flexible dual-layer OSCs.

Flexibility Non-halogenated solvent Organic solar cells Solvent vapor annealing Vertical component distribution

SCI ; EI

英语

其他

PHYSICS

2-s2.0-85194317828

Scopus

1.Hunan Key Laboratory for Super Microstructure and Ultrafast Process,School of Physics,Central South University,Changsha,410083,China
2.State Key Laboratory for Mechanical Behavior of Materials,Xi'an Jiaotong University,Xi'an,710049,China
3.Institute of Polymers and Energy Chemistry,College of Chemistry,Nanchang University,Nanchang,330031,China
4.Department of Materials Science and Engineering,and Shenzhen Engineering Research and Development Center for Flexible Solar Cells,Southern University of Science and Technology,Shenzhen,518055,China
5.College of New Materials and New Energies,Shenzhen Technology University,Shenzhen,518118,China

Zhang，Lin,Zhang，Jun,Ma，Yumeng,et al. Improving efficiency and flexibility of non-halogenated solvent-processed dual-layer organic solar cells through solvent vapor annealing[J]. Organic Electronics,2024,130.

Zhang，Lin.,Zhang，Jun.,Ma，Yumeng.,Guo，Xueliang.,Huang，Hui.,...&Yuan，Yongbo.(2024).Improving efficiency and flexibility of non-halogenated solvent-processed dual-layer organic solar cells through solvent vapor annealing.Organic Electronics,130.

Zhang，Lin,et al."Improving efficiency and flexibility of non-halogenated solvent-processed dual-layer organic solar cells through solvent vapor annealing".Organic Electronics 130(2024).