Journal
NANO ENERGY
Volume 84, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.nanoen.2021.105862
Keywords
Organic solar cells; Non-fullerene acceptor; Additive; Eutectic phase
Categories
Funding
- National Natural Science Foundation of China [21801238, 61504015, 51961165102]
- National Youth Thousand Program Project [R52A199Z11]
- CAS Pioneer Hundred Talents Program B [Y92A010Q10]
- National Special Funds for Repairing and Purchasing Scientific Institutions [Y72Z090Q10]
- Natural Science Foundation of Chongqing [cstc2017jcyjA0752, cstc2018jcyjAX0556, cstc2017jcyjAX0384, cstc2018jszx-cyzdX0137]
- Key Laboratory of Low-grade Energy Utilization Technologies and Systems [LLEUTS-2017004, LLEUTS-2019001]
- Venture & Innovation Support Program for Chongqing Overseas Returnees [cx2017034, cx2019028]
- Chongqing Talents Top Youth Talent Program [CQYC201905057]
- Research Grants Council of Hong Kong [C5037-18G]
Ask authors/readers for more resources
Introducing a solid additive, 1,4-diiodobenzene (DIB), can enhance the active layer structure of organic solar cells (OSC) and improve performance.
DIB treated OSCs exhibit tighter molecular stacking and more ordered molecular arrangement, leading to increased power conversion efficiency.
In addition to performance enhancement, DIB treatment also improves device stability and is versatile for various types of OSCs.
Introducing a small amount of high boiling point solvent additive has been widely regarded as a feasible method to optimize the active layer morphology of organic solar cells (OSCs). However, current additives are initially developed for fullerene based OSCs and the development of additive engineering is lagging behind the development of non-fullerene acceptor based OSCs. Here, a simple and versatile solid additive, 1,4-diiodobenzene (DIB), is introduced to the non-fullerene OSCs. Due to the formation of a eutectic phase between the additive and the non-fullerene acceptor, a desired microstructure with tighter molecular stacking and more ordered molecular arrangement is achieved. As a result, DIB treated OSCs display significantly enhanced performance with a power conversion efficiency (PCE) of 17.72% for ternary device, 17.36% for binary device and 15.03% for thick-film (300 nm) device. Additional advantages of the DIB treatment include excellent device stability, toleration of a wide additive concentration range, and versatility in both polymer and small molecule OSCs. The results highlight the importance of additive engineering in high-performance OSCs and demonstrate the significance of supramolecular interactions.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available