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| Type |
Symposium |
| Area |
Polymer Development for Energy & Environment |
| Room No. |
Room 403 |
| Time |
FRI 15:00-15:30 |
| Code |
POLY3-2 |
| Subject |
Highly Efficient, Photostable Ternary Organic Solar Cells Using Narrow Bandgap
Nonfullerene Acceptor and Fullerene Additive
|
| Authors |
Kwanghee Lee
Department of Materials Science and Engineering, Gwangju Institute of Science and Technology, Korea |
| Abstract |
Recent breakthroughs in the molecular design and the device engineering in the field of nonfullerene accepter (NFA)-based organic solar cells (OSCs) have made remarkable achievement with high power conversion efficiencies (PCEs) over 17%. However, despite such promising advances, an inferior stability of OSCs under operational conditions (e.g., light and heat) is a prominent challenge that must be overcome for their practical commercialization.
Recently, a ternary blend concept has been suggested to be an efficient way to simultaneously enhance the PCE and the stability of OSCs. Here, by introducing small amount of fullerene into narrow bandgap NFA-based bulk heterojunction nanocomposites, we developed efficient and photostable ternary photoactive systems, leading to the enhanced PCE of 13% and the prolonged lifetime that retained about 80% of their initial PCEs after 500 hr operation under continuous illumination, whereas binary counterparts underwent rapid degradation. It appears that the fullerene additive provides an excellent compatibility for efficient electron transfer and balanced charge transport with suppressed recombination.
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| E-mail |
klee@gist.ac.kr |
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123rd General Meeting of the KCS