TY - JOUR
T1 - Efficient and Air-Stable Aqueous-Processed Organic Solar Cells and Transistors
T2 - Impact of Water Addition on Processability and Thin-Film Morphologies of Electroactive Materials
AU - Lee, Changyeon
AU - Lee, Hae Rang
AU - Choi, Joonhyeong
AU - Kim, Youngkwon
AU - Nguyen, Thanh Luan
AU - Lee, Wonho
AU - Gautam, Bhoj
AU - Liu, Xiang
AU - Zhang, Kai
AU - Huang, Fei
AU - Oh, Joon Hak
AU - Woo, Han Young
AU - Kim, Bumjoon J.
N1 - Funding Information:
This research was supported by the National Research Foundation Grant (2017M3A7B8065584, 2012M3A6A7055540), funded by the Korean Government. H.Y. Woo is grateful for the financial support from Korea University (KU future research grant).
Publisher Copyright:
© 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
PY - 2018/12/5
Y1 - 2018/12/5
N2 - The authors report the development of a desirable aqueous process for ecofriendly fabrication of efficient and stable organic field-effect transistors (eco-OFETs) and polymer solar cells (eco-PSCs). Intriguingly, the addition of a typical antisolvent, water, to ethanol is found to remarkably enhance the solubility of oligoethylene glycol (OEG) side chain-based electroactive materials (e.g., the highly crystalline conjugated polymer PPDT2FBT-A and the fullerene monoadduct PC61BO12). A water–ethanol cosolvent with a 1:1 molar ratio provides an increased solubility of PPDT2FBT-A from 2.3 to 42.9 mg mL−1 and that of PC61BO12 from 0.3 to 40.5 mg mL−1. Owing to the improved processability, efficient eco-OFETs with a hole mobility of 2.0 × 10−2 cm2 V−1 s−1 and eco-PSCs with a power conversion efficiency of 2.05% are successfully fabricated. In addition, the eco-PSCs fabricated with water–ethanol processing are highly stable under ambient conditions, showing the great potential of this new process for industrial scale application. To better understand the underlying role of water addition, the influence of water addition on the thin-film morphologies and the performance of the eco-OFETs and eco-PSCs are studied. Additionally, it is demonstrated that the application of the aqueous process can be extended to a variety of other OEG-based material systems.
AB - The authors report the development of a desirable aqueous process for ecofriendly fabrication of efficient and stable organic field-effect transistors (eco-OFETs) and polymer solar cells (eco-PSCs). Intriguingly, the addition of a typical antisolvent, water, to ethanol is found to remarkably enhance the solubility of oligoethylene glycol (OEG) side chain-based electroactive materials (e.g., the highly crystalline conjugated polymer PPDT2FBT-A and the fullerene monoadduct PC61BO12). A water–ethanol cosolvent with a 1:1 molar ratio provides an increased solubility of PPDT2FBT-A from 2.3 to 42.9 mg mL−1 and that of PC61BO12 from 0.3 to 40.5 mg mL−1. Owing to the improved processability, efficient eco-OFETs with a hole mobility of 2.0 × 10−2 cm2 V−1 s−1 and eco-PSCs with a power conversion efficiency of 2.05% are successfully fabricated. In addition, the eco-PSCs fabricated with water–ethanol processing are highly stable under ambient conditions, showing the great potential of this new process for industrial scale application. To better understand the underlying role of water addition, the influence of water addition on the thin-film morphologies and the performance of the eco-OFETs and eco-PSCs are studied. Additionally, it is demonstrated that the application of the aqueous process can be extended to a variety of other OEG-based material systems.
KW - ecofriendly solution processing
KW - oligoethylene glycol-based conjugated materials
KW - organic field-effect transistors
KW - polymer solar cells
KW - water–ethanol cosolvent
UR - http://www.scopus.com/inward/record.url?scp=85054919645&partnerID=8YFLogxK
U2 - 10.1002/aenm.201802674
DO - 10.1002/aenm.201802674
M3 - Article
AN - SCOPUS:85054919645
SN - 1614-6832
VL - 8
JO - Advanced Energy Materials
JF - Advanced Energy Materials
IS - 34
M1 - 1802674
ER -
