TY - JOUR
T1 - Efficient Electrical Doping of Organic Semiconductors Via an Orthogonal Liquid-Liquid Contact
AU - Sun, Lulu
AU - Yang, Mengyuan
AU - Dong, Xinyun
AU - Hu, Lu
AU - Hu, Lin
AU - Xie, Cong
AU - Liu, Tiefeng
AU - Qin, Fei
AU - Wang, Wen
AU - Jiang, Youyu
AU - Wu, Mengying
AU - Cao, Wei
AU - Larrain, Felipe A.
AU - Fuentes-Hernandez, Canek
AU - Meng, Ke
AU - Kippelen, Bernard
AU - Müller-Buschbaum, Peter
AU - Zhou, Yinhua
N1 - Funding Information:
The work was supported by the National Natural Science Foundation of China (Grant No. 51973074, 51773072, 61804060), and the HUST Innovation Research Fund (Grant No. 2016JCTD111, 2017KFKJXX012). W.C. acknowledges the financial support from China Scholarship Council (CSC) and P.M.‐B. acknowledges TUM.solar in the context of the Bavarian Collaborative Research Project “Solar Technologies Go Hybrid” (SolTech). The authors would like to thank the Analytical and Testing Center of Huazhong University of Science and Technology for providing the facilities to conduct the characterization. F.A.L., C.F.‐H., and B.K. acknowledge support from the National Nuclear Security Administration award no. DE‐NA0002576 through the Consortium for Nonproliferation Enabling Technologies and by the Department of Energy/National Nuclear Security Administration under Award Number DE‐NA0003921.
Funding Information:
The work was supported by the National Natural Science Foundation of China (Grant No. 51973074, 51773072, 61804060), and the HUST Innovation Research Fund (Grant No. 2016JCTD111, 2017KFKJXX012). W.C. acknowledges the financial support from China Scholarship Council (CSC) and P.M.-B. acknowledges TUM.solar in the context of the Bavarian Collaborative Research Project ?Solar Technologies Go Hybrid? (SolTech). The authors would like to thank the Analytical and Testing Center of Huazhong University of Science and Technology for providing the facilities to conduct the characterization. F.A.L., C.F.-H., and B.K. acknowledge support from the National Nuclear Security Administration award no. DE-NA0002576 through the Consortium for Nonproliferation Enabling Technologies and by the Department of Energy/National Nuclear Security Administration under Award Number DE-NA0003921.
Publisher Copyright:
© 2021 Wiley-VCH GmbH
PY - 2021/3/10
Y1 - 2021/3/10
N2 - Doping is an effective strategy to tune the electrical properties of organic semiconductors. Traditional solution-processed doping methods, including “host-dopant mixing-doping” and “post-fabrication doping” methods, present challenges for their use in applications in optoelectronic devices. This work reports about a novel method to prepare electrically doped films, the authors call orthogonal liquid-liquid-contact (OLLC) doping. In OLLC doping, dopant and polymer semiconductors are dissolved in water and an organic solvent, respectively, and electrical doping occurs during film formation at the orthogonal liquid-liquid (aqueous-organic) interface. A large free volume of polymer and dopant in their solutions enables diffusion for effective doping. Thanks to the high surface tension of water, nanometer-thick polymer films form spontaneously on the aqueous surface and simultaneously get doped. The doped thin polymer films on the aqueous surface can be easily transferred to devices to facilitate hole collection/injection in organic photovoltaics and light-emitting diodes with solution-processed top electrodes.
AB - Doping is an effective strategy to tune the electrical properties of organic semiconductors. Traditional solution-processed doping methods, including “host-dopant mixing-doping” and “post-fabrication doping” methods, present challenges for their use in applications in optoelectronic devices. This work reports about a novel method to prepare electrically doped films, the authors call orthogonal liquid-liquid-contact (OLLC) doping. In OLLC doping, dopant and polymer semiconductors are dissolved in water and an organic solvent, respectively, and electrical doping occurs during film formation at the orthogonal liquid-liquid (aqueous-organic) interface. A large free volume of polymer and dopant in their solutions enables diffusion for effective doping. Thanks to the high surface tension of water, nanometer-thick polymer films form spontaneously on the aqueous surface and simultaneously get doped. The doped thin polymer films on the aqueous surface can be easily transferred to devices to facilitate hole collection/injection in organic photovoltaics and light-emitting diodes with solution-processed top electrodes.
KW - aqueous
KW - doping
KW - light-emitting diodes
KW - liquid-liquid interface
KW - organic semiconductors
KW - photovoltaic devices
KW - solution-processing
UR - http://www.scopus.com/inward/record.url?scp=85100176749&partnerID=8YFLogxK
U2 - 10.1002/adfm.202009660
DO - 10.1002/adfm.202009660
M3 - Article
AN - SCOPUS:85100176749
SN - 1616-301X
VL - 31
JO - Advanced Functional Materials
JF - Advanced Functional Materials
IS - 11
M1 - 2009660
ER -