Abstract
Suitable work function (WF) of the cathode in polymer solar cells (PSCs) is of essential importance for the efficient electron extraction and collection to boost the power conversion efficiency. Herein, we report a facile and efficient method to tune the surface WF of aluminum-doped zinc oxide (AZO) through building of a definite interfacial dipole, which is realized by the construction of a layered structure of positive and negative ionized species. A cross-linked perylene bisimide (poly-PBI) thin film is deposited onto the AZO surface first, and then it is reduced to the radical anion state (poly-PBI•-) in an electrochemical cell, using tetraoctylammonium (TOA+), a bulky cation, as a counter ion. Owing to the huge volume of TOA+, it is absorbed on the surface of the cross-linked PBI•- thin film through Coulomb force, and thus a definite interface dipole is formed between the two ionized layers. Because of the definite interface dipole, the surface WF of the electrode modified with ionized layers is decreased dramatically to 3.9 eV, which is much lower than that of the electrode modified with the neutral PBI layer (4.5 eV). By using this novel cathode interlayer with a definite interface dipole in PSCs, a significantly increas...Continue Reading
References
May 1, 2007·Journal of the American Chemical Society·Yanke CheLing Zang
Sep 10, 2011·Advanced Materials·Zhicai HeYong Cao
Nov 9, 2011·ACS Applied Materials & Interfaces·Alexander W HainsBrian A Gregg
Apr 21, 2012·Science·Yinhua ZhouBernard Kippelen
May 4, 2012·Advanced Materials·Hongkyu KangKwanghee Lee
Sep 15, 2012·Advanced Materials·Cheng GuYuguang Ma
Mar 2, 2013·Advanced Materials·Aung Ko Ko KyawAlan J Heeger
Sep 3, 2013·Chemical Society Reviews·Chunhui DuanYong Cao
Oct 12, 2013·Advanced Materials·Bo Ram LeeMyoung Hoon Song
Aug 6, 2014·Advanced Materials·Chang-Zhi LiAlex K-Y Jen
Nov 14, 2014·Angewandte Chemie·David SchmidtFrank Würthner
May 29, 2015·Journal of the American Chemical Society·Li NianYuguang Ma
Sep 12, 2015·ACS Applied Materials & Interfaces·Wenwen DengHanxi Yang
Nov 10, 2015·ACS Applied Materials & Interfaces·Li NianYuguang Ma
Sep 30, 2016·ACS Applied Materials & Interfaces·Rong WangYuguang Ma
Nov 4, 2016·Chemical Communications : Chem Comm·Weitao MaYuguang Ma
Citations
Apr 9, 2020·Materials·Ying WangWei Li
Jan 30, 2020·Advanced Science·Chiao-Wei TsengZhen Zhang
Feb 6, 2020·ACS Applied Materials & Interfaces·Renheng BoAntonio Tricoli