A dual ternary system for highly efficient ITO-free inverted polymer solar cells
Journal article, 2015

In this study, it has been found that a very fine nanostructure can be realized by mixing 1-chloronaphthalene (CN) - a high-boiling solvent - into a binary chlorobenzene (CB) : 1,8-diiodooctane (DIO) solvent mixture to form a ternary solvent system. An improvement in energy level alignment is also obtained by doping ICBA into a binary PTB7 : PCBM[70] blend, whereby the ternary solute system provides a new pathway for charge transfer from PTB7 to the PCBM[70] : ICBA alloy. This is confirmed by imaging the surface morphology of the active layer using AFM and TEM, monitoring the transient film formation process and measuring the charge transfer states with Fourier transform photocurrent spectroscopy. An encouraging PCE of 7.65% is achieved from the dual ternary system, which is the highest value ever reported for an ITO-free inverted polymer solar cell with a PEDOT:PSS layer as the top semitransparent electrode - a system which is compatible with low-cost large-area roll-to-roll manufacturing.

Author

Zuosheng Peng

Jinan University

Y. X. Xia

Linköping University

Jinan University

F. Gao

Linköping University

South China University of Technology

K. Xiong

Jinan University

Z. Hu

South China University of Technology

David James

Chalmers, Chemistry and Chemical Engineering, Applied Chemistry, Polymer Technology

J. Chen

South China University of Technology

Ergang Wang

Chalmers, Chemistry and Chemical Engineering, Applied Chemistry, Polymer Technology

Lintao Hou

Jinan University

Journal of Materials Chemistry A

20507488 (ISSN) 20507496 (eISSN)

Vol. 3 36 18365-18371

Subject Categories

Chemical Sciences

DOI

10.1039/c5ta03831f

More information

Latest update

4/1/2019 8