Issue 6, 2015
From the journal:

Materials Horizons

Simultaneous spin-coating and solvent annealing: manipulating the active layer morphology to a power conversion efficiency of 9.6% in polymer solar cells†

Zhicai He,a   Feng Liu,*bc   Cheng Wang,d   Jihua Chen,e   Lilin He,f   Dennis Nordlund,g   Hongbin Wu,*a   Thomas P. Russell*bch  and  Yong Caoa  

* Corresponding authors

a Institute of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510640, P. R. China
E-mail: hbwu@scut.edu.cn

b Materials Sciences Division, Lawrence Berkeley National Lab, Berkeley, California, USA
E-mail: iamfengliu@gmail.com

c Department of Polymer Science and Engineering, University of Massachusetts, Amherst, Massachusetts 01003, USA
E-mail: russell@mail.pse.umass.edu

d Advanced Light Source, Lawrence Berkeley National Lab, Berkeley, California, USA

e Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA

f Biology and Soft Matter Division, Neutron Sciences Directorate, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA

g Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA

h WPI-Advanced Institute for Materials Research, Tohoku University, 2-1-1 Katahira, Aoba, Sendai 980-8577, Japan

Abstract

We developed a simultaneous spin-coating/solvent-annealing process and demonstrated morphology optimization for PTB7 based organic photovoltaics. This novel processing method enhances the edge-on crystalline content in thin films and induces the formation of weak PCBM aggregates. As a result, the efficiency of polymer solar cells increased from 9.2% to a certified high efficiency of 9.61%, owing to an enhanced short-circuit current (Jsc, 18.4 mA cm−2vs. 17. 5 mA cm−2) and an improved fill factor.

Graphical abstract: Simultaneous spin-coating and solvent annealing: manipulating the active layer morphology to a power conversion efficiency of 9.6% in polymer solar cells

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Article information

DOI
https://doi.org/10.1039/C5MH00076A
Article type
Communication
Submitted
14 May 2015
Accepted
20 Aug 2015
First published
20 Aug 2015

Mater. Horiz., 2015,2, 592-597

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Simultaneous spin-coating and solvent annealing: manipulating the active layer morphology to a power conversion efficiency of 9.6% in polymer solar cells

Z. He, F. Liu, C. Wang, J. Chen, L. He, D. Nordlund, H. Wu, T. P. Russell and Y. Cao, Mater. Horiz., 2015, 2, 592 DOI: 10.1039/C5MH00076A

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