Low Band Gap Polymer Solar Cells With Minimal Voltage Losses
Journal article, 2016

One of the factors limiting the performance of organic solar cells (OSCs) is their large energy losses (E loss) in the conversion from photons to electrons, typically believed to be around 0.6 eV and often higher than those of inorganic solar cells. In this work, a novel low band gap polymer PIDTT-TID with a optical gap of 1.49 eV is synthesized and used as the donor combined with PC71BM in solar cells. These solar cells attain a good power conversion efficiency of 6.7% with a high open-circuit voltage of 1.0 V, leading to the E loss as low as 0.49 eV. A systematic study indicates that the driving force in this donor and acceptor system is sufficient for charge generation with the low E loss. This work pushes the minimal E loss of OSCs down to 0.49 eV, approaching the values of some inorganic and hybrid solar cells. It indicates the potential for further enhancement of the performance of OSCs by improving their V oc since the E loss can be minimized.

Conjugated polymers

Author

C. F. Wang

Linköping University

Xiaofeng Xu

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

W. Zhang

Lund University

J. Bergqvist

Linköping University

Y. X. Xia

Linköping University

Xiangyi Meng

Xi'an Jiaotong University

Kim Bini

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

W. Ma

Xi'an Jiaotong University

A. Yartsev

Lund University

K. Vandewal

Technische Universität Dresden

Mats Andersson

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

Olle Inganaes

Linköping University

M. Fahlman

Linköping University

Ergang Wang

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

Advanced Energy Materials

1614-6832 (ISSN) 1614-6840 (eISSN)

Vol. 6 18 1600148-

SUstainable Novel FLexible Organic Watts Efficiently Reliable (SUNFLOWER)

European Commission (FP7), 2011-10-01 -- 2016-03-31.

Areas of Advance

Nanoscience and Nanotechnology (2010-2017)

Energy

Materials Science

Subject Categories

Nano Technology

Chemical Sciences

DOI

10.1002/aenm.201600148

More information

Latest update

3/2/2018 9