Low Band Gap Polymer Solar Cells With Minimal Voltage Losses
Artikel i vetenskaplig tidskrift, 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

Författare

C. F. Wang

Linköpings universitet

Xiaofeng Xu

Chalmers, Kemi och kemiteknik, Tillämpad kemi, Polymerteknologi

W. Zhang

Lunds universitet

J. Bergqvist

Linköpings universitet

Y. X. Xia

Linköpings universitet

Xiangyi Meng

Xi'an Jiaotong University

Kim Bini

Chalmers, Kemi och kemiteknik, Tillämpad kemi, Polymerteknologi

W. Ma

Xi'an Jiaotong University

A. Yartsev

Lunds universitet

K. Vandewal

Technische Universität Dresden

Mats Andersson

Chalmers, Kemi och kemiteknik, Tillämpad kemi, Polymerteknologi

Olle Inganaes

Linköpings universitet

M. Fahlman

Linköpings universitet

Ergang Wang

Chalmers, Kemi och kemiteknik, Tillämpad kemi, Polymerteknologi

Advanced Energy Materials

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

Vol. 6 18 1600148-

SUstainable Novel FLexible Organic Watts Efficiently Reliable (SUNFLOWER)

Europeiska kommissionen (FP7), 2011-10-01 -- 2016-03-31.

Styrkeområden

Nanovetenskap och nanoteknik

Energi

Materialvetenskap

Ämneskategorier

Nanoteknik

Kemi

DOI

10.1002/aenm.201600148

Mer information

Senast uppdaterat

2018-03-02