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Low Band Gap Polymer Solar Cells With Minimal Voltage Losses

C. Wang ; Xiaofeng Xu (Institutionen för kemi och kemiteknik, Polymerteknologi) ; W. Zhang ; J. Bergqvist ; Y. Xia ; X. Meng ; Kim Bini (Institutionen för kemi och kemiteknik, Polymerteknologi) ; W. Ma ; A. Yartsev ; K. Vandewal ; Mats R. Andersson (Institutionen för kemi och kemiteknik, Polymerteknologi) ; O. Inganäs ; M. Fahlman ; Ergang Wang (Institutionen för kemi och kemiteknik, Polymerteknologi)
Advanced Energy Materials (1614-6832). Vol. 6 (2016), p. 1600148.
[Artikel, refereegranskad vetenskaplig]

© 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.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.

Nyckelord: Conjugated polymers



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Denna post skapades 2016-08-19.
CPL Pubid: 240492

 

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SUstainable Novel FLexible Organic Watts Efficiently Reliable (SUNFLOWER) (EC/FP7/287594)