Simutaneously high open circuit voltage and high short circuit current density is a big challenge for achieving high efficiency polymer solar cells due to the excitonic nature of organic semdonductors. Herein, we developed a trialkylsilyl substituted 2D-conjugated polymer with the highest occupied molecular orbital level down-shifted by Si–C bond interaction. The polymer solar cells obtained by pairing this polymer with a non-fullerene acceptor demonstrated a high power conversion efficiency of 11.41% with both high open circuit voltage of 0.94 V and high short circuit current density of 17.32 mA cm−2 benefitted from the complementary absorption of the donor and acceptor, and the high hole transfer efficiency from acceptor to donor although the highest occupied molecular orbital level difference between the donor and acceptor is only 0.11 eV. The results indicate that the alkylsilyl substitution is an effective way in designing high performance conjugated polymer photovoltaic materials.
%0 Journal Article
%1 bin201611
%A Bin, Haijun
%A Gao, Liang
%A Zhang, Zhi-Guo
%A Yang, Yankang
%A Zhang, Yindong
%A Zhang, Chunfeng
%A Chen, Shanshan
%A Xue, Lingwei
%A Yang, Changduk
%A Xiao, Min
%A Li, Yongfang
%D 2016
%I Nature Publishing Group
%J Nature Communications
%K additionally nonfullerene organic
%P 13651
%R 10.1038/ncomms13651
%T 11.4% Efficiency non-fullerene polymer solar cells with trialkylsilyl substituted 2D-conjugated polymer as donor
%U /brokenurl#http:https://dx.doi.org/10.1038/ncomms13651
%V 7
%X Simutaneously high open circuit voltage and high short circuit current density is a big challenge for achieving high efficiency polymer solar cells due to the excitonic nature of organic semdonductors. Herein, we developed a trialkylsilyl substituted 2D-conjugated polymer with the highest occupied molecular orbital level down-shifted by Si–C bond interaction. The polymer solar cells obtained by pairing this polymer with a non-fullerene acceptor demonstrated a high power conversion efficiency of 11.41% with both high open circuit voltage of 0.94 V and high short circuit current density of 17.32 mA cm−2 benefitted from the complementary absorption of the donor and acceptor, and the high hole transfer efficiency from acceptor to donor although the highest occupied molecular orbital level difference between the donor and acceptor is only 0.11 eV. The results indicate that the alkylsilyl substitution is an effective way in designing high performance conjugated polymer photovoltaic materials.
@article{bin201611,
abstract = {Simutaneously high open circuit voltage and high short circuit current density is a big challenge for achieving high efficiency polymer solar cells due to the excitonic nature of organic semdonductors. Herein, we developed a trialkylsilyl substituted 2D-conjugated polymer with the highest occupied molecular orbital level down-shifted by Si–C bond interaction. The polymer solar cells obtained by pairing this polymer with a non-fullerene acceptor demonstrated a high power conversion efficiency of 11.41% with both high open circuit voltage of 0.94 V and high short circuit current density of 17.32 mA cm−2 benefitted from the complementary absorption of the donor and acceptor, and the high hole transfer efficiency from acceptor to donor although the highest occupied molecular orbital level difference between the donor and acceptor is only 0.11 eV. The results indicate that the alkylsilyl substitution is an effective way in designing high performance conjugated polymer photovoltaic materials.},
added-at = {2016-12-22T13:51:53.000+0100},
author = {Bin, Haijun and Gao, Liang and Zhang, Zhi-Guo and Yang, Yankang and Zhang, Yindong and Zhang, Chunfeng and Chen, Shanshan and Xue, Lingwei and Yang, Changduk and Xiao, Min and Li, Yongfang},
biburl = {https://www.bibsonomy.org/bibtex/2b5fbcdb9ee33ee125857db0531713a87/bretschneider_m},
doi = {10.1038/ncomms13651},
interhash = {b552545588233235c0b290e6775a40cc},
intrahash = {b5fbcdb9ee33ee125857db0531713a87},
issn = {2041-1723},
journal = {Nature Communications},
keywords = {additionally nonfullerene organic},
month = {12},
pages = 13651,
publisher = {Nature Publishing Group},
timestamp = {2016-12-22T13:52:24.000+0100},
title = {11.4% Efficiency non-fullerene polymer solar cells with trialkylsilyl substituted 2D-conjugated polymer as donor},
url = {/brokenurl#http:https://dx.doi.org/10.1038/ncomms13651},
volume = 7,
year = 2016
}