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Featured researches published by Zhiyuan Cong.
RSC Advances | 2016
Zhiyuan Cong; Shuo Liu; Baofeng Zhao; Weiping Wang; Hongli Liu; Jin Su; Zhaoqi Guo; Wei Wei; Chao Gao; Zhongwei An
Three donor–acceptor polymers based on two-dimensional conjugated alkylthienyl substituted benzo[1,2-b:4,5-b′]dithiophene (BDTT) and fluorinated 4,7-dialkylthienyl-2,1,3-benzothiadiazole (DTBT) derivatives were synthesized and applied as donor materials for bulk heterojunction solar cells. The effects of fluorine substitution on the absorption properties, energy levels, dielectric constants and photovoltaic properties of the polymers were investigated. We found that the incorporation of fluorine atoms on the DTBT unit can effectively deepen the highest occupied molecular orbital (HOMO) energy level and increase the dielectric constant of the polymers. As a result of these improved properties, a high open-circuit voltage (Voc) of 0.85 V was obtained for the optimal conventional polymer solar cells (PSCs) based on a two-fluorine-substituted analogue P3 blended with [6,6]-phenyl-C71 butyric acid methyl ester (PC71BM) as the active layer (1:1.5), giving rise to a high power conversion efficiency (PCE) of 7.48%. The influences of the molecular weight (MW) of P3 on the device performances were further studied and enhanced photovoltaic parameters were achieved for the medium molecular weight P3 based device, with a corresponding open circuit voltage (Voc) of 0.80 V, short-circuit current density (Jsc) of 14.7 mA cm−2, high fill factor (FF) of 71.9% and the resulting best PCE of 8.47%, verifying that P3 with an appropriate MW should be a promising polymer for highly efficient photovoltaic application.
Journal of Physical Chemistry C | 2013
Bo Qu; Di Tian; Zhiyuan Cong; Weiping Wang; Zhongwei An; Chao Gao; Zhi Gao; Hongsheng Yang; Lipei Zhang; Lixin Xiao; Zhijian Chen; Qihuang Gong
Reactive & Functional Polymers | 2012
Haimei Wu; Bo Qu; Zhiyuan Cong; Hongli Liu; Di Tian; Bowen Gao; Zhongwei An; Chao Gao; Lixin Xiao; Zhijian Chen; Huanhuan Liu; Qihuang Gong; Wei Wei
Synthetic Metals | 2012
Bo Qu; Hongsheng Yang; Di Tian; Hongli Liu; Zhiyuan Cong; Chao Gao; Zhijian Chen; Lixin Xiao; Zhi Gao; Wei Wei; Qihuang Gong
Polymer | 2015
Zhiyuan Cong; Baofeng Zhao; Haimei Wu; Zhaoqi Guo; Weiping Wang; Guoping Luo; Jin Xu; Yangjun Xia; Chao Gao; Zhongwei An
Reactive & Functional Polymers | 2013
Haimei Wu; Bo Qu; Di Tian; Zhiyuan Cong; Bowen Gao; Jianqun Liu; Zhongwei An; Chao Gao; Lixin Xiao; Zhijian Chen; Qihuang Gong; Wei Wei
Reactive & Functional Polymers | 2012
Chao Gao; Bo Qu; Dong Chen; Zhiyuan Cong; Jianqun Liu; Jian Chen; Zhongwei An; Zhijian Chen; Lixin Xiao; Wei Wei; Qihuang Gong
ACS energy letters | 2018
Weiping Wang; Baofeng Zhao; Zhiyuan Cong; Yuan Xie; Haimei Wu; Quanbin Liang; Sha Liu; Feng Liu; Chao Gao; Hongbin Wu; Yong Cao
Journal of Applied Polymer Science | 2013
Hongli Liu; Bo Qu; Jian Chen; Zhiyuan Cong; Zhongwei An; Chao Gao; Lixin Xiao; Zhijian Chen; Qihuang Gong
ACS Sustainable Chemistry & Engineering | 2018
Baofeng Zhao; Weiping Wang; Jingming Xin; Haimei Wu; Hongli Liu; Zhaoqi Guo; Zhiyuan Cong; Wei Ma; Chao Gao