Understanding the Halogenation Effects in Diketopyrrolopyrrole-Based Small Molecule Photovoltaics.
Two molecules containing a central diketopyrrolopyrrole and two oligothiophene units have been designed and synthesized. Comparisons between the molecules containing terminal F (FDPP) and Cl (CDPP) atoms allowed us to evaluate the effects of halogenation on the photovoltaic properties of the small molecule organic solar cells (OSCs). The OSCs devices employing FDPP:PC71BM films showed power conversion efficiencies up to 4.32%, suggesting that fluorination is an efficient method for constructing small molecules for OSCs.
State Key Laboratory of Applied Organic Chemistry (SKLAOC), Key Laboratory of Special Function Materials and Structure Design (MOE), College of Chemistry and Chemical Engineering, Lanzhou University , Lanzhou, 730000, P. R. China.
Shi-Xin
SX
Sun
State Key Laboratory of Applied Organic Chemistry (SKLAOC), Key Laboratory of Special Function Materials and Structure Design (MOE), College of Chemistry and Chemical Engineering, Lanzhou University , Lanzhou, 730000, P. R. China.
Yong
Y
Huo
Institute of Polymer Chemistry and Collaborative Innovation Center of Chemical Science and Engineering, College of Chemistry, Nankai University , Tianjin, 300071, P. R. China.
Miao-Miao
MM
Li
Department of Polymer Engineering, College of Polymer Science and Engneering and Department of Polymer Engineering, College of Polymer Science and Engineering, The University of Akron , Akron, Ohio 44236, United States.
Xiaowen
X
Hu
Institute of Polymer Chemistry and Collaborative Innovation Center of Chemical Science and Engineering, College of Chemistry, Nankai University , Tianjin, 300071, P. R. China.
Hai-Jun
HJ
Zhang
State Key Laboratory of Applied Organic Chemistry (SKLAOC), Key Laboratory of Special Function Materials and Structure Design (MOE), College of Chemistry and Chemical Engineering, Lanzhou University , Lanzhou, 730000, P. R. China.
You-Wen
YW
Zhang
State Key Laboratory of Applied Organic Chemistry (SKLAOC), Key Laboratory of Special Function Materials and Structure Design (MOE), College of Chemistry and Chemical Engineering, Lanzhou University , Lanzhou, 730000, P. R. China.
You-Dan
YD
Zhang
State Key Laboratory of Applied Organic Chemistry (SKLAOC), Key Laboratory of Special Function Materials and Structure Design (MOE), College of Chemistry and Chemical Engineering, Lanzhou University , Lanzhou, 730000, P. R. China.
Xiao-Long
XL
Chen
State Key Laboratory of Applied Organic Chemistry (SKLAOC), Key Laboratory of Special Function Materials and Structure Design (MOE), College of Chemistry and Chemical Engineering, Lanzhou University , Lanzhou, 730000, P. R. China.
Zi-Fa
ZF
Shi
Department of Polymer Engineering, College of Polymer Science and Engneering and Department of Polymer Engineering, College of Polymer Science and Engineering, The University of Akron , Akron, Ohio 44236, United States.
Xiong
X
Gong
Institute of Polymer Chemistry and Collaborative Innovation Center of Chemical Science and Engineering, College of Chemistry, Nankai University , Tianjin, 300071, P. R. China.
Yongsheng
Y
Chen
State Key Laboratory of Applied Organic Chemistry (SKLAOC), Key Laboratory of Special Function Materials and Structure Design (MOE), College of Chemistry and Chemical Engineering, Lanzhou University , Lanzhou, 730000, P. R. China.
Hao-Li
HL
Zhang
device optimization; diketopyrrolopyrrole; halogenation effect; organic solar cells; solution-processed small molecules