Simultaneous Increase in Open-Circuit Voltage and Efficiency of Fullerene-Free Solar Cells through Chlorinated Thieno[3,4-b]thiophene Polymer Donor

Wang, Huan1; Chao, Pengjie1; Chen, Hui1; Mu, Zhao1; Chen, Wei2,3; He, Feng1

2017-09

10.1021/acsenergylett.7b00551

ACS Energy Letters   影响因子和分区

2380-8195

The chlorinated polymer, PBTCI, has been found to be an efficient donor in nonfullerene polymer solar cells (PSCs), which showed a blue-shifted absorbance compared to that of its fluorine analogue (PTB7-th) and resulted in more complementary light absorption with a nonfullerene acceptor, such as ITIC. Meanwhile, chlorine substitution lowered the HOMO level of PBTCI, which increased the open-circuit voltage of the corresponding polymer-based devices. The 2D GIWAXS analysis illustrated that the PBTCI/ITIC blend film exhibited a "face-on" orientation and scattering features of both PBTCI and ITIC, suggesting that the blend of PBTCI and ITIC was phase-separated and formed individual crystalline domains of the donor and acceptor, which promoted charge transfer in the bicontinuous film and eventually elevated the solar energy conversion efficiency. The PBTCI-based nonfullerene PSC exhibited a maximum PCE of 7.57% with a V-oc of 0.91 V, which was an approximately 13% increasing in the PCE compared to that of the fluorine-analogue-based device.

SCI ; EI

英语

第一 ; 通讯

U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences[DE-AC02-06CH11357]

Chemistry ; Electrochemistry ; Energy & Fuels ; Science & Technology - Other Topics ; Materials Science

Chemistry, Physical ; Electrochemistry ; Energy & Fuels ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary

WOS:000410600500006

AMER CHEMICAL SOC

20183905864542

Charge transfer ; Chlorine compounds ; Conversion efficiency ; Energy conversion ; Light absorption ; Open circuit voltage ; Polymer solar cells ; Polymers ; Solar energy ; Timing circuits

Energy Conversion Issues:525.5 ; Solar Energy and Phenomena:657.1 ; Solar Cells:702.3 ; Pulse Circuits:713.4 ; Light/Optics:741.1 ; Chemical Reactions:802.2 ; Polymeric Materials:815.1

Web of Science

1.Southern Univ Sci & Technol, Dept Chem, Shenzhen 518055, Peoples R China
2.Argonne Natl Lab, Mat Sci Div, 9700 Cass Ave, Lemont, IL 60439 USA
3.Univ Chicago, Inst Mol Engn, 5640 South Ellis Ave, Chicago, IL 60637 USA

Wang, Huan,Chao, Pengjie,Chen, Hui,et al. Simultaneous Increase in Open-Circuit Voltage and Efficiency of Fullerene-Free Solar Cells through Chlorinated Thieno[3,4-b]thiophene Polymer Donor[J]. ACS Energy Letters,2017,2(9):1971-1977.

Wang, Huan,Chao, Pengjie,Chen, Hui,Mu, Zhao,Chen, Wei,&He, Feng.(2017).Simultaneous Increase in Open-Circuit Voltage and Efficiency of Fullerene-Free Solar Cells through Chlorinated Thieno[3,4-b]thiophene Polymer Donor.ACS Energy Letters,2(9),1971-1977.

Wang, Huan,et al."Simultaneous Increase in Open-Circuit Voltage and Efficiency of Fullerene-Free Solar Cells through Chlorinated Thieno[3,4-b]thiophene Polymer Donor".ACS Energy Letters 2.9(2017):1971-1977.