Enhanced Fill Factor through Chalcogen Side Chain Manipulation in Small-Molecule Photovoltaics

被引：24

作者：

Aldrich, Thomas J. ^{[1
,2
]}

Leonardi, Matthew J. ^{[1
,2
]}

Dudnik, Alexander S. ^{[1
,2
]}

Eastham, Nicholas D. ^{[1
,2
]}

Harutyunyan, Boris ^{[2
,3
]}

Fauvell, Thomas J. ^{[1
,2
,5
]}

Manley, Eric F. ^{[1
,2
,5
]}

Zhou, Nanjia ^{[2
,4
]}

Butler, Melanie R. ^{[1
,2
]}

Harschneck, Tobias ^{[1
,2
]}

Ratner, Mark A. ^{[1
,2
]}

Chen, Lin X. ^{[1
,2
,5
]}

Bedzyk, Michael J. ^{[2
,3
,4
]}

Chang, Robert P. H. ^{[2
,4
]}

Melkonyan, Ferdinand S. ^{[1
,2
]}

Facchetti, Antonio ^{[1
,2
,6
]}

Marks, Tobin J. ^{[1
,2
,4
]}

机构：

[1] Northwestern Univ, Dept Chem, 2145 Sheridan Rd, Evanston, IL 60208 USA

[2] Northwestern Univ, Argonne Northwestern Solar Energy Res Ctr, Evanston, IL 60208 USA

[3] Northwestern Univ, Dept Phys & Astron, Evanston, IL 60208 USA

[4] Northwestern Univ, Dept Mat Sci & Engn, Evanston, IL 60208 USA

[5] Argonne Natl Lab, Chem Sci & Engn Div, 9700 South Cass Ave, Lemont, IL 60439 USA

[6] Flexterra Corp, 8045 Lamon Ave, Skokie, IL 60077 USA

来源：

ACS ENERGY LETTERS | 2017年 / 2卷 / 10期

关键词：

POLYMER SOLAR-CELLS; POWER CONVERSION EFFICIENCY; TRANSIENT ABSORPTION; CHARGE RECOMBINATION; DIKETOPYRROLOPYRROLE; DONOR; BENZODITHIOPHENE; FULLERENE; ALKYLTHIO; DYNAMICS;

D O I：

10.1021/acsenergylett.7b00743

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The fill factor (FF) of organic photovoltaic (OPV) devices has proven difficult to optimize by synthetic modification of the active layer materials. In this contribution, a series of small-molecule donors (SMDs) incorporating chalcogen atoms of increasing atomic number (Z), namely oxygen, sulfur, and selenium, into the side chains are synthesized and the relationship between the chalcogen Z and the FF of OPV devices is characterized. Larger Z chalcogen atoms are found to consistently enhance FF in bulk-heterojunction OPVs containing PC61BM as the acceptor material. A significant,similar to 8% FF increase is obtained on moving from O to S to Se across three series of SMDs. The FF enhancement is found to result from the combination of more ordered morphology and decreased charge recombination in blend films for the high-Z-chalcogen SMDs. Because this FF enhancement is found within three series orSMDs, the overall strategy is promising for new SMD materials design.

引用

页码：2415 / 2421

页数：7

共 59 条

[31] New Insights into the Correlation between Morphology, Excited State Dynamics, and Device Performance of Small Molecule Organic Solar Cells [J].