Polymer solar cells with enhanced fill factors

Guo, Xugang1,2,3; Zhou, Nanjia1,2,4; Lou, Sylvia J.1,2; Smith, Jeremy1,2; Tice, Daniel B.1,2; Hennek, Jonathan W.1,2; Ponce Ortiz, Rocio1,2,5; Lopez Navarrete, Juan T.5; Li, Shuyou2,4; Strzalka, Joseph6; Chen, Lin X.1,2,7; Chang, Robert P. H.2,4; Facchetti, Antonio1,2,8; Marks, Tobin J.1,2

2013-10

10.1038/NPHOTON.2013.207

Nature Photonics   影响因子和分区

1749-4885

Recent advances in polymer solar cell (PSC) performance have resulted from compressing the bandgap to enhance the short-circuit current while lowering the highest occupied molecular orbital to increase the open-circuit voltage. Nevertheless, PSC power conversion efficiencies are still constrained by low fill factors, typically below 70%. Here, we report PSCs with exceptionally high fill factors by combining complementary materials design, synthesis, processing and device engineering strategies. The donor polymers, PTPD3T and PBTI3T, when incorporated into inverted bulk-heterojunction PSCs with a PC71BM acceptor, result in PSCs with fill factors of 76-80%. The enhanced performance is attributed to highly ordered, closely packed and properly oriented active-layer microstructures with optimal horizontal phase separation and vertical phase gradation. The result is efficient charge extraction and suppressed bulk and interfacial bimolecular recombination. The high fill factors yield power conversion efficiencies of up to 8.7% from polymers with suboptimal bandgaps, suggesting that efficiencies above 10% should be realizable by bandgap modification.

SCI ; EI

英语

NI期刊 ; ESI高被引

其他

Junta de Andalucia[PO9-4708]

Optics ; Physics

Optics ; Physics, Applied

WOS:000325003100017

NATURE PUBLISHING GROUP

20134116837340

Conversion efficiency ; Efficiency ; Energy gap ; Heterojunctions ; Molecular orbitals ; Open circuit voltage ; Phase separation ; Polymers

Energy Conversion Issues:525.5 ; Thermodynamics:641.1 ; Semiconductor Devices and Integrated Circuits:714.2 ; Physical Chemistry:801.4 ; Polymeric Materials:815.1 ; Production Engineering:913.1

Web of Science

1.Northwestern Univ, Dept Chem, Evanston, IL 60208 USA
2.Northwestern Univ, Argonne Northwestern Solar Energy Res Ctr, Mat Res Ctr, Evanston, IL 60208 USA
3.South Univ Sci & Technol China, Dept Mat Sci & Engn, Shenzhen 518055, Guangdong, Peoples R China
4.Northwestern Univ, Dept Mat Sci & Engn, Evanston, IL 60208 USA
5.Univ Malaga, Dept Phys Chem, E-29071 Malaga, Spain
6.Argonne Natl Lab, Xray Sci Div, Argonne, IL 60439 USA
7.Argonne Natl Lab, Chem Sci & Engn Div, Argonne, IL 60439 USA
8.Polyera Corp, Skokie, IL 60077 USA

Guo, Xugang,Zhou, Nanjia,Lou, Sylvia J.,et al. Polymer solar cells with enhanced fill factors[J]. Nature Photonics,2013,7(10):825-833.

Guo, Xugang.,Zhou, Nanjia.,Lou, Sylvia J..,Smith, Jeremy.,Tice, Daniel B..,...&Marks, Tobin J..(2013).Polymer solar cells with enhanced fill factors.Nature Photonics,7(10),825-833.

Guo, Xugang,et al."Polymer solar cells with enhanced fill factors".Nature Photonics 7.10(2013):825-833.