Reduction of open circuit voltage loss in a polymer photovoltaic cell via interfacial molecular design: Insertion of a molecular spacer

被引：9

作者：

Bilby, David ^{[1
]}

Amonoo, Jojo ^{[2
]}

Sykes, Matthew E. ^{[1
]}

Frieberg, Bradley ^{[3
]}

Huang, Bingyuan ^{[1
]}

Hungerford, Julian ^{[4
]}

Shtein, Max ^{[1
,3
,4
]}

Green, Peter ^{[1
,2
,3
,4
]}

Kim, Jinsang ^{[1
,3
,4
,5
]}

机构：

[1] Univ Michigan, Dept Mat Sci & Engn, Ann Arbor, MI 48109 USA

[2] Univ Michigan, Dept Appl Phys, Ann Arbor, MI 48109 USA

[3] Univ Michigan, Dept Macromol Sci & Engn, Ann Arbor, MI 48109 USA

[4] Univ Michigan, Dept Chem Engn, Ann Arbor, MI 48109 USA

[5] Univ Michigan, Dept Chem, Ann Arbor, MI 48109 USA

来源：

APPLIED PHYSICS LETTERS | 2013年 / 103卷 / 20期

关键词：

ALKYL SIDE-CHAIN; CHARGE-TRANSFER STATES; SOLAR-CELLS; ENERGY-LEVEL; DONOR; POLY(3-ALKYLTHIOPHENE); TRANSPORT; ACCEPTOR; MORPHOLOGY; BLENDS;

D O I：

10.1063/1.4831974

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Loss to the open circuit voltage (V-oc) in organic photovoltaic cells is a critical bottleneck to achieving high power conversion efficiency. We demonstrate that the insertion of multilayers of a poly(phenylene ethynylene) spacer into the planar heterojunction between poly(3-hexylthiophene) and phenyl-C-61-butyric acid methyl ester incrementally escalates the V-oc of a polymer solar cell from 0.43 V to 0.9 V. Through a combination of light intensity and temperature dependent measurements, we show that this control over the molecular structure local to the interface increases V-oc by raising the polaron pair energy and by suppressing the dark-diode current. (C) 2013 AIP Publishing LLC.

引用

页数：5

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