Electronic Properties of Interfaces between PCPDTBT and Prototypical Electrodes Studied by Photoemission Spectroscopy

被引：19

作者：

Ayguel, Umut ^{[1
]}

Peisert, Heiko ^{[1
]}

Frisch, Johannes ^{[2
]}

Vollmer, Antje ^{[3
]}

Koch, Norbert ^{[2
]}

Chasse, Thomas ^{[1
]}

机构：

[1] Univ Tubingen, Inst Phys & Theoret Chem, D-72076 Tubingen, Germany

[2] Humboldt Univ, Inst Phys, D-12489 Berlin, Germany

[3] Speicherring BESSY II, Helmholtz Zentrum Berlin Mat & Energie, D-12489 Berlin, Germany

来源：

CHEMPHYSCHEM | 2011年 / 12卷 / 12期

关键词：

conjugated polymers; electronic structure; interfaces; organic solar cells; photoelectron spectroscopy; ORGANIC-ORGANIC INTERFACES; HETEROJUNCTION SOLAR-CELLS; ENERGY-LEVEL ALIGNMENT; CHARGE-INJECTION; TIN OXIDE; BAND-GAP; DEVICES; METAL; GOLD; SEMICONDUCTORS;

D O I：

10.1002/cphc.201000999

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：

We report on the electronic structure of poly[2,6-(4,4-bis(2-ethylhexyl)-4H-cyclopenta[2,1-b;3,4-b']dithiophene)-alt-4,7(2,1,3-benzothiadiazole)] (PCPDTBT), a promising low-bandgap donor material for efficient bulk heterojunction organic solar cells. Electronic properties of interfaces formed between PCPDTBT and prototypical electrodes [Au, indium-tin-oxide and poly(ethylene-dioxythiophene): poly(styrenesulfonate)], obtained from X-ray photoemission spectroscopy and ultraviolet photoemission spectroscopy, are evaluated. The formation of interface dipoles is observed, and their consequences for device performance are discussed. For the system PCPDTBT/Au chemical interactions occur, which may affect in particular the charge extraction at the corresponding interface.

引用

页码：2345 / 2351

页数：7

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