S-shaped current-voltage characteristics of organic solar devices

被引：290

作者：

Wagenpfahl, A. ^{[1
]}

Rauh, D. ^{[2
]}

Binder, M. ^{[1
]}

Deibel, C. ^{[1
]}

Dyakonov, V. ^{[1
,2
]}

机构：

[1] Univ Wurzburg, D-97074 Wurzburg, Germany

[2] Bavarian Ctr Appl Energy Res ZAE Bayern, D-97074 Wurzburg, Germany

来源：

PHYSICAL REVIEW B | 2010年 / 82卷 / 11期

关键词：

CHARGE-LIMITED-CURRENTS; OPEN-CIRCUIT VOLTAGE; POLYMER; CELLS; RECOMBINATION; INJECTION; TRANSPORT; ENERGY;

D O I：

10.1103/PhysRevB.82.115306

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Measuring the current-voltage characteristic of organic bulk heterojunction solar devices sometimes reveals an S-shaped deformation. We qualitatively produce this behavior by a numerical device simulation assuming a reduced surface recombination. Furthermore we show how to experimentally create these double diodes by applying an oxygen plasma etch on the indium-tin-oxide anode. Restricted charge transport over material interfaces accumulates space charges and therefore creates S-shaped deformations. Finally we discuss the consequences of our findings for the open-circuit voltage V-oc.

引用

页数：8

共 44 条

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[Anonymous], 1967, PHYS TECHNOLOGY SEMI

[2] Space-charge-limited currents in materials with Gaussian energy distributions of localized states [J].