Aging of flat heterojunction zinc phthalocyanine/fullerene C60 organic solar cells

被引：38

作者：

Lessmann, R. ^{[1
]}

Hong, Z. ^{[1
]}

Scholz, S. ^{[1
]}

Maennig, B. ^{[1
]}

Riede, M. K. ^{[1
]}

Leo, K. ^{[1
]}

机构：

[1] Tech Univ Dresden, Inst Angew Photophys, D-01062 Dresden, Germany

来源：

ORGANIC ELECTRONICS | 2010年 / 11卷 / 04期

关键词：

Solar cell; Aging; Stability; C-60; ZnPc; Oxidation; Mass spectrometry; External quantum efficiency; ACCELERATED LIFETIME MEASUREMENTS; PHOTOVOLTAIC CELLS; DEGRADATION; STABILITY; DEVICES; OXYGEN; BANDGAP; LAYERS; FILMS; C60;

D O I：

10.1016/j.orgel.2009.12.010

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

This work addresses the long-term aging of organic solar cells based on a. at zinc phthalocyanine (ZnPc)/C-60 heterojunction. We investigate both the typical degradation behavior of the short circuit current and of the saturated photocurrent, defined as I(-1V). The latter remains constant after a relatively small initial decay, which is directly related to a substantial reduction of the contribution of excitons generated in C-60 to the external quantum efficiency. Mass spectroscopy analysis of the organic material after aging revealed oxidized C-60 and sub-products thereof. The reduction of I(-1V) is thus attributed to the reaction of C-60 molecules with oxygen impurities. The results strongly suggest that ZnPc/C-60 photovoltaic cells are intrinsically very stable on a time scale of thousand of hours if such reactions are prevented. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：539 / 543

页数：5

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