Influence of the highest occupied molecular orbital energy level of the donor material on the effectiveness of the anode buffer layer in organic solar cells

被引：18

作者：

Bernede, J. C. ^{[1
]}

Cattin, L. ^{[2
]}

Djobo, S. Ouro ^{[3
]}

Morsli, M. ^{[3
]}

Kanth, S. R. B. ^{[4
]}

Patil, S. ^{[4
]}

Leriche, P. ^{[1
]}

Roncali, J. ^{[1
]}

Godoy, A. ^{[5
]}

Diaz, F. R. ^{[6
]}

del Valle, M. A. ^{[6
]}

机构：

[1] Grp Syst Conjugues Lineaires, UNAM, CNRS, UMR 6200, F-49045 Angers, France

[2] Inst Jean Rouxel IMN, UNAM, UMR 6502, F-44000 Nantes, France

[3] Univ Nantes, LAMP, EA 3825, Fac Sci & Tech, F-44000 Nantes, France

[4] Indian Inst Sci, Solid State & Struct Chem Unit, Bangalore 560012, Karnataka, India

[5] Univ San Sebastian, Prog Bachiller, Cs Biolog Qcas 7, Bellavista, Chile

[6] Univ Catolica Chile, Fac Quim, Santiago 4860, Chile

来源：

PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE | 2011年 / 208卷 / 08期

关键词：

buffer layers; organic solar cells; thin films; PHOTOVOLTAIC CELLS; WORK FUNCTION; METAL; EFFICIENCY; DEVICES;

D O I：

10.1002/pssa.201127047

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Efficiency of organic photovoltaic cells based on organic electron donor/organic electron acceptor junctions can be strongly improved when the transparent conductive Anode is coated with a Buffer Layer (ABL). Here, the effects of a metal (gold) or oxide (molybdenum oxide) ABL are reported, as a function of the Highest Occupied Molecular Orbital (HOMO) of different electron donors. The results indicate that a good matching between the work function of the anode and the highest occupied molecular orbital of the donor material is the major factor limiting the hole transfer efficiency. Indeed, gold is efficient as ABL only when the HOMO of the organic donor is close to its work function Phi(Au). Therefore we show that the MoO3 oxide has a wider field of application as ABL than gold. (C) 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

引用

页码：1989 / 1994

页数：6

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