Modeling of bulk and bilayer organic heterojunction solar cells

被引：35

作者：

Cuiffi, Joseph ^{[1
]}

Benanti, Travis ^{[1
]}

Nam, Wook Jun ^{[1
]}

Fonash, Stephen ^{[1
]}

机构：

[1] Penn State Univ, Ctr Nanotechnol Educ & Utilizat, University Pk, PA 16802 USA

来源：

APPLIED PHYSICS LETTERS | 2010年 / 96卷 / 14期

关键词：

molecular electronic states; organic semiconductors; semiconductor device models; semiconductor heterojunctions; solar cells; surface recombination; TRANSPORT; PHOTOVOLTAICS; PERFORMANCE; MORPHOLOGY;

D O I：

10.1063/1.3383232

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Solar cells require symmetry-breaking features such as built-in electrostatic fields and/or effective fields. We examine an organic heterojunction structure with no built-in field and explore the origins of its current-voltage characteristics and open circuit voltage (V-OC). Two behaviors are found: (1) V-OC=V-I+m[(HOMO(D) - (LUMO(A)] where m approximate to 1, the intercept (V-I) is determined by interface recombination kinetics, HOMO(D) is the donor highest occupied molecular orbital, and LUMO(A) is the acceptor lowest unoccupied molecular orbital; (2) if interface recombination is suppressed, V-OC is controlled by bulk/contact recombination and is not dependent upon HOMO(D) - LUMO(A).

引用

页数：3

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