Device model for the operation of polymer/fullerene bulk heterojunction solar cells

被引：816

作者：

Koster, LJA ^{[1
]}

Smits, ECP ^{[1
]}

Mihailetchi, VD ^{[1
]}

Blom, PWM ^{[1
]}

机构：

[1] Univ Groningen, Mat Sci Ctr, NL-9747 AG Groningen, Netherlands

来源：

PHYSICAL REVIEW B | 2005年 / 72卷 / 08期

关键词：

D O I：

10.1103/PhysRevB.72.085205

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have developed a numerical device model that consistently describes the current-voltage characteristics of polymer:fullerene bulk heterojunction solar cells. Bimolecular recombination and a temperature- and field-dependent generation mechanism of free charges are incorporated. It is demonstrated that in poly[2-methoxy-5-(3('),7(')-dimethyloctyloxy)-p-phenylene vinylene]- (OC1C10-PPV-) and [6,6]-phenyl C-61-butyric acid methyl ester- (PCBM-) (1:4 wt. %) based solar cells space-charge effects only play a minor role, leading to a relatively constant electric field in the device. Furthermore, at short-circuit conditions only 7% of all free carriers are lost due to bimolecular recombination. The model predicts that an increased hole mobility together with a reduction of the acceptor strength of 0.5 eV will lead to a maximum attainable efficiency of 5.5% in the PPV/PCBM-based solar cells.

引用

页数：9

共 53 条

[1]

Augustynski J, 2003, J PHYS CHEM B, V107, P13544, DOI 10.1021/jp035111+

[2] Modeling the current-voltage characteristics of bilayer polymer photovoltaic devices [J].