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Hole transport and electrical properties in poly(p-phenylene vinylene):methanofullerene bulk-heterojunction solar cells

Y. GUO1, L. G. WANG1,* , T. X. ZHANG1, D. L. XIE1

Affiliation

  1. School of Electrical Engineering and Automation, Henan Polytechnic University, Jiaozuo, 454000, People’s Republic of China

Abstract

The dependence of the hole transport and electrical properties of OC1C10-PPV:PCBM (poly(2-methoxy-5-(3',7'-dimethyloctyloxy)-p-phenylene vinylene):methanofullerene [6,6]-phenyl C61-butyric acid methyl ester)-based bulk-heterojunction solar cells on their composition has been investigated. It is demonstrated that the current density versus voltage ( J V ) characteristics of OC1C10-PPV:PCBM devices can be accurately described by using our recently introduced mobility model. Furthermore, we find that the width of the Gaussian density of states  and hole zero-field mobilities in blends of OC1C10-PPV:PCBM are a function of PCBM weight percentage. The hole mobilities gradually increase with increasing fullerene concentration, whereas the values of the width of the Gaussian density of states  gradually decrease with increasing fullerene concentration. In addition, it is shown that the boundary carrier density of OC1C10-PPV:PCBM-based devices has an important effect on the J V characteristics, and the variation of voltage with boundary carrier density is dependent on the current density.

Keywords

Organic solar cells, Bulk-heterojunction, Hole transport, Electrical properties.

Submitted at: Feb. 12, 2018
Accepted at: Nov. 29, 2018

Citation

Y. GUO, L. G. WANG, T. X. ZHANG, D. L. XIE, Hole transport and electrical properties in poly(p-phenylene vinylene):methanofullerene bulk-heterojunction solar cells, Journal of Optoelectronics and Advanced Materials Vol. 20, Iss. 11-12, pp. 624-628 (2018)