Charge transport kinetics in organic bulk heterojunction morphologies: Mesoscale Monte Carlo simulation analysis

Author

Maqsood, Ishtiaq ; Cundy, Lance D. ; Biesecker, Matt ; Jung-Han Kimn ; Darlington, Elise ; Hettwer, Ethan P. ; Schill, Sabina ; Bommisetty, Venkat

Author_Institution

Dept. of Electr. Eng. & Comput. Sci., South Dakota State Univ., Brookings, SD, USA

fYear

2014

fDate

8-13 June 2014

Firstpage

1758

Lastpage

1761

Abstract

Monte Carlo simulation was conducted to analyze the significance of morphology domains on charge transport dynamics in organic bulk heterojunction solar cells. Mesoscale simulation was performed using first reaction method with exponential charge carrier lifetime. Current density vs voltage characteristics were obtained for evenly distributed, graded and ordered morphologies. It was observed that assuming 100% exciton dissociation graded morphology resulted better power conversion efficiency than evenly distributed morphology due to improvement in fill factor (FF).

Keywords

Monte Carlo methods; carrier lifetime; organic semiconductors; solar cells; bulk heterojunction solar cells; charge transport dynamics; charge transport kinetics; current density; distributed morphologies; exciton dissociation graded morphology; exponential charge carrier lifetime; fill factor improvement; first reaction method; mesoscale Monte Carlo simulation analysis; ordered morphologies; organic bulk heterojunction morphologies; power conversion efficiency; voltage characteristics; Computational modeling; Heterojunctions; Monte Carlo methods; Morphology; Photovoltaic cells; Polymers; Bulk heterojunction; Miller-Abrahams; Transient analysis; interfacial recombination; steady state analysis;

fLanguage

English

Publisher

ieee

Conference_Titel

Photovoltaic Specialist Conference (PVSC), 2014 IEEE 40th

Conference_Location

Denver, CO

Type

conf

DOI

10.1109/PVSC.2014.6925261

Filename

6925261