Title :
Modeling and optimization of polymer based bulk heterojunction (BH) solar cell
Author :
Ray, Biswajit ; Nair, Pradeep R. ; García, R. Edwin ; Alam, Muhammad A.
Author_Institution :
Dept. of Electr. & Comput. Eng., Purdue Univ., West Lafayette, IN, USA
Abstract :
A polymer phase separation model based on Cahn-Hilliard equation and a three-dimensional (3D) coupled exciton/electron/hole transport model in the disordered, phase-segregated morphology so generated, allow us to predict - possibly for the first time - the morphology dependent performance limits of polymer/fullerene bulk heterostructure (BH) solar cells. We relate the optimum anneal time to polymer sizes, solvent content, film thickness, and anneal temperature and find that a regularization of the morphology can double the efficiency of BH cells.
Keywords :
annealing; electron mobility; excitons; fullerene devices; hole mobility; solar cells; 3D coupled exciton-electron-hole transport model; Cahn-Hilliard equation; anneal temperature; film thickness; morphology dependent performance; optimum anneal time; polymer based bulk heterojunction solar cell; polymer size; polymer-fullerene bulk heterostructure solar cells; solvent content; Annealing; Charge carrier processes; Equations; Excitons; Heterojunctions; Morphology; Photovoltaic cells; Polymer films; Predictive models; Solar power generation;
Conference_Titel :
Electron Devices Meeting (IEDM), 2009 IEEE International
Conference_Location :
Baltimore, MD
Print_ISBN :
978-1-4244-5639-0
Electronic_ISBN :
978-1-4244-5640-6
DOI :
10.1109/IEDM.2009.5424282
