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.

Biswajit Ray is a Phd student in the school of Electrical and Computer Engineering, Purdue university, West Lafayette, Indiana. He works with Prof. Muhammad Ashraf Alam in the area of polymer based solar cell. Before joining Purdue he did Masters from Indian Institute of Science, Bangalore, India in 2008 and Bachelors in Electrical and Electronics Engineering from National Institute of Technology, Trichy, India in 2006.

NCN@Purdue Student Leadership Council
Network for Computational Nanotechnology (NCN)

�Modeling and Optimization of Polymer based Bulk Heterojunction (BH)Solar cell �, B. Ray, P.R. Nair, R. E. García, M. Alam, International
Electron Devices Meeting (IEDM), Baltimore, USA, Dec 2009.

Researchers should cite this work as follows:

• Biswajit ray (2010), "Modeling and Optimization of Polymer Based Bulk Heterojunction (BH) Solar Cell," https://nanohub.org/resources/8407.

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1. nanophotonics
2. solar cells
3. solar energy