A Compact Physical Model for Morphology Induced Intrinsic Degradation of Polymer based Bulk Heterojunction Solar Cell

Biswajit Ray, Purdue University - Main Campus
Muhammad A. Alam, Purdue University - Main Campus

Date of this Version

2011

Abstract

The gradual loss of efficiency during field operation poses a fundamental challenge for economic viability of any solar cell technology. Well known examples include light-induced degradation in Si-based cell (Staebler-Wronski effect), Cu diffusion in thin film (CIGS) cell, hot-spot degradation in series connected modules, etc. Here we develop a compact model for an intrinsic degradation concern for bulk heterojunction type organic photovoltaic (BH-OPV) cells that involve continued (thermal) phase segregation of the donor-acceptor molecules leading to characteristic loss of efficiency and performance. Our approach interprets a number of BH-OPV device degradation measurements within a common framework and suggests/rationalizes intuitive routes for lifetime improvement for such technologies.

Discipline(s)

Electronic Devices and Semiconductor Manufacturing | Power and Energy

 

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