Self-assembly of single dielectric nanoparticle layers and integration in polymer-based solar cells

Jonathan E. Allen, Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, New York 11973, USA
Biswajit Ray, Purdue University - Main Campus
Mohammad R. khan, Purdue University
Kevin G. Yager, Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, New York 11973, USA
Muhammad Ashraful Alam, Purdue University
Charles T. Black, Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, New York 11973, USA

Abstract

A single, self-assembled layer of highly uniform dielectric alumina nanoparticles improves the photovoltaic performance of organic semiconductor bulk heterojunction solar cells. The block copolymer based self-assembly approach is readily amenable to the large areas required for solar cell fabrication. A fraction of the performance gain results from incident light scattering which increases active layer absorption and photocurrent output, consistent with device simulations. The nanoparticle layer also roughens the device electrode surface, increasing contact area and improving device fill factor through more efficient charge collection

Discipline(s)

Electronic Devices and Semiconductor Manufacturing