Charge transport and efficiency in photovoltaic devices based on polyfluorene blends

Henry J. Snaith; Ian B. Malone; Catherine M. Ramsdale; Richard H. Friend; Neil C. Greenham

doi:10.1117/12.559631

3 November 2004 Charge transport and efficiency in photovoltaic devices based on polyfluorene blends

Henry J. Snaith, Ian B. Malone, Catherine M. Ramsdale, Richard H. Friend, Neil C. Greenham

Proceedings Volume 5520, Organic Photovoltaics V; (2004) https://doi.org/10.1117/12.559631
Event: Optical Science and Technology, the SPIE 49th Annual Meeting, 2004, Denver, Colorado, United States

Abstract

Polymer blends allow control of microstructure in donor-acceptor photovoltaic devices. Here we present measurements of devices containing polyfluorene blend layers of different thicknesses, and we are able to extract characteristic transport lengths for electrons and holes. We also present analytical and numerical modeling of single-layer and bilayer photovoltaic devices, which demonstrates the importance of bound polaron pairs formed after the initial electron transfer from donor to acceptor. Field-assisted dissociation of these polaron pairs is a critical process in determining device performance.

Citation Download Citation

Henry J. Snaith, Ian B. Malone, Catherine M. Ramsdale, Richard H. Friend, and Neil C. Greenham "Charge transport and efficiency in photovoltaic devices based on polyfluorene blends", Proc. SPIE 5520, Organic Photovoltaics V, (3 November 2004); https://doi.org/10.1117/12.559631

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