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On the unipolarity of charge transport in methanofullerene diodes / Ardalan Armin; Safa Shoaee; Qianqian Lin; Paul L Burn; Paul Meredith

npj Flexible Electronics, Volume: 1, Issue: 1

Swansea University Author: Armin, Ardalan

Abstract

Fullerenes are electron transporting organic semiconductors with a wide range of applications. In particular, methanofullerenes have been the preferred choice for solution-processed solar cells and photodiodes. The wide applicability of fullerenes as both ‘ntype’ transport materials and electron acc...

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Published in: npj Flexible Electronics
ISSN: 2397-4621
Published: 2017
Online Access: Check full text

URI: https://cronfa.swan.ac.uk/Record/cronfa38453
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Abstract: Fullerenes are electron transporting organic semiconductors with a wide range of applications. In particular, methanofullerenes have been the preferred choice for solution-processed solar cells and photodiodes. The wide applicability of fullerenes as both ‘ntype’ transport materials and electron acceptors is clear. However, what is still a matter of debate is whether the fullerenes can also support efficient transport of holes, particularly in diode geometries. In this letter, we utilize a number of recently developed experimental methods for selective electron and hole mobility measurements. We show for the two most widely used solution processable fullerenes, PC70- and-PC60BM, that whilst both exhibit electron mobilities as high as 10−3 cm2/Vs, their hole mobilities are < 10−9 cm2/Vs. Thus charge transport in these fullerenes can be considered predominantly unipolar in diode configurations.
College: College of Science
Issue: 1