UNSW School of Photovoltaic & Renewable Energy Engineering
Exploring and Controlling Energy Transport in Organic Semiconductors
James Cave - University of Bath, UK

James Cave, at UNSW SPREE, 6 July 2015

James Cave (47Min)

University of Bath, UK

James Cave speaks at UNSW SPREE


Many organic semiconductors do not readily generate free charge carriers upon light excitation - rather, excitons are created. Excitons play an important role in organic electronics, in particular light emitting diodes and photovoltaic devices, and so it is desirable to understand and control exciton transport.

A 3-dimensional kinetic Monte Carlo (KMC) model has been developed to analyse energy transport. Förster Resonance Energy theory (FRET) is used to calculate hopping rates on a molecular scale. The model predicts where and when excitons annihilate through dissociation or recombination. KMC simulations were run to investigate novel mesoscopic structures to extend exciton diffusion and control the directionality of exciton transport.

Recently, ternary organic solar cells that utilise long-range energy transfer have attracted a lot of attention. The KMC model is also used to assess the structural requirements and required material properties for efficient energy transfer in these devices.

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Brief Bio

James Cave is a postgraduate student at the University of Bath, UK, working on mesoscale modelling of perovskite and organic solar devices as a part of CDT-PV, linked to the SuperSolar Hub. He is currently in Newcastle, NSW, working jointly between CSIRO and the University of Newcastle modelling ternary organics.