Modelling of High Performance OPVs with integrated storage

Lead Research Organisation: Durham University
Department Name: Engineering

Abstract

Organic Photovoltaic diodes (OPVs) have been the subject of intense research for more than 20 years due to the possibility of cheap, scalable manufacture of a renewable energy source which is well-suited to small-scale generation. For much of that time, tweaks in molecular structure and processing yielded devices with non-viable efficiencies of 7% or less. However, recent step-changes in OPV efficiency to above 17% have been demonstrated for Tandem architectures (Meng et al., Science, 361, 1094 (2018)), suggesting that Tandem devices are the key to unlocking the potential of organic semiconductors for energy generation.

A roadblock in the development of Tandem OPVs is the lack of accurate device simulations to i) enable rational design of the complex multi-layer structure and ii) understand the key issues of Tandem OPVs separate to single junction OPVs. Tandem OPV development therefore relies upon trial-and-error optimisation and simplistic detailed-balance analyses. These simple models ignore the details of many aspects of Tandem OPV performance that have been shown to be important in single-junction devices, such as morphology dependence of geminate and non-geminate recombination, internal electric field distribution, and charge injection to name a few.

This project may also extend to consider modelling of integrated storage with OPV modules, focussing on the role materials selection has upon performance, and ultimately integrated system characteristics.

Publications

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Studentship Projects

Project Reference Relationship Related To Start End Student Name
EP/S023836/1 01/04/2019 30/09/2027
2283365 Studentship EP/S023836/1 01/10/2019 30/09/2023 Cai Williams