Efficiency of 2D Photonic Crystal Emitters in Thermophotovoltaic Systems

Mitchell Jones,Matthew Ryan,Tomas Walsh,Lee Burdett

doi:10.5130/pamr.v3i0.1422

Mitchell Jones, Matthew Ryan + Show 2 more

Open Access

https://doi.org/10.5130/pamr.v3i0.1422

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Abstract

Thermophotovoltaic (TPV) systems have the potential to convert energy in a very efficient way by using 2D photonic crystal (PhC) emitters. Recent advancements in TPV technology have developed many methods for effectively generating power. These recent advancements propose that emitters can suppress low energy photon emissions while increasing higher energy photon emissions. This can be achieved by utilising new 2D photonic crystal (PhC) structures on the surface of the emitter with varying diameter and shape.In this meta study we consider the multiple design fabrications of photonic crystal emitters and compare the efficiencies, power densities, and their potential use for converting different wavelengths into heat and power. This is done by analysing the thermodynamic factors present in the system that could potentially reduce the efficiency, and therefore power generation, of the thermophotovoltaic cell. This study found that certain shapes and materials can impact on the PhC structure and its ability to emit energy.

Highlights

Thermophotovoltaic (TPV) cells are capable of converting thermal radiation from man-made high temperature sources into electricity through the use of photonic crystals (PhC)
This study found that certain shapes and materials can impact on the PhC structure and its ability to emit energy
There are differences in terms of cost to produce, different temperature output and the efficiency of the cell. 3.1. 1D fabrication 1D PhCs are made of inorganic materials that are in alternating stacks of SiO2 and TiO2 for the best result, in terms of the reflection they are able to replicate, the reflective index of SiO2 thin films is 1.24 and for TiO2 it is 1.74

Summary

Introduction

Thermophotovoltaic (TPV) cells are capable of converting thermal radiation from man-made high temperature sources into electricity through the use of photonic crystals (PhC). This ability poses a viable alternative to fossil fuels, which is very beneficial, especially in space stations and extraterrestrial habitats where fuel takes up large amounts of cargo space. TPV cells can theoretically boast a high power density, taking up a relatively small amount of space for the energy they produce They are reliable, as they don’t contain a large amount of mechanical or moving parts, and they require little to no maintenance to operate for extended periods of time. The only way we can get any form of efficiency is by producing materials with a very small band gap e.g. GaSb (Gallium Antimonide) and InAs (Indium Arsenide)

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