Abstract

This work aims to derive an expression to describe the reflection coefficient of an escape electron from metal-semiconductor interface of DSSC. The derivation was obtained by analytically solving electron diffusion equation with assumptions of steady state DSSC and negligible current flow at the outer most part of the film. The derived corrected Richardson-Dushman equation including a reflection of electron wave at potential barrier is inserted into current-voltage (JV) characteristic equation. We showed that voltage loss at various temperature and current densities do not vary with and without reflection coefficient. However, the reflection coefficient is shown to be insignificant to JV characteristics with respect to potential barriers. Our results confirm the effect of potential barrier through which an electron must be accelerated in order to gain sufficient energy necessary for high power conversion efficiency. Key words: DSSC, drift-diffusion, metal-semiconductor, reflection coefficient.

Highlights

  • Development of clean energy represents one of the society’s foremost challenges in 21st century

  • The derivation was obtained by analytically solving electron diffusion equation with assumptions of steady state Dye- Sensitized Solar cells (DSSC) and negligible current flow at the outer most part of the film

  • We showed that voltage loss at various temperature and current densities do not vary with and without reflection coefficient

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Summary

Introduction

Development of clean energy represents one of the society’s foremost challenges in 21st century. Modern civilization and developments in all aspects have been rapidly accelerating with increase in energy demand and consumption which serve as characteristics for civilizations (Li and Wu, 2015). Sunlight is a compelling solution to our need for clean and abundant energy sources, with potential capacity to supply world’s current energy demands. The sun supplied about amount of energy to the Earth surface which is ten thousand times greater than our todays’ energy needs (Grätzel, 2005). Solar energy today accounts for

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