The colour rendering index and correlated colour temperature of dye-sensitized solar cell for adaptive glazing application

Aritra Ghosh,Prabhu Selvaraj,Senthilarasu Sundaram,Tapas K Mallick

doi:10.1016/j.solener.2018.02.021

Aritra Ghosh, Prabhu Selvaraj + Show 2 more

Open Access

https://doi.org/10.1016/j.solener.2018.02.021

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Journal: Solar Energy	Publication Date: Mar 1, 2018
Citations: 76	License type: cc-by

Affiliation: University of Exeter

Abstract

The colour rendering index (CRI) and correlated colour temperature (CCT) of transmitted daylight through a DSSC glazing is an essential parameter for building interior space comfort. Six small-scale dye-sensitized solar cells (DSSCs) were fabricated by varying TiO2 electrode thickness, which offered luminous transmittance between 0.19 and 0.53. Below 0.5 transmittance, the CRI for this TiO2 electrode based DSSC glazing was less than 80. A strong linear correlation was found between CCT and CRI. The CRI of 53% transparent DSSC glazing had only 2.7% lower CRI than 77% transparent double glazing and 72% transparent vacuum glazing.

Highlights

Buildings consume 40% of energy worldwide due to heating, cooling and lighting (Sudan et al, 2015; Sudan and Tiwari, 2016, 2014) load demand (Al Dakheel and Tabet Aoul, 2017; Hee et al, 2015)
dye-sensitized solar cells (DSSCs) glazing has 45% less transmission compared to double glazing and 35% less than vacuum glazing, color rendering index (CRI) only compromise 2.7% less compared to both glazing
It was found that 53% and 50% transparent DSSC offered achievable CRI and correlated colour temperature (CCT)

Summary

Introduction

Buildings consume 40% of energy worldwide due to heating, cooling and lighting (Sudan et al, 2015; Sudan and Tiwari, 2016, 2014) load demand (Al Dakheel and Tabet Aoul, 2017; Hee et al, 2015). Adaptive glazing systems are in research interest for building window applications as they have potential of lighting demand reduction of building and introduce comfortable daylight into space (Jelle et al, 2012; Rezaei et al, 2017; Skandalos and Karamanis, 2015). CCT and CRI are the most aesthetic criteria as they show whether the spectrum coming inside through the glazing is suitable for occupant or cross the comfort level They are used to characterize the illumination quality of white light (D’Andrade and Forrest, 2004). CCT and CRI of DSSC glazing were compared with air filled double pane glazing and evacuated (vacuum) glazing

DSSC manufacturing

Evaluation of CRI and CCT

Luminous transmittance of DSSC

CCT and CRI for DSSC glazing

Conclusions