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Characterization of photovoltaic devices for indoor light harvesting and customization of flexible dye solar cells to deliver superior efficiency under artificial lighting

descriptionPublicationkeyboard_double_arrow_right Article , Journal 01 Oct 2015 Italy Publisher:Elsevier BVJournal:Applied Energy, volume 156, pages 413-422 (issn: 0306-2619,

Authors: De Rossi, Francesca; Pontecorvo, Tadeo; Brown, Thomas M.;

doi: 10.1016/j.apenergy.2015.07.031

handle: 2108/213203

Characterization of photovoltaic devices for indoor light harvesting and customization of flexible dye solar cells to deliver superior efficiency under artificial lighting

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Abstract

Abstract The field of energy harvesting holds the promise of making our buildings “smart” if effective energy sources can be developed for use in ambient indoor conditions. Photovoltaics (PV), especially in its thin flexible form for easy integration, become a prime candidate for the aim, if tailored for low-density artificial light. We designed a test system which enabled us to measure the performance of PV devices under compact fluorescent lamp (CFL) and light-emitting diode (LED) illumination at different illuminance levels and compared polycrystalline and amorphous silicon cells with our own flexible dye solar cells (DSCs). Whereas poly-Si cells, with 15% outdoor efficiency, delivered at 200 lux under CFL only 2.8 μW/cm2 power density (and an efficiency of 4.4%), a-Si specifically designed for indoors, gave 5.9 μW/cm2 and 9.2% efficiency under the same CFL conditions (and 7.5% efficiency under LED). However, we show that the customization of flexible DSCs, by simply formulating ad-hoc less-concentrated, more transparent electrolytes, enabled these devices to outperform all others, providing average power densities of 8.0 μW/cm2 and 12.4% efficiencies under 200 lux CFL (more than quadruple compared to those measured at 1 sun), and 6.6 μW/cm2 and 10% efficiency under 200 lux LED illumination.

Country

Italy

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Keywords

690, Indoor measurement, Monitoring, Policy and Law, Energy harvesting, Mechanical Engineering, Amorphous silicon, Building and Construction, Management, Light harvesting, Energy (all), Settore ING-INF/01 - ELETTRONICA, Amorphous silicon; Dye sensitized solar cells; Energy harvesting; Indoor measurements; Light harvesting; Polycrystalline silicon; Building and Construction; Energy (all); Mechanical Engineering; Management, Monitoring, Policy and Law, Polycrystalline silicon, Dye sensitized solar cell

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	citations This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).	210
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	influence This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).	Top 1%
	impulse This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.	Top 1%