Direct Determination of Total Hemispherical Emittance of Perovskite and Silicon Solar Cells

Granados, Laura; Takamure, Noboru; Bing, Jueming; Huang, Shujuan; Merhvarz, Hamid; McKenzie, David R.; Ho‐Baillie, Anita

doi:10.1016/j.xcrp.2019.100008

Cited by 7 publications

(3 citation statements)

References 37 publications

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“…The proposed solution consists of four high power white LED arrays arranged in compact layout to be broadly applicable as multi-purposes workbench laboratory facility. The main application of the system is the measurement of absorptance and emittance in selective solar absorbers [33][34][35][36]. As described in the work [37], the observed difference in solar absorptance between optical and calorimetric measurements was due to a not perfect calibration of the adopted illumination system.…”

Section: Introductionmentioning

confidence: 99%

Low Cost High Intensity LED Illumination Device for High Uniformity Laboratory Purposes

D’Alessandro¹,

Maio²,

Mundo³

et al. 2020

Preprint

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Uniform illumination is a key requirement in different research fields. However, this requirement is often difficult to achieve when high intensity is required at the same time. Recent advancements in LED lamps allow nowadays for compact and economical solutions. In this work we present a suitable solution for various laboratory purposes requiring stable, uniform and high intensity illumination. The system is composed of four identical high power white LED arrays of 30 mm diameter each, placed on a supporting and cooling structure having a minimum volume of 26 cm x 26 cm x 8 cm. A numerical model has been developed, based on a ray tracing software, in order to simulate the performances. These have then been experimentally validated with measurements of the power density map, carried out with a 1% uncertainty pyranometer. Data show that the built system is very stable over time and provides an illumination uniformity higher than 98%, on a surface of 50 mm radius, which reduces to 95% on a surface of 75 mm radius. The power density can be adjusted in the 390-1360 W m-2 range, not affecting uniformity.

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Section: Introductionmentioning

confidence: 99%

Low Cost High Intensity LED Illumination Device for High Uniformity Laboratory Purposes

D’Alessandro¹,

Maio²,

Mundo³

et al. 2020

Preprint

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“…The solar cell is a semiconductor that produces direct electrical energy by conversion solar energy into electrical energy [1]- [3]. The conversion consists of several stages: (1) light absorption to the semiconductor, and (2) generates and separates the positive and negative charges through its terminals.…”

Section: Introductionmentioning

confidence: 99%

Implementation of Gyrinops Versteegii Gaharu Leaves as a Dye-Sensitized Solar Cell

Mashari

Prihanto

2019

FESPE

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Dye-Sensitized Solar Cell (DSSC) is a photoelectrochemical solarcell that uses electrolytes as the cargo transport medium. Gratzeldeveloped it as an alternative resource through the discovery of thelatest solar cell material by mimicking the photosynthesis processcalled photo-electrochemical reactions. According to the researchof Saputra, flavonoids can be used as dyes in Dye-Sensitized SolarCells, while Yanti in 2014 studied the agarwood leaf extract thatcontained flavonoids and chlorophyll. This study aimed to design,build, and test Dye-Sensitized Solar Cell by testing the lightabsorption, and the Performance of Dye-Sensitized Solar Cell usingAgarwood Chlorophyll. This research extracted the Gyrinopsversteegii that was grouped into young, medium and old leaves.With the same dose of extract, 15 grams of agarwood leaves weredissolved in 96% ethanol for 100 ml. The results showed that eventhough the maximum absorption power was the same, or 4.00, themedium leaves absorbed the light more than its wavelength range.The DSSC performance test results obtained the voltages of theyoung, medium, and old agarwood leaves that were 0.398 V, 0.399V, and 0.369 V. The currents of those leaves were 0.01 mA, 0.01mA, and 0.01 mA respectively.

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“…The main complication of these direct measurements is that all radiation sources (sample, background, detector) are of the same order of magnitude [23]. Other nonradiometric types of emissivity characterization involve calorimetric measurements based on heat flux measurements, which provide total hemispherical emissivity values directly [29], [30].…”

mentioning

confidence: 99%

Angle-Resolved Direct Emissivity Measurements on Unencapsulated Solar Cells for Passive Thermal Control

de Arrieta,

Echániz,

Fuente

et al. 2024

IEEE J. Photovoltaics

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The emissivity of two unencapsulated photovoltaic cells has been measured by a direct radiometric method, between 30 and 50 °C, and indirectly at room temperature. The advantages of the angle-resolved direct method for the determination of the emissivity of the bare cell, and the challenge of using direct measurements around room temperature, are discussed. This method allows calculating the total hemispherical emissivity by incorporating directional data, which are usually lacking. These data also reveal important differences between the infrared responses of both cells, despite the similarities in the more commonly reported normal spectra. These differences stem from the structure of the cells. A comparison to the integrating-sphere indirect method illustrates the improved accuracy of the emissivity values and their potential for evaluating the thermal performance of the cells and potential radiative cooling gains in select applications, where the emissivity of the bare cell is not concealed by encapsulation. An estimation of the magnitude of this effect, obtained using a simplified heattransfer model, is significantly less than 1% in absolute efficiency for realistic parameter values. More work is needed to quantify gains from encapsulated cells, which are expected to be even lower because of the higher emissivity of silica glass.

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Direct Determination of Total Hemispherical Emittance of Perovskite and Silicon Solar Cells

Cited by 7 publications

References 37 publications

Low Cost High Intensity LED Illumination Device for High Uniformity Laboratory Purposes

Low Cost High Intensity LED Illumination Device for High Uniformity Laboratory Purposes

Implementation of Gyrinops Versteegii Gaharu Leaves as a Dye-Sensitized Solar Cell

Angle-Resolved Direct Emissivity Measurements on Unencapsulated Solar Cells for Passive Thermal Control

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