A combined experimental and theoretical study of natural betalain pigments used in dye-sensitized solar cells

Oprea, Corneliu I.; Dumbravă, Anca; Enache, I.; Georgescu, Adrian; Gîrţu, Mihai A.

doi:10.1016/j.jphotochem.2012.05.003

Cited by 73 publications

(67 citation statements)

References 48 publications

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“…Further the oxidation potential of betalain dyes has been found to be similar to that of ruthenium polypyridyl complexes. The strong binding nature of betalain dyes with TiO 2 surface and an efficient dye regeneration by iodine/iodide redox couple have been reported by earlier works [37,46]. Anthocyanin molecules containing glucose units may affect the effective bond formation on TiO 2 surface leading to slow electron transfer to the conduction band of TiO 2 .…”

Section: Current-voltage Characteristicsmentioning

confidence: 75%

“…Betalain dye-sensitized solar cells have shown an efficiency of 0.47 %. Oprea et al [37] have shown that the acidified methanol extraction of betalain dyes from beet root extract shows an efficiency of 0.04 %, after the removal of betaxanthin and other impurities. The extract of betalain dyes from bougainvillea and beet root has been used by Narayan and Sandquist to construct DSSCs.…”

Section: Current-voltage Characteristicsmentioning

confidence: 99%

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Betalain and anthocyanin dye-sensitized solar cells

Ramamoorthy

Radha²,

Maheswari³

et al. 2016

J Appl Electrochem

103

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In the present work, the mechanism behind the functioning of the eco-friendly dye-sensitized solar cell was explored. Dye-sensitized solar cells were fabricated using natural dyes extracted from common pear (Opuntia dillenii) and red tamarind (Tamarindus indica), and 1:1 mixture. Betalain and anthocyanin were identified as the main pigments that sensitize the semiconductor TiO 2 film. The best conversion efficiency of 0.47 % was achieved from betalain dyes and 0.14 % from anthocyanin dyesensitized solar cell [under standard Air Mass 1.5 illumination (85 mW cm -2 )]. The mixture of dye (1:1 mixture) adsorbed onto TiO 2 exhibited an efficiency of 0.20 %. The light absorption behavior of extracted dyes was studied using ultraviolet-visible analysis. The influence of the binding nature of the dyes with TiO 2 surface on the efficiency of the solar cells was analyzed through Fourier transform infra-red analysis. The electrochemical impedance spectroscopy was used to find out the internal charge transfer resistance of the cells. The device incident photonto-current efficiency was obtained from 5 to 25 % for different natural dyes and found to coincide with the photocurrent-voltage characteristics and electrochemical impedance spectroscopy analysis. Graphical Abstract

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Section: Current-voltage Characteristicsmentioning

confidence: 75%

Section: Current-voltage Characteristicsmentioning

confidence: 99%

Betalain and anthocyanin dye-sensitized solar cells

Ramamoorthy

Radha²,

Maheswari³

et al. 2016

J Appl Electrochem

103

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“…Subsequently DSCs have been prepared with such multilayer photoelectrodes and the cell efficiencies have been measured to correlate photoelectrode morphology and cell performance. As a sensitizer, a natural dye extract from bougainvillea bracts [28][29][30] has been used to fabricate DSCs as economically and friendly to the environment as possible. In spite of the lower efficiency, natural dyes are a valid alternative to expensive and rare organic dyes, offering simpler preparation techniques and wide availability [13,31].…”

Section: Introductionmentioning

confidence: 99%

Effects of multilayer coating and calcination procedures on the morphology of dye-sensitized solar cell semiconductor photoelectrodes

et al. 2015

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“…In dye-sensitized TiO 2 photoelectrode, the absorption of photon energy cause the electron transfer from highest occupied molecular orbital (HOMO) to lowest unoccupied molecular orbital (LUMO) following dihydropyridinie which attached on carboxyl group of dye-sensitizer. This caused photoexcitation dye state coupled electronically with an acceptor states in conduction band TiO 2 and lead to fast electron injection and increased photocurrent generation [10,16,25].…”

Section: Optical Light Absorption and Band Edge Analysismentioning

confidence: 99%

“…The study of betalain dye molecules bonding to the TiO 2 subtrate has been reported previously. They suggested that ability of betalain's anchor group, carboxyl is the key factors to an efficient PEC reaction [16].…”

Section: Introductionmentioning

confidence: 99%

Effect of Using Pitaya Peel as Dye-Sensitizer and Dye Molecules in Electrolyte for Photoelectrochemical Reaction

Jaafar¹,

Minggu²,

Arifin³

et al. 2016

MJAS

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Natural dye sensitizer in photoelectrochemical shows a great potential in improving the efficiency of metal oxide semiconductor especially Titanium dioxide (TiO 2 ) due to its prominent in absorbing visible light and also low cost. In this work, the effect of using pitaya peel as natural dye sensitizes to TiO 2 has been studied through characterizations analysis and PEC test. The bare TiO 2 thin films were fabricated on Fluorine-doped tin oxide (FTO) glass substrate by doctor blade method meanwhile dyesensitized TiO 2 thin films prepared by immersion of TiO 2 in the dye extracts. The fabricated thin films were characterized with Scanning Electron Microscopy (SEM), X-ray difractometer (XRD), UV-Vis spectrophotometer and photoelectrochemical analysis. The surface of TiO 2 was porous and uniform meanwhile dye particles could not been observed due to very small size. The energy band gap of dye-sensitized TiO 2 from the UV-Vis spectrum is 2.1 eV which is smaller than bare TiO 2 (3.7 eV). Meanwhile, photoactivities of dye-sensitized TiO 2 has the highest compared to bare TiO 2 photoelectrodes which is 127µA/cm 2 in 6.25% v/v of pitaya dye in the electrolyte.Keywords: titanium dioxide, dye-sensitizers, betalains, photoelectrochemical cell, water splitting Abstrak Pemeka-pewarna semulajadi di dalam fotoelektromia (PEC) menunjukkan potensi yang bagus untuk meningkatkan keupayaan semikonduktor logam oksida terutamanya titanium dioksida (TiO 2 ) disebabkan kemampuannya untum menyerap cahaya nampak dan kos yang rendah. Di dalam penyelidikan ini, kesan menggunakan kulit buah naga sebagai pemeka-pewarna semulajadi terhadap TiO 2 telah dikaji melalui pencirian dan analisis fotoelektrokimia. Filem nipis TiO 2 asli telah dihasilkan melalui kaedah Doctor blade di atas kepingan kaca bersalut FTO (Stanum oksida terdop fluorin) manakala filem nipis TiO 2 dengan pewarnapemeka telah dihasilkan dengan merendam TiO 2 ke dalam larutan ekstrak pewarna. Filem nipis yang telah terbentuk telah melalui beberapa analisis pencirian iaitu, Mikroskopi Elektron Imbasan (SEM), Difraktometer Pembelauan Sinar-X (XRD), Spektrofotometer Ultralembayung dan Cahaya Nampak (UV-Vis) dan juga ujian fotoelektrokimia. Permukaan TiO 2 adalah berliang dan seragam manakala zarah pewarna tidak dapat dilihat disebabkan saiznya yang terlalu kecil. Jurang tenaga filem nipis TiO 2 dengan pewarna-pemeka adalah lebih rendah iaitu 2.1 eV jika dibandingkan dengan TiO 2 asli (3.7 eV). Manakala, fotoaktiviti bagi fotoelektrod TiO 2 dengan pewarna-pemeka adalah lebih tinggi daripada TiO 2 asli dengan 127µA/cm 2 di dalam kepekatan 6.25% v/v pewarna di dalam elektrolit. ISSN -2506 Siti Nur Hidayah et al: EFFECT OF USING PITAYA PEEL AS DYE-SENSITIZER AND DYE MOLECULES IN ELECTROLYTE FOR PHOTOELECTROCHEMICAL REACTION 652Kata kunci: titanium dioksida, pemeka-pewarna, betalain, sel fotoelektrokimia, pembelahan air Introduction The hydrogen gas production by using solar energy is deliberated as one of the most significant sustainable and clean energy technologies [1]. Photo...

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A combined experimental and theoretical study of natural betalain pigments used in dye-sensitized solar cells

Cited by 73 publications

References 48 publications

Betalain and anthocyanin dye-sensitized solar cells

Betalain and anthocyanin dye-sensitized solar cells

Effects of multilayer coating and calcination procedures on the morphology of dye-sensitized solar cell semiconductor photoelectrodes

Effect of Using Pitaya Peel as Dye-Sensitizer and Dye Molecules in Electrolyte for Photoelectrochemical Reaction

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