Fruit extracts and ruthenium polypyridinic dyes for sensitization of TiO2 in photoelectrochemical solar cells

Garcia, Christian Graziani; Polo, André Sarto; Iha, Neyde Yukie Murakami

doi:10.1016/s1010-6030(03)00225-9

Cited by 147 publications

(69 citation statements)

References 21 publications

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“…This makes electron transfer from the anthocyanins molecule to the conduction band of ZnO (Garcia et al 2003). As reported (Pradhan et al 2007, Cherapy et al 1997, anthocyanins from various plants gave different sensitizing performances.…”

Section: Introductionmentioning

confidence: 79%

“…Moreover, the process to synthesize the complexes is complicated and costly. Alternatively, natural dyes can be used for the same purpose with an acceptable efficiency (Pradhan et al 2007, Polo and Iha 2006, Garcia et al 2003, Smested 1998and Cherapy et al 1997. The advantages of natural dyes include their availability and low cost (Cherapy et al 1997).…”

Section: Introductionmentioning

confidence: 99%

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Absorption Spectra of Natural Dyes and Their Effect on Efficiency of ZnO Based Dye-Sensitized Solar Cells

Karki

Nakarmi

Mandal

et al. 2013

Nepal Journal of Science and Technology

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Natural dye-sensitized solar cells (DSSC) are one of the most promising devices for the solar energy conversion due to their low production cost and low environmental impact. The synthesis and performance study of Zinc oxide (ZnO) nanorods based DSSC is reported in the present paper. ZnO nanorods were fabricated using sol-gel spin coating process and different types of DSSCs were fabricated using two different classes of natural dyes, xanthenes, anthocyanins and a mixed-dye with equal proportion mixture of xanthenes and anthocyanins. The ultravioletvisible (UV-Vis.) absorbance spectra were compared with performances of the cells. Efficiency of fabricated cells and cell characteristics were found to be related with absorption spectra of dyes.

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Section: Introductionmentioning

confidence: 79%

Section: Introductionmentioning

confidence: 99%

Absorption Spectra of Natural Dyes and Their Effect on Efficiency of ZnO Based Dye-Sensitized Solar Cells

Karki

Nakarmi

Mandal

et al. 2013

Nepal Journal of Science and Technology

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“…Sebuah kelompok peneliti di Jepang, Minoura et.al. [6] telah mencoba lebih dari dua puluh jenis dye alami dari ekstrak tumbuhan sebagai fotosensitiser pada sistem sel surya ini, diantaranya adalah kol merah, kunyit, teh hijau, dan sebagainya. Kelompok lain dari Brazil, Iha et.al .…”

Section: Pendahuluanunclassified

PENGGUNAAN EKSTRAK ANTOSIANIN KOL MERAH SEBAGAI FOTOSENSITIZER PADA SEL SURYA TiO2 NANOKRISTAL TERSENSITISASI DYE

Maddu¹,

Zuhri²

2010

MST

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AbstrakTelah dipabrikasi sel surya TiO 2 nanokristal padat tersensitisasi dye menggunakan ekstrak antosianin dari kol merah sebagai fotosensitizer. Sel surya dibentuk dengan struktur sandwich, dimana dua elektroda mengapit elektrolit polimer yang mengandung kopel redoks I -/I 3 -. Salah satu elektroda, yaitu elektroda kerja berupa lapisan TiO 2 pada substrat kaca berlapis bahan TCO (transparent conducting oxide) disensitisasi dengan dye antosianin sebagai donor elektron dalam sistem sel surya ini. Elektroda lain berupa lempengan karbon sebagai elektroda lawan. Elektrolit gel berbasis PEG (polyethylene glycol) mengandung kopel redoks I -/I 3 -digunakan sebagai pengganti elektrolit cair pada sel fotoelektrokimia ini. Dua sel yang dipabrikasi memiliki luas 1 cm 2 direndam dengan dye antosianin masing-masing selama 1 jam dan 24 jam. Sel-sel ini diuji dengan penyinaran menggunakan lampu halogen 24 Watt dengan intensitas 4 mW/cm 2 pada jarak 30 cm. Hasil pengujian sel-sel ini memperlihatkan karakteristik I-V yang ideal dengan parameter keluaran: tegangan rangkaian buka (V OC ) 500 mV, arus rangkaian pendek (ISC) 5,6 µA dan 7,2 µA untuk masingmasing sel, fill factor (ff) 48% untuk kedua sel, konversi energi (η) 0,023% dan 0,055% masing-masing untuk sel yang direndam dengan dye selama 1 jam dan 24 jam. AbstractThe use of Red Cabbage's anthocyanine extract as a photosensitizer on a Dye-Sensitized Nanocrystalline TiO 2 Solar Cell. A solid-state dye-sensitized nanocrystalline TiO 2 solar cell utilizing anthocyanin extract form red cabbage as photosensitizer was fabricated. The solar cell was formed in sandwich structure, which two electrodes sandwiching polymer electrolyte containing a redox couple (I -/I 3 -). One of the electrodes, namely working electrode, TiO 2 layer on TCO (transparent conducting oxide) coated glass substrate was sensitized with anthocyanin dye as electron donor in the system. Another electrode was a carbon sheet as a counter electrode. Gel electrolyte based on PEG (polyethylene glycol) containing a redox couple (I -/I 3 -) used instead of liquid electrolyte in this photoelectrochemical cell. Two fabricated cells have an active area of 1 cm 2 were soaked with anthocyanine dye for 1 hr and 24 hrs, respectively. The cells were tested by irradiation with halogen lamp of 24 Watt with intensity 4 mW/cm 2 at a distance 30 cm. The testing results of the cells show an ideal I-V characteristic with output parameters: open circuit voltage (V OC ) of 500 mV, short circuit current (I SC ) of 5,6 µA and 7,2 µA for each cells, fill factor (FF) of 48% for both cells, energy conversion (η) of 0.023 % and 0,055 % for the cells with 1 hr and 24 hrs dye soaked, respectively.

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“…At present, the conversion efficiencies of natural dye sensitized DSSCs are quite low [4,5]. The efficiency can be improved by tailoring the optical absorption of dye as well as electron transport/recombination at each and every interface within the device [6].…”

Section: Introductionmentioning

confidence: 99%

Optical Absorption and Adsorption of Natural Dye Extracts on TiO2 Scaffolds: Comparison between Green Leaf- and Red Fruit-Extracts

Maung¹,

Theint²,

Lwin³

et al. 2017

JMSE-B

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Natural dyes were extracted from green leaves (henna and pomegranate) and red fruits (dragon fruit, rosella and red beet) and used as photosensitizer in DSSCs (dye sensitized solar cells). Two groups of green and red dye extracts exhibit a complementary absorption characteristic. Adsorption capacity of dye on TiO 2 scaffolds was accessed by the red-shift of the UV-Vis and Fourier transform infrared absorption peaks while electrochemical energy levels were estimated by cyclic voltammetry measurement. This optical and electrochemical characterization reveals that henna dye (among green leaf extracts) and rosella dye (among red fruit extracts) present lower band gap energy, better dye adsorption on TiO 2 scaffolds and better energy alignment. It is thus expecting a lower energy photon harvest, increased dye surface area, reduced electron trapping and better electron injection which are favorable for solar cells. Relatively higher efficiency of DSSC using henna and rosella dye extracts is attributed to the speculated optical and electrical characteristics mentioned above.

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Fruit extracts and ruthenium polypyridinic dyes for sensitization of TiO2 in photoelectrochemical solar cells

Cited by 147 publications

References 21 publications

Absorption Spectra of Natural Dyes and Their Effect on Efficiency of ZnO Based Dye-Sensitized Solar Cells

Absorption Spectra of Natural Dyes and Their Effect on Efficiency of ZnO Based Dye-Sensitized Solar Cells

PENGGUNAAN EKSTRAK ANTOSIANIN KOL MERAH SEBAGAI FOTOSENSITIZER PADA SEL SURYA TiO2 NANOKRISTAL TERSENSITISASI DYE

Optical Absorption and Adsorption of Natural Dye Extracts on TiO2 Scaffolds: Comparison between Green Leaf- and Red Fruit-Extracts

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