Core–shell CdTe–TiO2 nanostructured solar cell

Zhang, Mengyao; Wang, Yennai; Moulin, Etienne; Grützmacher, Detlev; Chien, Chung-Jen; Chang, Pai‐Chun; Gao, Xinfeng; Carius, R.; Lu, Jia Grace

doi:10.1039/c2jm31091k

Cited by 26 publications

(16 citation statements)

References 27 publications

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“…It is not possible to compare the solar parameters obtained, since no reported studies have been found elsewhere based on the same structure. However, a core-shell solar cell based on CdTe decorating TiO 2 nanotube arrays was reported by M. Zhang et al [7]. In that study, V oc and J sc were calculated to be 0.23 V and 1.23 mA cm À2 , respectively with a corresponding power conversion efficiency of 0.10%, which is slightly lower than that obtained with CdTe decorating a TiO 2 NR-based core-shell solar cell.…”

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confidence: 74%

“…In addition, although there are numerous studies on dye-sensitized 1-D nanostructured solar cells, little effort has been focused on the integration of 1-D nanostructured inorganic materials to fabricate semiconductor-synthesized solar cells. Among type-II core-shell structures, TiO 2 /CdTe is a promising material combination because of the superior properties of TiO 2 NR and the excellent properties of the CdTe material pair, with an ideal band gap (1.45 eV) matching the most abundant part of the solar spectrum, a high absorption coefficient (10 Â 10 5 cm À1 at 700 nm) and long-term stability [7].…”

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confidence: 99%

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A baseball-bat-like CdTe/TiO2 nanorods-based heterojunction core–shell solar cell

Karaağaç¹,

Parlak²,

Aygün³

et al. 2013

Scripta Materialia

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Rutile TiO 2 nanorods on fluorine-doped thin oxide glass substrates via the hydrothermal technique were synthesized and decorated with a sputtered CdTe layer to fabricate a core-shell type n-TiO 2 /p-CdTe solar cell. Absorbance spectrum verified the absorption contribution of both TiO 2 and CdTe to the absorption process. The solar cell parameters, such as open circuit voltage, short circuit current density, fill factor and power conversion efficiency were found to be 0.34 V, 1.27 mA cm À2 , 28% and 0.12%, respectively.

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confidence: 74%

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confidence: 99%

A baseball-bat-like CdTe/TiO2 nanorods-based heterojunction core–shell solar cell

Karaağaç¹,

Parlak²,

Aygün³

et al. 2013

Scripta Materialia

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“…Titanium dioxide (TiO 2 ) is drawing the attention of researchers worldwide, especially due to its unique properties such as high transparency in the visible range with a wide bandgap, absence of toxicity, abundance in nature and good chemical stability in adverse environment, etc. The structural and optical properties of TiO 2 have made it a fascinating material for applications in solar cells (Minutillo et al 2008;Zhang et al 2012), photocatalysis (Tavares et al 2007), for adsorption of proteins (Topoglidis et al 2000), single or multilayer optical coatings (Ray et al 2007), dye-sensitized solar cells (O'Regan and Grätzel 1991). These physical properties depend on its atomic distribution and can be changed by doping TiO 2 with different dopants.…”

Section: Introductionmentioning

confidence: 99%

Investigation of optical, structural and morphological properties of nanostructured boron doped TiO 2 thin films

Sönmezoğlu

Askeroğlu

2013

Bull Mater Sci

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Pure and different ratios (1, 3, 5, 7 and 10%) of boron doped TiO 2 thin films were grown on the glass substrate by using sol-gel dip coating method having some benefits such as basic and easy applicability compared to other thin film production methods. To investigate the effect of boron doped on the physical properties of TiO 2 , structural, morphological and optical properties of growth thin films were examined. 1% boron-doping has no effect on optical properties of TiO 2 thin film; however, optical properties vary with > 1%. From X-ray diffraction spectra, it is seen that TiO 2 thin films together with doping of boron were formed along with TiB 2 hexagonal structure having (111) orientation, B 2 O 3 cubic structure having (310) orientation, TiB 0•024 O 2 tetragonal structure having rutile phase (110) orientation and polycrystalline structures. From SEM images, it is seen that particles together with doping of boron have homogeneously distributed and held onto surface. Keywords. Boron doped TiO 2 ; nanoparticles; thin films; optical and morphological characterizations.

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“…Size tuneable optical and electronic properties of semiconductor quantum dots (QDs) have made them interesting materials for various applications. Solar cell fabrication is one of the applications, [1][2][3][4][5] in which QDs and their hybrids such as polymer-QD hybrids, 6,7 CNT-QD hybrids 8 and polymer-coreshell QD hybrids [9][10][11] have been used. Tandem photo-electrochemical solar cells 12 and depleted-heterojunction solar cells 13 are some other new device designs recently tried for solar cell fabrication.…”

Section: Introductionmentioning

confidence: 99%

Systematic investigation of the structure and photophysical properties of CdSe, CdSe/ZnS QDs and their hybrid with β-carotene

et al. 2013

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A systematic investigation was conducted to determine the excitation energy dependent emission characteristics of CdSe quantum dot-b-carotene and CdSe/ZnS core-shell quantum dot-b-carotene hybrid samples. The emission intensity was recorded at different excitation energies by continuously varying the excitation energy from the band edge value of the QDs to a maximum value. In both the hybrids, the emission intensity increased with an increase of the excitation energy and then a sudden quenching occurred, which is in contrast with the results from bare samples, where the emission intensity showed a decreasing trend at all excitation energies. The quantum yields corresponding to the maximum emission are 47.12% and 69%, for CdSe QD-bC and CdSe/ZnS core-shell QD-bC hybrids, respectively. At higher excitation energy, electrons were transferred to the molecule's LUMO level, leaving behind holes in the valance band of the QD, and thus the produced charge separated state became responsible for the PL quenching in the hybrid sample. We have confirmed this charge separated state by lifetime measurements. It is because of this PL quenching behaviour of the hybrids that the nature of the interface band structure was deduced as type I. Furthermore, because of the involvement of higher energy photons in the quenching process, the transferred electrons in the LUMO level of the molecule were known as hot electrons. The present paper discusses the excited state electron dynamics across the interface between the two hybrid materials in detail.

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Core–shell CdTe–TiO2 nanostructured solar cell

Cited by 26 publications

References 27 publications

A baseball-bat-like CdTe/TiO2 nanorods-based heterojunction core–shell solar cell

A baseball-bat-like CdTe/TiO2 nanorods-based heterojunction core–shell solar cell

Investigation of optical, structural and morphological properties of nanostructured boron doped TiO 2 thin films

Systematic investigation of the structure and photophysical properties of CdSe, CdSe/ZnS QDs and their hybrid with β-carotene

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