Study of CdS-sensitized solar cells, prepared by ammonia-free chemical bath technique

Hossain, M. F.; Biswas, S.; Takahashi, T.

doi:10.1016/j.tsf.2009.09.178

Cited by 33 publications

(13 citation statements)

References 24 publications

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“…Fairly recently, colloidal quantum dots have attracted the interest of the electronic device engineering community as components of organic and inorganic materials combinations known as hybrid electronic materials (HEMs) [1][2][3][4][5]. With respect to nextgeneration optoelectronics, HEMs have shown promise as potential candidates in device applications such as fluorescent sensors [6], solar cells [7][8][9], and photodetectors [10]. In particular, cadmium sulfide quantum dots (Q-CdS), with their bulk bandgap energy of 2.4 eV at room temperature, have luminescent properties attractive to optical engineers.…”

Section: Discussionmentioning

confidence: 99%

A simple FBG sensor for strain–temperature discrimination

Parne

Prasad

Gupta

et al. 2011

Micro & Optical Tech Letters

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intensities. We obtained the highest FL for Q-CdS adsorbed onto GaAs for each of the three relative sizes of quantum dots. We suspect that this latter observation may be due to radiative recombination between electrons confined to the quantum dots with holes captured at the shallow acceptor level of the GaAsquantum dot interface. With an eye toward future HEM device applications, this higher FL emission would suggest further study of functionalized Q-CdS adsorbed onto GaAs. CONCLUSIONSWe have examined the FL spectra of AOT (dioctyl sulfoccinate) capped cadmium sulfide quantum dots (Q-CdS) deposited upon gold (Au), insulator (mica), and semiconductor (GaAs) substrates for their potential use in hybrid optoelectronic devices. Relative dot sizes were synthesized to increase from 1 to 5 nm with a respective increase in heptane concentration from 40 to 80 lL. Excitation and emission spectra are presented for the 200-400 nm and 400-700 nm ranges, respectively. For the smallest (40 lL heptane) quantum dots, a clear red shift in FL emission peak wavelength is observed from the Au, to mica, to GaAs substrate-based samples. For the midrange (70 lL) and largest (80 lL) Q-CdS samples, the longest emission peak wavelengths are observed for the quantum dots physisorbed to Au substrates with a subsequent decrease and then increase in emission wavelengths for the mica and GaAs substrate-based samples, respectively. Of the three types of substrates used, Q-CdS deposited upon GaAs exhibited the highest FL emission intensity, which bodes well for the possible integration of HEMs into next-generation device technology.ABSTRACT: A simple sensor using half the length of a 3-cm fiber Bragg grating embedded on a cantilever is proposed for the simultaneous measurement and discrimination of strain and temperature. The response of the sensor is linear from 30 to 200 C, and its strain and temperature sensitivities are found to be 3.38 pm/lm 19.05 pm/ C, respectively.ABSTRACT: A new silicon-based differential stacked spiral inductor (DSSI) was implemented using a standard 0.18-lm complimentary metal-oxide semiconductor technology. Based on the measured two-port S-parameter using a standard de-embedding procedure, the selfresonance frequency, f sr , and quality factor, Q, of the new DSSI were compared with a conventional DSSI. The f sr of the new DSSI was nearly twice as high as that of the conventional DSSI, and the Q value of the new DSSI was also enhanced.

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Section: Discussionmentioning

confidence: 99%

A simple FBG sensor for strain–temperature discrimination

Parne

Prasad

Gupta

et al. 2011

Micro & Optical Tech Letters

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“…Two solution-phase approaches to QD deposition are commonly used: (i) direct growth of quantum dots onto the mesoporous metal oxide by introduction of cationic and anionic species sequentially, e.g., successive ionic layer adsorption and reaction (SILAR), 64,65 or via chemical bath deposition (CBD), 66,67 and (ii) direct absorption of pre-synthesized colloidal quantum dots using bifunctional organic linker molecules. loading of QDs) while maintaining the quantum confinement is important for efficient QDSSC operation.…”

Section: Qd Sensitizers In Qdsscsmentioning

confidence: 99%

Atomic layer deposition in nanostructured photovoltaics: tuning optical, electronic and surface properties

2015

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Nanostructured materials offer key advantages for third-generation photovoltaics, such as the ability to achieve high optical absorption together with enhanced charge carrier collection using low cost components. However, the extensive interfacial areas in nanostructured photovoltaic devices can cause high recombination rates and a high density of surface electronic states. In this feature article, we provide a brief review of some nanostructured photovoltaic technologies including dye-sensitized, quantum dot sensitized and colloidal quantum dot solar cells. We then introduce the technique of atomic layer deposition (ALD), which is a vapor phase deposition method using a sequence of self-limiting surface reaction steps to grow thin, uniform and conformal films. We discuss how ALD has established itself as a promising tool for addressing different aspects of nanostructured photovoltaics. Examples include the use of ALD to synthesize absorber materials for both quantum dot and plasmonic solar cells, to grow barrier layers for dye and quantum dot sensitized solar cells, and to infiltrate coatings into colloidal quantum dot solar cell to improve charge carrier mobilities as well as stability. We also provide an example of monolayer surface modification in which adsorbed ligand molecules on quantum dots are used to tune the band structure of colloidal quantum dot solar cells for improved charge collection. Finally, we comment on the present challenges and future outlook of the use of ALD for nanostructured photovoltaics.

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“…Hossain et al [13] deposited CdS nanoparticles by the CBD method onto nanoporous TiO 2 to fabricate DSSCs and they obtained a conversion efficiency of about 1.13%. Mali and coworkers [14] found that the efficiency for TiO 2 microspheres covered by CdS nanoparticles reached 2.34%, while Choi et al [15] obtained 3.14% from the device that they synthesized, based on TiO 2 /CdS quantum dots.…”

Section: Introductionmentioning

confidence: 99%

Fabrication and characterization of nanowalls CdS/dye sensitized solar cells

Abdulelah

Ali

Mahdi

et al. 2017

Physica E: Low-dimensional Systems and Nanostructures

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Dye sensitized solar cells (DSSCs) are fabricated from porous cadmium sulfide (CdS) nanocrystalline thin films. The porous CdS nanostructured thin films are deposited onto FTO/glass substrates by the chemical bath deposition (CBD) method. The surface morphology, crystalline structure, and optical properties of the prepared nanocrystalline thin films are investigated. Rhodamine B, Malachite green, Eosin methylene blue, and Cresyl violet dyes are used to fabricate the DSSC devices. Comparing the absorption spectra of porous CdS nanocrystalline films, all dyes show an absorption peak in the transparent range of CdS thin films indicating that they are suitable for the preparation of DSSCs with CdS. Current-voltage ( -) characteristics show that the solar cell that is fabricated using Malachite green dye shows the highest conversion efficiency of 0.83% while using Rhodamine B dye produces a solar cell with lowest efficiency of 0.38%. However, heat treatment of the fabricated solar cells causes significant enhancement in the output of all devices.

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Study of CdS-sensitized solar cells, prepared by ammonia-free chemical bath technique

Cited by 33 publications

References 24 publications

A simple FBG sensor for strain–temperature discrimination

A simple FBG sensor for strain–temperature discrimination

Atomic layer deposition in nanostructured photovoltaics: tuning optical, electronic and surface properties

Fabrication and characterization of nanowalls CdS/dye sensitized solar cells

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