Nanocrystalline TiO2 Solar Cells Sensitized with InAs Quantum Dots

Yu, Pingrong; Zhu, Kai; Norman, A. G.; Ferrere, Suzanne; Frank, and Arthur J.; Nozik, Arthur J.

doi:10.1021/jp064817b

Cited by 457 publications

(351 citation statements)

References 35 publications

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“…Owing to their wide tunable absorption range, e.g. quantum size effect, [2,4] and low cost performance, [5] QD has been employed as a sensitizer for dye sensitized solar cells [6]. In addition, QDs have also been considered as a key material for the third generation solar cell by utilizing hot electrons [7] and multiple charge carriers generated from a single photon [8].…”

Section: Introductionmentioning

confidence: 99%

Electron Injection from a CdS Quantum Dot to a TiO2 Conduction Band as an Efficiency Limiting Process: Comparison of QD Depositions between SILAR and Linker Assisted Attachment

Lee

Makuta

Sukarasep

et al. 2016

J. Photopol. Sci. Technol.

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Sensitization of TiO 2 by semiconductor quantum dots (QDs) initiates a primary charge separation in semiconductor quantum dot sensitized solar cells (QDSSCs), and thus is a key fundamental process controlling their solar cell performance. However, despite extensive researches on QD deposition methods, correlation between the solar cell performance and charge transfer dynamics modulated by the different deposition method has rarely been studied. Here, we demonstrate influence of a CdS QD deposition method on their solar cell performance and charge transfer dynamics. Two deposition methods, (i) in-situ QD synthesis directly on the TiO2 surface using a Successive Ionic Layer Adsorption and Reaction (SILAR) method, SILAR-CdS/TiO 2 , and (ii) linker assisted attachment of pre-synthesized QDs on the TiO 2 surface, PSM-CdS/TiO 2 , were investigated. The electron injection efficiency of SILAR-CdS/TiO 2 is estimated to be 96%, while that of PSM-CdS/TiO 2 is 40~50%. The charge recombination dynamics are similar for both films. Therefore, the QDSSC efficiency is essentially controlled by the electron injection process from a CdS QD to the TiO 2 conduction band.

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Section: Introductionmentioning

confidence: 99%

Electron Injection from a CdS Quantum Dot to a TiO2 Conduction Band as an Efficiency Limiting Process: Comparison of QD Depositions between SILAR and Linker Assisted Attachment

Lee

Makuta

Sukarasep

et al. 2016

J. Photopol. Sci. Technol.

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“…The fraction of the solar spectrum absorbed is connected to the optical gap, which can be tuned by the combination of TiO 2 with other solid-state materials or organic components. 6,[9][10][11][12][13][14][15] Whereas the experimental value for the electronic band gap still has a large degree of uncertainty, a general agreement seems to exist in literature concerning the indirect optical-absorption edge of these materials.…”

Section: Introductionmentioning

confidence: 99%

Self-energy and excitonic effects in the electronic and optical properties ofTiO2crystalline phases

et al. 2010

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We present a unified ab initio study of electronic and optical properties of TiO 2 rutile and anatase phases with a combination of density-functional theory and many-body perturbation-theory techniques. The consistent treatment of exchange and correlation, with the inclusion of many-body one-particle and two-particles effects in self-energy and electron-hole interaction, produces a high-quality description of electronic and optical properties, giving, for some quantities, the first available estimation for this compound. In particular, we give a quantitative estimate of the electronic and direct optical gaps, clarifying their role with respect to previous measurements obtained by various experimental techniques. We obtain a description for both electronic gap and optical spectra that is consistent with experiments by analyzing the role of different contributions to the experimental optical gap and relating them to the level of theory used in our calculations. We also show the spatial properties of excitons in the two crystalline phases, highlighting the localization character of different optical transitions. This paper aims at understanding and firmly establishing electro-optical bulk properties, yet to be clarified, of this material of fundamental and technological interest for green energy applications.

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“…5,[7][8][9][10][11][12] With so many parameters to adjust in terms of size and shape, little work has focused on ternary or quaternary compositions of nanoparticles for solar cells. Yet it is well known from thin film solar cell studies that such compositional tuning can sometimes yield significant improvements in performance.…”

mentioning

confidence: 99%

Photovoltaic Devices Employing Ternary PbS_xSe_1-x Nanocrystals

et al. 2009

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We report solar cells based on highly confined nanocrystals of the ternary compound PbS x Se 1-x . Crystalline, monodisperse alloyed nanocrystals are obtained using a one-pot, hot injection reaction. Rutherford back scattering and energy filtered transmission electron microscopy suggest that the S and Se anions are uniformly distributed in the alloy nanoparticles. Photovoltaic devices made using ternary nanoparticles are more efficient than either pure PbS or pure PbSe based nanocrystal devices.

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Nanocrystalline TiO₂ Solar Cells Sensitized with InAs Quantum Dots

Cited by 457 publications

References 35 publications

Electron Injection from a CdS Quantum Dot to a TiO<sub>2</sub> Conduction Band as an Efficiency Limiting Process: Comparison of QD Depositions between SILAR and Linker Assisted Attachment

Electron Injection from a CdS Quantum Dot to a TiO<sub>2</sub> Conduction Band as an Efficiency Limiting Process: Comparison of QD Depositions between SILAR and Linker Assisted Attachment

Self-energy and excitonic effects in the electronic and optical properties ofTiO2crystalline phases

Photovoltaic Devices Employing Ternary PbS_xSe_1-x Nanocrystals

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Nanocrystalline TiO2 Solar Cells Sensitized with InAs Quantum Dots

Cited by 457 publications

References 35 publications

Electron Injection from a CdS Quantum Dot to a TiO<sub>2</sub> Conduction Band as an Efficiency Limiting Process: Comparison of QD Depositions between SILAR and Linker Assisted Attachment

Electron Injection from a CdS Quantum Dot to a TiO<sub>2</sub> Conduction Band as an Efficiency Limiting Process: Comparison of QD Depositions between SILAR and Linker Assisted Attachment

Self-energy and excitonic effects in the electronic and optical properties ofTiO2crystalline phases

Photovoltaic Devices Employing Ternary PbSxSe1-x Nanocrystals

Contact Info

Product

Resources

About

Nanocrystalline TiO₂ Solar Cells Sensitized with InAs Quantum Dots

Photovoltaic Devices Employing Ternary PbS_xSe_1-x Nanocrystals