CdSe quantum dots sensitized ZnO nanorods for solar cell application

Pandi, D. Vinoth; Muthukumarasamy, N.; Agilan, S.; Velauthapillai, Dhayalan

doi:10.1016/j.matlet.2018.04.022

Cited by 29 publications

(11 citation statements)

References 31 publications

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“…[3] QD sensitizers show several advantages such as a tunable absorption spectra [4] and the possibility of breaking the Shockley-Queisser efficiency limit of p-n junction photovoltaic solar cells [5] via multiple exciton generation (MEG) and hot carrier collection. [6] CdSe nanoparticles of different shapes, including QDs, have been widely used to efficiently sensitize ZnO and TiO2 nanostructures for photovoltaic [7] and catalytic applications [8]. In a recent work, we have demonstrated the successful incorporation of quasi-two dimensional (2D) CdSe nanoplatelets (NPLs) into solar cells.…”

Section: Introductionmentioning

confidence: 99%

Ligand exchange on CdSe nanoplatelets for the solar light sensitization of TiO2 and ZnO nanorod arrays

Szemjonov

Tasso

Ithurria

et al. 2019

Journal of Photochemistry and Photobiology A: Chemistry

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In quantum dot (QD) solar cells, the ex situ sensitization of wide band gap semiconductors (WBSCs) makes it possible to control the shape and the passivation of the nanosized sensitizer. Hence, ex situ techniques can be used to investigate how the band gap of the sensitizers affects the performance of quantum dot solar cells. The latter can be precisely controlled in 1D confined structures such as quasi-2D nanoplatelets (NPLs), the thickness of which is defined with an atomic precision. In this work, we tested and thoroughly characterized the attachment of 7, 9 and 11 monolayers thick CdSe NPLs (as well as QDs for the sake of comparison) to ZnO and to TiO2 nanorods. A crucial point of the ex situ techniques is the choice of bifunctional ligands that link the nanosized sensitizers to the WBSCs. Besides the well-known mercaptopropionic acid, we also studied two 'atomic linkers' (OHand SH-) to minimize the distance between the sensitizer and the oxide. The asprepared systems have been analyzed by UV/VIS absorption and Raman spectroscopy.

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Section: Introductionmentioning

confidence: 99%

Ligand exchange on CdSe nanoplatelets for the solar light sensitization of TiO2 and ZnO nanorod arrays

Szemjonov

Tasso

Ithurria

et al. 2019

Journal of Photochemistry and Photobiology A: Chemistry

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“…As a commonly used QDs, CdSe (band gap: 1.75 eV) has a higher conduction band edge and excellent light absorption in visible light region, which makes it easier for excited electrons to be injected into ZnO 116 . Pandi et al 117 sensitized CdSe QDs on ZnO NRs by continuous ion layer adsorption reaction. Because photogenerated carriers are separated only in a relatively narrow area near the interface, the solar cell with planar structure is not conducive to the absorption of sunlight and the collection of photo‐generated carriers.…”

Section: Application Of Zno Nrs Heterojunction Arrays In Solar Cellsmentioning

confidence: 99%

Design strategies of ZnO heterojunction arrays towards effective photovoltaic applications

et al. 2022

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ZnO nanorods (NRs) heterojunction arrays have been widely used in photovoltaic cells owing to the outstanding photoelectrical chracteristics, high stability and low cost. The NRs arrays structure can integrate multiple functional components, so that it can exhibit more excellent physical and chemical properties that even independent components do not possess. The design of heterojunction nanostructures can effectively solve the problems of light absorption and carrier transport. First, the synthesis methods of ZnO NRs and their heterojunction arrays were systematically introduced, including traditional chemical vapor deposition (CVD), electrodeposition, hydrothermal method, and so on, the different structures and properties of ZnO NRs heterojunctions were analyzed. Then, the selected materials could be further processed and assembled into NRs array heterojunction with integrated functions were discussed. The strategies of maximizing energy conversion performance (structure optimization, heterojunction, surface plasmon resonance, and doping) were emphatically summarized. In addition, the research progress of ZnO NRs and their heterojunctions in photoelectric energy conversion system were summarized, and the application potential of combining nanostructure design with solar cells was summarized. Finally, the challenges and future development prospects of ZnO NRs and their heterojunction arrays in photovoltaic conversion were pointed out.

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“…quantum dots (QDs) have demonstrated significant potential in light-emitting devices and photovoltaic applications due to their unique intrinsic properties. [3,[21][22][23][24][25] In particular, PbS QDs with tunable band gaps have attracted attention owing to their solutionprocessability, utilization of earth-abundant raw materials, and the phenomenon of multiple exciton generation. [26][27][28] It was reported that hetero-nucleation is beneficial for the crystallization process in solution systems.…”

Section: Introductionmentioning

confidence: 99%

Facile Synthesis of Large Bulk Crystal Based on Perovskite‐Quantum Dots Hybrid Structure

Han,

Zhao,

Wang

et al. 2023

Cryst. Res. Technol.

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In this study, the fabrication of a large bulk crystal based on the hybrid structure of CH3NH3PbBr3 (MAPBr) and PbS quantum dots (QDs) with excellent crystal lattice match using an in situ epitaxial crystallization technique is presented. The hybrid bulk crystal is successfully constructed by uniformly dispersing PbS QDs within the MAPBr matrix. The crystalline growth method is also changed to achieve the desired hybrid structure. The light emission range is modulated and the light emission lifetime is prolonged by constructing a MAPBr‐PbS hybrid structure. Additionally, the hybrid bulk crystal exhibited an up‐conversion effect, which does not appear in MAPBr single crystal. These findings highlight the promising potential of the MAPBr‐PbS QDs hybrid bulk crystal in the fields of optics and photoelectronic, such as all solid‐state lasers, bio‐imaging, optical data storage, and photovoltaic applications. This in situ hybrid crystallization technique also provides a universal pathway for the preparation of other bulk crystals based on perovskite‐QDs hybrid structures.

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CdSe quantum dots sensitized ZnO nanorods for solar cell application

Cited by 29 publications

References 31 publications

Ligand exchange on CdSe nanoplatelets for the solar light sensitization of TiO2 and ZnO nanorod arrays

Ligand exchange on CdSe nanoplatelets for the solar light sensitization of TiO2 and ZnO nanorod arrays

Design strategies of ZnO heterojunction arrays towards effective photovoltaic applications

Facile Synthesis of Large Bulk Crystal Based on Perovskite‐Quantum Dots Hybrid Structure

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