Fabrication of CuInTe2 and CuInTe2–xSex Ternary Gradient Quantum Dots and Their Application to Solar Cells

Kim, Sung Woo; Kang, Meejae; Kim, Seajin; Heo, Jin Hyuk; Noh, Jun Hong; Im, Sang Hyuk; Seok, Sang Il; Kim, Sang Wook

doi:10.1021/nn401274e

Cited by 88 publications

(81 citation statements)

References 56 publications

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“…One potentially attractive, yet not well-studied, copper-based material is CuFeSe 2 , which represents a well-known class of I-III-VI 2 group ternary chalcogenides. Among the I-III-VI 2 group, such as CuInS 2 [22,23,24], CuInSe 2 [24,25,26], CuInTe 2 [27] and CuFeS 2 [24,28,29,30], materials have attracted extensive attention due to their high absorption coefficient, high conversion efficiency, low toxicity and other physical properties and unique chemical properties and have been explored for the fabrication of photovoltaic solar cells in very recent years. However, among these, less attention been paid to the CuFeSe 2 material, as eskebornite with a narrow band gap of 0.16 eV belongs to the tetragonal structure type [31] and the crystal structure of the CuFeSe 2 has the space group P

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2c with cell parameters a = 5.521 Å and c = 11.04 Å [32].…”

Section: Introductionmentioning

confidence: 99%

Colloidal Synthesis and Thermoelectric Properties of CuFeSe2 Nanocrystals

et al. 2017

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Copper-based chalcogenides that contain abundant, low-cost and environmentally-friendly elements, are excellent materials for numerous energy conversion applications, such as photocatalysis, photovoltaics, photoelectricity and thermoelectrics (TE). Here, we present a high-yield and upscalable colloidal synthesis route for the production of monodisperse ternary I-III-VI2 chalcogenides nanocrystals (NCs), particularly stannite CuFeSe2, with uniform shape and narrow size distributions by using selenium powder as the anion precursor and CuCl2·2H2O and FeCl3 as the cationic precursors. The composition, the state of valence, size and morphology of the CuFeSe2 materials were examined by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscope (SEM), transmission electron microscope (TEM) and high resolution transmission electron microscope (HRTEM), respectively. Furthermore, the TE properties characterization of these dense nanomaterials compacted from monodisperse CuFeSe2 NCs by hot press at 623 K were preliminarily studied after ligand removal by means of hydrazine and hexane solution. The TE performances of the sintered CuFeSe2 pellets were characterized in the temperature range from room temperature to 653 K. Finally, the dimensionless TE figure of merit (ZT) of this Earth-abundant and intrinsic p-type CuFeSe2 NCs is significantly increased to 0.22 at 653 K in this work, which is demonstrated to show a promising TE materialand makes it a possible p-type candidate for medium-temperature TE applications.

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\overset{4}{true}

2c with cell parameters a = 5.521 Å and c = 11.04 Å [32].…”

Section: Introductionmentioning

confidence: 99%

Colloidal Synthesis and Thermoelectric Properties of CuFeSe2 Nanocrystals

et al. 2017

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“…133 Besides the above mentioned type I, type II, and inverted type I core/shell QDs, there is a kind of gradient alloyed QDs in which the element transition is not abrupt in the QDs. 134 Kim et al 133 reported a simple hot injection method to synthesize the colloidal CuInTe 2−x Se x gradient alloyed QDs with the highest selenium content at the surface of the applications to solar cells. …”

Section: Surface Passivationmentioning

confidence: 99%

Recent progress on quantum dot solar cells: a review

2016

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Abstract. Semiconductor quantum dots (QDs) have a potential to increase the power conversion efficiency in photovoltaic operation because of the enhancement of photoexcitation. Recent advances in self-assembled QD solar cells (QDSCs) and colloidal QDSCs are reviewed, with a focus on understanding carrier dynamics. For intermediate-band solar cells using selfassembled QDs, suppression of a reduction of open circuit voltage presents challenges for further efficiency improvement. This reduction mechanism is discussed based on recent reports. In QD sensitized cells and QD heterojunction cells using colloidal QDs well-controlled heterointerface and surface passivation are key issues for enhancement of photovoltaic performances. The improved performances of colloidal QDSCs are presented. © The Authors. Published by SPIE under a Creative Commons Attribution 3.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI.

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“…Synthesis and function optimization of nanostructured I‐III‐VI2 chalcopyrite materials including CuInTe 2 have been extensively studied. Researchers have prepared different types of CuInTe 2 nanostructures including nanoplates, quantum dots and nanocubes . However, preparation of well‐aligned CuInTe 2 nanowires has not been reported to the best of our knowledge.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of CuInTe₂ nanowires: A polycrystalline‐to‐single‐crystalline transformation process

2018

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A facile solvothermal synthetic route has been developed to prepare CuInTe2 nanowires with the template aiding of anodic aluminum oxide. Microstructure analysis reveals that the as‐prepared single crystalline CuInTe2 nanowires have a [112] direction preferential growth. Oriented attachment mechanism has been proposed to explain the anisotropic growth of CuInTe2 nanowires during a polycrystalline‐to‐single‐crystalline transformation process. CuInTe2 nanowires have strong absorption in the visible region based on UV‐Vis absorption spectra measurement, confirming its suitability as a light absorbing material in solar cells.

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Fabrication of CuInTe₂ and CuInTe_2–xSe_x Ternary Gradient Quantum Dots and Their Application to Solar Cells

Cited by 88 publications

References 56 publications

Colloidal Synthesis and Thermoelectric Properties of CuFeSe2 Nanocrystals

Colloidal Synthesis and Thermoelectric Properties of CuFeSe2 Nanocrystals

Recent progress on quantum dot solar cells: a review

Synthesis of CuInTe₂ nanowires: A polycrystalline‐to‐single‐crystalline transformation process

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Fabrication of CuInTe2 and CuInTe2–xSex Ternary Gradient Quantum Dots and Their Application to Solar Cells

Cited by 88 publications

References 56 publications

Colloidal Synthesis and Thermoelectric Properties of CuFeSe2 Nanocrystals

Colloidal Synthesis and Thermoelectric Properties of CuFeSe2 Nanocrystals

Recent progress on quantum dot solar cells: a review

Synthesis of CuInTe2 nanowires: A polycrystalline‐to‐single‐crystalline transformation process

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Fabrication of CuInTe₂ and CuInTe_2–xSe_x Ternary Gradient Quantum Dots and Their Application to Solar Cells

Synthesis of CuInTe₂ nanowires: A polycrystalline‐to‐single‐crystalline transformation process