Synthesis and electrochemical properties of InP nanocrystals

In this report, we present a new organometallic synthetic method to prepare nearly monodisperse InP nanoparticles using indium trifluoroacetate as the In precursor. Spherical particles of various sizes were prepared by modulating the growth duration. The optical and electrochemical properties were investigated and discussed with reference to band edge positions. This is the first report on the band edge position of quantum confined InP nanoparticles, which is a key parameter for development of electro-optic devices like solar cells and light-emitting diodes based on it.

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Synthesis of Poly[(3-(6-(9-anthracenylmethoxy)hexyl)thiophene)-co-(3-(6-bromohexyl)thiophene)] Postfunctionalized from Poly(3-(6-bromohexyl)thiophene): A Comparative Study of the Base Polymer with Its Chlorinated Analogous

International Journal of Polymer Science ◽

10.1155/2009/974307 ◽

2009 ◽

Vol 2009 ◽

pp. 1-7

Author(s):

F. R. Díaz-Alzamora ◽

M. A. del Valle ◽

C. M. Núñez ◽

P. P. Zamora ◽

J. P. Soto ◽

...

Keyword(s):

Solar Cells ◽

Comparative Study ◽

Light Emitting Diodes ◽

Electronic Devices ◽

Synthetic Method ◽

Light Emitting ◽

Absorption And Emission ◽

Emission Properties ◽

Base Polymer ◽

Resultant Material

A synthetic method based on the postfunctionalization of a reactive homopolymer precursor, which allows for the preparation of different copolymers derived from poly(3-alkylthiophene), was studied. Although these groups decrease the solubility of the resultant material, they enable controlling the degree of substitution to obtain a material with improved spectroscopic (absorption and emission) properties making them useful for the fabrication of electronic devices, for example, solar cells and light-emitting diodes. Furthermore, a comparative study of two halogenated (Cl and Br) reactive poly(3-ω-haloalkyl)thiophenes was carried out.

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Photostable and Uniform CH3NH3PbI3 Perovskite Film Prepared via Stoichiometric Modification and Solvent Engineering

Nanomaterials ◽

10.3390/nano11020405 ◽

2021 ◽

Vol 11 (2) ◽

pp. 405

Author(s):

Daocheng Hong ◽

Mingyi Xie ◽

Yuxi Tian

Keyword(s):

Solar Cells ◽

Optoelectronic Devices ◽

Solvent Engineering ◽

Light Emitting ◽

Light Emitting Devices ◽

Coverage Ratio ◽

Fabrication Procedure ◽

Fabrication Condition ◽

Halide Perovskites ◽

Photoluminescence Efficiency

Solution-processed organometal halide perovskites (OMHPs) have been widely used in optoelectronic devices, and have exhibited brilliant performance. One of their generally recognized advantages is their easy fabrication procedure. However, such a procedure also brings uncertainty about the opto-electric properties of the final samples and devices, including morphology, stability, coverage ratio, and defect concentration. Normally, one needs to find a balanced condition, because there is a competitive relation between these parameters. In this work, we fabricated CH3NH3PbI3 films by carefully changing the ratio of the PbI2 to CH3NH3I, and found that the stoichiometric and solvent engineering not only determined the photoluminescence efficiency and defects in the materials, but also affected the photostability, morphology, and coverage ratio. Combining solvent engineering and the substitution of PbI2 by Pb(Ac)2, we obtained an optimized fabrication condition, providing uniform CH3NH3PbI3 films with both high photoluminescence efficiency and high photostability under either I-rich or Pb-rich conditions. These results provide an optimized fabrication procedure for CH3NH3PbI3 and other OMHP films, which is crucial for the performance of perovskite-based solar cells and light emitting devices.

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Application of quinoline derivatives in third-generation photovoltaics

Journal of Materials Science Materials in Electronics ◽

10.1007/s10854-021-06225-6 ◽

2021 ◽

Author(s):

Gabriela Lewinska ◽

Jerzy Sanetra ◽

Konstanty W. Marszalek

Keyword(s):

Solar Cells ◽

Polymer Solar Cells ◽

Energy Levels ◽

Photovoltaic Cells ◽

Third Generation ◽

Quinoline Derivatives ◽

Emission Layer ◽

Light Emitting ◽

Photovoltaic Applications ◽

Architecture And Design

AbstractAmong many chemical compounds synthesized for third-generation photovoltaic applications, quinoline derivatives have recently gained popularity. This work reviews the latest developments in the quinoline derivatives (metal complexes) for applications in the photovoltaic cells. Their properties for photovoltaic applications are detailed: absorption spectra, energy levels, and other achievements presented by the authors. We have also outlined various methods for testing the compounds for application. Finally, we present the implementation of quinoline derivatives in photovoltaic cells. Their architecture and design are described, and also, the performance for polymer solar cells and dye-synthesized solar cells was highlighted. We have described their performance and characteristics. We have also pointed out other, non-photovoltaic applications for quinoline derivatives. It has been demonstrated and described that quinoline derivatives are good materials for the emission layer of organic light-emitting diodes (OLEDs) and are also used in transistors. The compounds are also being considered as materials for biomedical applications.

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Light Emitting Perovskite Solar Cells – A Tale of Two States

Energy Technology ◽

10.1002/ente.202100394 ◽

2021 ◽

Author(s):

Yukta Yukta ◽

Soumitra Satapathi

Keyword(s):

Solar Cells ◽

Perovskite Solar Cells ◽

Light Emitting

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Recent Advances and Challenges in Halide Perovskite Crystals in Optoelectronic Devices from Solar Cells to Other Applications

Crystals ◽

10.3390/cryst11010039 ◽

2020 ◽

Vol 11 (1) ◽

pp. 39

Author(s):

Seunghyun Rhee ◽

Kunsik An ◽

Kyung-Tae Kang

Keyword(s):

Solar Cells ◽

Optoelectronic Devices ◽

Charge Carrier Mobility ◽

Light Emitting ◽

Fundamental Properties ◽

Perovskite Materials ◽

Hybrid Perovskite ◽

Band Position ◽

Different Characteristics ◽

High Charge Carrier Mobility

Organic-inorganic hybrid perovskite materials have attracted tremendous attention as a key material in various optoelectronic devices. Distinctive optoelectronic properties, such as a tunable energy band position, long carrier diffusion lengths, and high charge carrier mobility, have allowed rapid progress in various perovskite-based optoelectronic devices (solar cells, photodetectors, light emitting diodes (LEDs), and lasers). Interestingly, the developments of each field are based on different characteristics of perovskite materials which are suitable for their own applications. In this review, we provide the fundamental properties of perovskite materials and categorize the usages in various optoelectronic applications. In addition, the prerequisite factors for those applications are suggested to understand the recent progress of perovskite-based optoelectronic devices and the challenges that need to be solved for commercialization.

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Calculation of Band Offsets of Mg(OH)2-Based Heterostructures

Electronic Materials ◽

10.3390/electronicmat2030019 ◽

2021 ◽

Vol 2 (3) ◽

pp. 274-283

Author(s):

Masaya Ichimura

Keyword(s):

Solar Cells ◽

Valence Band ◽

Dye Sensitized Solar Cells ◽

Band Alignment ◽

First Principles Calculation ◽

Band Edge ◽

Level Energy ◽

Type I ◽

Valence Band Edge ◽

Generalized Gradient

The band alignment of Mg(OH)2-based heterostructures is investigated based on first-principles calculation. (111)-MgO/(0001)-Mg(OH)2 and (0001)-wurtzite ZnO/(0001)-Mg(OH)2 heterostructures are considered. The O 2s level energy is obtained for each O atom in the heterostructure supercell, and the band edge energies are evaluated following the procedure of the core-level spectroscopy. The calculation is based on the generalized gradient approximation with the on-site Coulomb interaction parameter U considered for Zn. For MgO/Mg(OH)2, the band alignment is of type II, and the valence band edge of MgO is higher by 1.6 eV than that of Mg(OH)2. For ZnO/Mg(OH)2, the band alignment is of type I, and the valence band edge of ZnO is higher by 0.5 eV than that of Mg(OH)2. Assuming the transitivity rule, it is expected that Mg(OH)2 can be used for certain types of heterostructure solar cells and dye-sensitized solar cells to improve the performance.

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Study of Nanostructured Polymeric Composites Used for Organic Light Emitting Diodes and Organic Solar Cells

Journal of Nanomaterials ◽

10.1155/2012/190290 ◽

2012 ◽

Vol 2012 ◽

pp. 1-6 ◽

Cited By ~ 5

Author(s):

Nguyen Nang Dinh ◽

Do Ngoc Chung ◽

Tran Thi Thao ◽

David Hui

Keyword(s):

Solar Cells ◽

Organic Solar Cells ◽

Light Emitting Diodes ◽

Hole Transport ◽

Organic Light Emitting Diodes ◽

Transport Layer ◽

Nanocomposite Films ◽

Hole Transport Layer ◽

Light Emitting ◽

Organic Light

Polymeric nanocomposite films from PEDOT and MEH-PPV embedded with surface modified TiO2nanoparticles for the hole transport layer and emission layer were prepared, respectively, for organic emitting diodes (OLEDs). The composite of MEH-PPV+nc-TiO2was used for organic solar cells (OSCs). The characterization of these nanocomposites and devices showed that electrical (I-Vcharacteristics) and spectroscopic (photoluminescent) properties of conjugate polymers were enhanced by the incorporation of nc-TiO2in the polymers. The organic light emitting diodes made from the nanocomposite films would exhibit a larger photonic efficiency and a longer lasting life. For the organic solar cells made from MEH-PPV+nc-TiO2composite, a fill factor reached a value of about 0.34. Under illumination by light with a power density of 50 mW/cm2, the photoelectrical conversion efficiency was about 0.15% corresponding to an open circuit voltageVoc= 0.126 V and a shortcut circuit current densityJsc= 1.18 mA/cm2.

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