Surfactant-free CdTe nanoparticles mixed MEH-PPV hybrid solar cell deposited by spin coating technique

Verma, Deepak; Rao, A. Ranga; Dutta, Viresh

doi:10.1016/j.solmat.2009.03.030

Cited by 74 publications

(27 citation statements)

References 38 publications

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“…Each kinetic curve which can be fitted by a sum of two exponentials displays a similar behavior, a fast decay component (~100 fs) and a slow decay component (~1000 fs). The two components correspond to the dephasing time and popula- Table 1 Signal wave vector, pulse sequence and response function for third-order nonlinear spectroscopy a) Signal wave vector k 4 Initial pulse Response function 5 , and R 8 describe the photon echo process, and R 2 , R 3 , R 6 , and R 7 describe the FID process. According to Table 1, for τ 12 =75 fs, the rephasing contribution is dominant in the signal and the visible quantum Figures 4(c) and 4(f).…”

Section: Resultsmentioning

confidence: 99%

“…The conjugated polymer materials are attracting growing attention because of their importance in the photoelectronic area [1][2][3][4][5][6][7][8][9]. The conjugated polymer materials have a wide range of properties and can be processed into solution or films via chemical synthesis.…”

Section: Introductionmentioning

confidence: 99%

“…Moreover the MEH-PPV can be a crucial component of composites in some optoelectronic devices. The photovoltaic cells based on the MEH-PPV/Fullerene (C 60 ) composites and the MEH-PPV/ CdTe composites have been taken as potential sources of renewable electrical energy [3][4][5]. In addition, the nanofibers of blends with MEH-PPV and other polymers, such as poly-(3-hexylthiophene) (PHT) and poly-(9, 9-dioctylfluorene) (PFO), have tunable, optical and electronic properties that can be exploited in field-effect transistors [6,7].…”

Section: Introductionmentioning

confidence: 99%

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Coherent coupling of vibrational states in the MEH-PPV film investigated through Multi-Color Photon Echo

Song

Wang

et al. 2010

Sci. China Phys. Mech. Astron.

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The poly-[2-methoxy, (5-2′-ethyl-hexyloxy)-p-phenylene vinylene] (MEH-PPV) film is investigated by means of the Multi-Color Photon Echo (MCPE) technique. Under the three-order nonlinear response theory, the reason for the occurrence of the quantum beats in the time domain and the relations among signal wavevector, pulse sequence and response function are discussed. The analysis of the Raman spectrum of MEH-PPV and the fast Fourier transformation (FFT) results of photon echo (PE) signal dynamics demonstrate the coherent coupling between the C==C bonds and the CC-H bonds and the coherent coupling between the C-C stretching of the phenyl group and the C==C stretching of the vinylene group. MCPE, quantum beats, coherent coupling PACS: 34.50.Ez, 42.50.Md, 42.70.Jk

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Coherent coupling of vibrational states in the MEH-PPV film investigated through Multi-Color Photon Echo

Song

Wang

et al. 2010

Sci. China Phys. Mech. Astron.

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“…, which tends to dissolve the alkyl side chains better than the aromatic backbone, was used for sample preparation [26]. MEH-PPV is a well-studied polymer with a 1 H NMR spectrum that has been extensively catalogued [27][28][29].…”

Section: Figurementioning

confidence: 99%

Effects of Emulsion-Based Resonant Infrared Matrix Assisted Pulsed Laser Evaporation (RIR-MAPLE) on the Molecular Weight of Polymers

2012

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Abstract:The molecular weight of a polymer determines key optoelectronic device characteristics, such as internal morphology and charge transport. Therefore, it is important to ensure that polymer deposition techniques do not significantly alter the native polymer molecular weight. This work addresses polymers deposited by resonant infrared matrix-assisted pulsed laser evaporation (RIR-MAPLE). By using a novel emulsion-based target technique, the deposition of smooth, contiguous films with no evidence of chemical degradation have been enabled. However, structural degradation via a reduction in molecular weight remains an open question. The common polymer standard, PMMA, and the optoelectronic polymers, P3HT and MEH-PPV, have been characterized before and after emulsion-based RIR-MAPLE deposition via gel permeation chromatography to determine if RIR-MAPLE affects the deposited polymer molecular weight. Proton nuclear magnetic resonance spectroscopy and Fourier transform infrared spectroscopy measurements have also been conducted to verify the absence of chemical degradation. These measurements verify that there is no chemical degradation of the polymers, and that PMMA and P3HT show no structural degradation, but MEH-PPV exhibits a halving of the weight-averaged molecular weight after RIR-MAPLE deposition. Compared with competing laser deposition techniques, RIR-MAPLE is shown to have the least effect on the molecular weight of the resulting thin films. OPEN ACCESSPolymers 2012, 4 342

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“…It is therefore desirable to make low cost small molecule based OPVs by solution processing. Due to the limited solubility, surfactants are usually necessary to dissolve small organic molecules, which would decrease the conductivity, resulting from the presence of surfactants blocking the electron/hole transport [5], thus affecting negatively the performance of small molecule based OPVs.…”

Section: Open Accessmentioning

confidence: 99%

Phase and Texture of Solution-Processed Copper Phthalocyanine Thin Films Investigated by Two-Dimensional Grazing Incidence X-Ray Diffraction

et al. 2011

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Abstract:The phase and texture of a newly developed solution-processed copper phthalocyanine (CuPc) thin film have been investigated by two-dimensional grazing incidence X-ray diffraction. The results show that it has β phase crystalline structure, with crystallinity greater than 80%. The average size of the crystallites is found to be about 24 nm. There are two different arrangements of crystallites, with one dominating the diffraction pattern. Both of them have preferred orientation along the thin film normal. Based on the similarities to the vacuum deposited CuPc thin films, the new solution processing method is verified to offer a good alternative to vacuum process, for the fabrication of low cost small molecule based organic photovoltaics.

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Surfactant-free CdTe nanoparticles mixed MEH-PPV hybrid solar cell deposited by spin coating technique

Cited by 74 publications

References 38 publications

Coherent coupling of vibrational states in the MEH-PPV film investigated through Multi-Color Photon Echo

Coherent coupling of vibrational states in the MEH-PPV film investigated through Multi-Color Photon Echo

Effects of Emulsion-Based Resonant Infrared Matrix Assisted Pulsed Laser Evaporation (RIR-MAPLE) on the Molecular Weight of Polymers

Phase and Texture of Solution-Processed Copper Phthalocyanine Thin Films Investigated by Two-Dimensional Grazing Incidence X-Ray Diffraction

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