Photovoltaic Characteristics of Phthalocyanine-Polysilane Composite Films

Haga, Yutaka; Harada, Yuto

doi:10.1143/jjap.40.855

Cited by 28 publications

(13 citation statements)

References 25 publications

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“…This polymer dissolves well in nonpolar solvents, and when sprinkled from solutions forms high-quality films which are used as transport or active light-emitting layers of electroluminescent diodes [6-8]. PMPS and its copolymers have been used to develop electrophotographic layers for xerography [9], recording media for data storage by the photorefractive method [10], and binders for photovoltaic devices [11]. Moreover, irradiation of PMPS with light in the band for the S 1 ← S 0 transition (from the S 0 ground state to the first excited singlet S 1 state) causes degradation of the polymer, which is enhanced as the temperature rises.…”

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confidence: 99%

Effect of pyrene and acetophenone on photostability of poly(methylphenylsilane) films

Skryshevskiĭ

2007

J Appl Spectrosc

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We have used investigations of low-temperature photoluminescence and thermally stimulated luminescence to study the effect of acetophenone and pyrene dopants on the photochemical stability of poly(methylphenylsilane) (PMPS) films. We have established that pure PMPS films and acetophenone-doped PMPS films degrade on exposure to UV radiation due to breaking of Si-Si bonds followed by formation of crosslinks between the macromolecules. At the same time, pyrene inhibits degradation of PMPS to a significant extent. This proves that photoinduced breaking of the Si-Si bond can occur upon excitation of the macromolecule to the first triplet T 1 (σσ * ) state, since acetophenone sensitizes while pyrene quenches the intrinsic phosphorescence of PMPS. So the photochemical stability of PMPS can be improved by introducing a dopant which quenches triplet excitations of the macromolecule. Introduction.Polysilanes are linear organosilicon polymers in which the backbones of the macromolecules are formed by σ-bonded silicon atoms with two added organic groups. These compounds are characterized by strong absorption in the near UV region of the spectrum, high fluorescence and charge carrier photogeneration quantum yields, high mobility of holes, and the presence of nonlinear optical properties [1-3]. The chromophores in polysilanes are segments of the macromolecular backbone within which the Si-Si σ electrons are delocalized. The segments have different lengths and are separated by conformational defects formed at inflection points in the backbone. With an increase in the number of Si atoms in the segment and accordingly an increase in its length, the energies of the excited states and the ionization potential of the segment are lowered [1,4,5].PMPS is a typical representative of the considered class of polymers. This polymer dissolves well in nonpolar solvents, and when sprinkled from solutions forms high-quality films which are used as transport or active light-emitting layers of electroluminescent diodes [6-8]. PMPS and its copolymers have been used to develop electrophotographic layers for xerography [9], recording media for data storage by the photorefractive method [10], and binders for photovoltaic devices [11]. Moreover, irradiation of PMPS with light in the band for the S 1 ← S 0 transition (from the S 0 ground state to the first excited singlet S 1 state) causes degradation of the polymer, which is enhanced as the temperature rises. Degradation begins with breaking of the Si-Si bond. Then crosslinks are formed between macromolecules, cyclic structures are formed, and when irradiated by light in air compounds are formed containing Si-O-Si, Si-H, and Si-OH bonds [1,12,13]. Therefore PMPS and its copolymers are used as photoresists for microlithography [1,12] and also as precursors in making interface microlenses [14] and forming hybrid polysilane-silica films with controllable refractive index [15].In order to improve the photogeneration and electrically conductive properties, aromatic compounds are introduced into PMPS as d...

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confidence: 99%

Effect of pyrene and acetophenone on photostability of poly(methylphenylsilane) films

Skryshevskiĭ

2007

J Appl Spectrosc

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“…Polysilanes are promising candidates for the alternate hole transport materials because they are one-dimensional silicon-based materials [19] [20], and can provide good electrical, optical and photovoltaic properties [21] [22] [23] [24].…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Perovskite-Type Photovoltaic Devices with Polysilane Hole Transport Layers

Shirahata¹,

Oku²,

Fukunishi³

et al. 2017

MSA

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Perovskite-type photovoltaic devices with polysilane hole transport layers were fabricated by a spin-coating method. In the present work, poly(methyl phenylsilane) (PMPS) and decaphenylcyclopentasilane (DPPS) were used as the hole transport layers. First, structural and optical properties of the PMPS and DPPS films were investigated, and the as-prepared PMPS and DPPS films were amorphous. Optical absorption spectra of the amorphous PMPS and DPPS showed some marked features due to the nature of polysilanes. Then, microstructures, optical and photovoltaic properties of the perovskite-type photovoltaic devices with polysilane hole transport layers were investigated. Current density-voltage characteristics and incident photon to current conversion efficiency of the photovoltaic devices with the polysilane layers showed different photovoltaic performance each other, attributed to molecular structures of the polysilanes and Si content in the present hole transport layers.

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“…Polysilanes have a high hole mobility as organic semiconductors because of its σ-conjugated polymers, and it is possible to use the materials for organic thin film solar cells. Although the polysilanes could be applied to p-type semiconductors for organic thin film solar cells [1][2][3], few studies on polysilane-based solar cells have been reported [4,5]. On the other hand, polysilanes formed amorphous silicon when annealed at high temperatures.…”

Section: Introductionmentioning

confidence: 99%

Fabrication and Characterization of Poly[Decaphenylcyclopentasilane]-Based Solar Cells

Iwase¹,

Oku

Suzuki³

et al. 2012

AMPC

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Poly[decaphenylcyclopentasilane] (PDPS)-based photovoltaic cells were fabricated by using mixture solution of PDPS including boron and phosphorous elements. A doping effect of phosphorus and boron into PDPS was investigated on the performance of the photovoltaic devices. The solar cell provided short-circuit current density of 0.11 mA/cm 2 and open-circuit voltage of 0.81 V under simulated sunlight. Microstructural analysis indicated that PDPS had an amorphous structure, which would result in the photovoltaic properties.

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Photovoltaic Characteristics of Phthalocyanine-Polysilane Composite Films

Cited by 28 publications

References 25 publications

Effect of pyrene and acetophenone on photostability of poly(methylphenylsilane) films

Effect of pyrene and acetophenone on photostability of poly(methylphenylsilane) films

Fabrication of Perovskite-Type Photovoltaic Devices with Polysilane Hole Transport Layers

Fabrication and Characterization of Poly[Decaphenylcyclopentasilane]-Based Solar Cells

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