Optical absorption study of P3HT:PCBM blend photo-oxidation for bulk heterojunction solar cells

Müllerová, Jarmila; Kaiser, Michal; Nádaždy, Vojtěch; Šiffalovič, Peter; Majková, E.

doi:10.1016/j.solener.2016.05.009

Cited by 37 publications

(13 citation statements)

References 44 publications

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“…The peak at 510 nm is assigned to the intrachain π–π transitions of P3HT blocks. The two vibronic shoulders at 550 nm and 603 nm can be attributed to the π–π stacking structure of P3HT [ 38 , 39 ]. In general, the optical absorption intensity of a conjugated polymer increases with increasing crystallinity and conjugation chain length [ 40 ].…”

Section: Resultsmentioning

confidence: 99%

Improving Photovoltaic Properties of P3HT:IC60BA through the Incorporation of Small Molecules

Saianand

Gopalan

et al. 2018

Polymers

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Abstract:We investigated the role of a functional solid additive, 2,3-dihydroxypyridine (DHP), in influencing the optoelectronic, morphological, structural and photovoltaic properties of bulk-heterojunction-based polymer solar cells (BHJ PSCs) fabricated using poly(3-hexylthiophene): indene-C 60 bisadduct (P3HT:IC 60 BA) photoactive medium. A dramatic increase in the power conversion efficiency (~20%) was witnessed for the BHJ PSCs treated with DHP compared to the pristine devices. A plausible explanation describing the alignment of pyridine moieties of DHP with the indene side groups of IC 60 BA is presented with a view to improving the performance of the BHJ PSCs via improved crystalline order and hydrophobicity changes.

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Section: Resultsmentioning

confidence: 99%

Improving Photovoltaic Properties of P3HT:IC60BA through the Incorporation of Small Molecules

Saianand

Gopalan

et al. 2018

Polymers

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“…[ 49–51 ] The earliest studies on organic‐based PEC devices mainly focused on the use of regioregular poly(3‐hexylthiophene) (rr‐P3HT) [ 52,53 ] as well as the donor/acceptor blend rr‐P3HT:phenyl‐C 61 ‐butyric acid methyl ester (PCBM), [ 54–56 ] taking advantage of the knowledge acquired in bulk heterojunction (BHJ) organic photovoltaics. [ 51,57 ] Indeed, rr‐P3HT:PCBM has intriguing properties for water‐splitting applications, including a direct bandgap of ≈ 1.9 eV of the rr‐P3HT (close to the value needed for the maximum

η_{STH}

of 21.6% in tandem PEC configurations), [ 23,55,58,59 ] a high absorption coefficient ( ≈ 10 4 cm −1 ), [ 60–62 ] and the lowest unoccupied molecular orbital (LUMO) of PCBM (LUMO PCBM ) more positive than the

E_{{normalH}^{+} / {normalH}_{2}}^{0}

(LUMO PCBM –

E_{{normalH}^{+} / {normalH}_{2}}^{0}

> −0.5 V) to conduct the HER process through photogenerated electrons [ 59 ] and stability in aqueous environments. [ 63–69 ] The rr‐P3HT:PCBM photocathodes are fabricated using a similar architecture to BHJ solar cells: [ 59 ] a transparent conductive oxide (TCO), e.g., fluorine‐doped tin oxide (FTO), is covered by a hole transporting layer (HTL) on top of which the light harvester is deposited and then covered by an electron transporting layer (ETL).…”

Section: Introductionmentioning

confidence: 99%

Hybrid Organic/Inorganic Photocathodes Based on WS₂ Flakes as Hole Transporting Layer Material

et al. 2020

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The efficient production of molecular hydrogen (H2) is a fundamental step toward an environmentally friendly economy. Photocathodes using organic bulk heterojunction (BHJ) films as light harvesters represent an attracting technology for low‐cost photoelectrochemical water splitting. These photocathodes need charge transporting layers (CTLs) to efficiently separate and transport either holes or electrons toward the back‐current collector and electrolyte, respectively. Therefore, it is pivotal to control the energy band edge levels and the work function (WF) of the CTLs to match the ones of the BHJ film, current collector, and electrolyte. Herein, the use of 2D p‐doped WS2 flakes as hole transporting material for H2‐evolving photocathodes based on the regioregular poly(3‐hexylthiophene):phenyl‐C61‐butyric acid methyl ester (rr‐P3HT:PCBM) BHJ film is proposed. The WS2 flakes are produced through scalable liquid‐phase exfoliation of the bulk crystal, whereas p‐type chemical doping allows the tuning of the WS2 WF. This approach boosts the performances of the photocathodes, reaching photocurrent densities up to 4.14 mA cm−2 at 0 V versus reversible hydrogen electrode (RHE), an onset potential of 0.66 V versus RHE, and a ratiometric power‐saved metric of 1.28% (under 1 sun illumination). To the best of the authors' knowledge, these performances represent the current record for 2D materials‐based CTLs.

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“…Therefore, it can be stated that there is a correlation between the optical properties and the electrical parameters of OSC. 55 The crystallinity of active layer is important for improving device performance since it does not hinder the charge transport. 56 Therefore, to investigate the crystallinity of non- The mean size of these films crystallite were extracted from Scherrer equation which are also summarized in Table 1.…”

Section: Optical and Morphological Characterization Of Organic Photoactive Layermentioning

confidence: 99%

The hydrothermal synthesis of blue-emitting boron-doped CQDs and its application for improving the photovoltaic parameters of organic solar cell

2021

Turk J Chem

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In this work, boron-doped CQDs (B-CQDs) were synthesized by using boric acid, urea, and citric acid via hydrothermal method to use as a novel additive material for poly(3-hexylthiophene-2,5-diyl) (P3HT):[6,6]-phenyl-C61-butyric acid methyl ester (PCBM) based organic solar cells. The OSCs with an inverted device structure were fabricated on titanium dioxide (TiO2) thin film. It was showed the crystallinity, morphological and optical properties of P3HT:PCBM films improved after B-CQDs additive. The best performance was obtained to be a 39.65% of FF, a 546 mV of Voc, an 8.606 mA cm -2 of Jsc after 3 vol.% B-CQDs addition in P3HT:PCBM blend. The power conversion efficiency (PCE) enhanced from 1.72% (non-doped device) to 2.33% (3% of B-CQDs) (a ~ 35% increase). The obtained results provided that B-CQDs are promising materials to improve the performance of solar cell applications. The novelty of this work is to improve the performance of OSCs using cost-effective and eco-friendly Boron CQDs as an additive. Besides achieved a good PCE of OSCs, it is necessary for utilized clean and green energy.

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Optical absorption study of P3HT:PCBM blend photo-oxidation for bulk heterojunction solar cells

Cited by 37 publications

References 44 publications

Improving Photovoltaic Properties of P3HT:IC60BA through the Incorporation of Small Molecules

Improving Photovoltaic Properties of P3HT:IC60BA through the Incorporation of Small Molecules

Hybrid Organic/Inorganic Photocathodes Based on WS₂ Flakes as Hole Transporting Layer Material

The hydrothermal synthesis of blue-emitting boron-doped CQDs and its application for improving the photovoltaic parameters of organic solar cell

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Optical absorption study of P3HT:PCBM blend photo-oxidation for bulk heterojunction solar cells

Cited by 37 publications

References 44 publications

Improving Photovoltaic Properties of P3HT:IC60BA through the Incorporation of Small Molecules

Improving Photovoltaic Properties of P3HT:IC60BA through the Incorporation of Small Molecules

Hybrid Organic/Inorganic Photocathodes Based on WS2 Flakes as Hole Transporting Layer Material

The hydrothermal synthesis of blue-emitting boron-doped CQDs and its application for improving the photovoltaic parameters of organic solar cell

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Hybrid Organic/Inorganic Photocathodes Based on WS₂ Flakes as Hole Transporting Layer Material