Triazatruxene‐Diketopyrrolopyrrole Dumbbell‐Shaped Molecules as Photoactive Electron Donor for High‐Efficiency Solution Processed Organic Solar Cells

Bura, Thomas; Leclerc, Nicolas; Bechara, R.; Lévêque, P.; Heiser, T.; Ziessel, Raymond

doi:10.1002/aenm.201300240

Cited by 68 publications

(55 citation statements)

References 32 publications

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“…The idea was to use the TB 2 scaffold in order to obtain TAT‐BODIPY‐TAT arrangements. Incidentally, TAT‐dye‐TAT compounds have been subject of recurrent publications from this research team and showed promising results when exploring different central electron‐poor units such as DPP . The difference between BVT and BET lies in the conjugated linker used to connect TAT units with BODIPY at the 2‐ and 6‐positions.…”

Section: Bodipy In Bhjmentioning

confidence: 99%

Porphyrins and BODIPY as Building Blocks for Efficient Donor Materials in Bulk Heterojunction Solar Cells

et al. 2017

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International audienceAdvances in the synthesis and application of highly efficient polymers and small molecules over the last two decades have enabled the rapid advancement in the development of organic solar cells and photovoltaic technology as a promising alternative to conventional solar cells, based on silicon and other inorganic semiconducting materials. Among the different types of organic semiconducting materials, porphyrins and BODIPY-based small molecules and conjugated polymers attract high interest as efficient semiconducting organic materials for dye sensitized solar cells and bulk heterojunction organic solar cells. The highest power conversion efficiency exceeding 9% has been reported so far for porphyrin small molecules and 8.60% for conjugated polymers based on porphyrins. On the other hand, small molecules and conjugated polymers based on BODIPY moiety have been successfully used as donor materials for solution processed bulk heterojunction organic solar cells, and the resultant devices showed power conversion efficiencies exceeding 5.5%. In this article, the development of molecular design of porphyrins and BODIPY small molecules and polymers for bulk heterojunction organic solar cells are reviewed, and a guideline for the structure-performance relationship is provided

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Section: Bodipy In Bhjmentioning

confidence: 99%

Porphyrins and BODIPY as Building Blocks for Efficient Donor Materials in Bulk Heterojunction Solar Cells

et al. 2017

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“…It shows end-to-end π-π interactions in the solid phase and leads to favorable active layer morphologies with low ratios of fullerene acceptors. With a 1:0.75 2j:PC 70 BM weight ratio, solar cells demonstrated a high PCE of 5.3 % with a V OC of 0.63 V and J SC of 14.6 mA cm −2 after thermal annealing (110°C for 20 min) [33]. Using a naphthadithiophene donor group as the core and DPP as terminal arms, an alternative A-D-A (Acceptor-Donor-Acceptor) structure (2K) was employed by Marks et al Solar cells prepared from a 2K:PCBM (1.5:1.02) deliver a high PCE of 4.06 %, with a V OC of 0.84 V, J SC of 11.27 mA cm −2 , and FF of 0.42 by annealing at 110°C for 10 min [34].…”

Section: Dyesmentioning

confidence: 99%

Organic Semiconductor Photovoltaic Materials

Zhang

2015

Lecture Notes in Chemistry

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Organic solar cells (OSCs) are an emerging alternative photovoltaic technology and thus they have recently gained much attention. In this chapter, recent developments in organic photovoltaic materials, involving small molecule donors and non-fullerene acceptors for vacuum and solution-processed photovoltaic cells, are summarized. A general overview of the structure-property relationships of these organic photovoltaic materials and the design rules for such materials is presented. Critical factors which determined their photophysical properties such as energy levels, absorption, and carrier mobilities are also highlighted.

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“…In general, the donor–acceptor blended film is amorphous. Thus, exciton diffusion length is very small, typically, in a range of 5–20 nm for most organic semiconductors . To boost charge separation, it generally requires the blended donor and acceptor to form nanoscale aggregate domains with the phase size comparable to the exciton diffusion length, so that the excitons can efficiently reach the donor–acceptor interface via the concentration‐ingredient driving diffusion process .…”

Section: Introductionmentioning

confidence: 99%

Boosting Organic Solar Cell Electrical Performance by Introducing Large Aromatics onto Small‐Molecule Peripheral Side‐Chains

Zhang

Yao

Chen

2016

Adv Materials Inter

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It is reported herein that electrical performance of diketopyrrolopyrrole based small‐molecule solar cells are boosted via increasing the conjugation size fraction (δ) on lateral side‐chains and on the mainchain of small‐molecule donor. The conjugation size fraction is defined as δ = N p/N m, where N p is the number of five‐ or six‐member aromatic rings on the peripheral side‐chains and N m is that on the mainchain. As the DPP‐dimer's core structure varies from 5,10‐bis((5‐(2‐ethylhexyl)thiophen‐2‐yl)dithieno[2,3‐d:2′,3′‐d′]benzo[1,2‐b:4,5‐b′]dithiophene (DT‐BDT) to 4,8‐bis((5‐(2‐ethylhexyl)thiophen‐2‐yl)‐BDT (2T‐BDT), and then 4,8‐bis(5′‐(2‐ethylhexyl)‐(2,2′‐bithiophen)‐5‐yl)‐BDT (4T‐BDT), the term of δ increases from 2/13 to 2/11 and then 4/11. In the blended film with the fullerene acceptor, the donor phase size decreases from 35 to 24 and 15 nm, becoming more and more approaching to the effective exciton diffusion length. Consequently, the obtainable maximum generation rate of electron–hole bound pairs increases from 7.0 × 1027 to 7.3 × 1027 and then 7.7 × 1027 m−3 s−1. Meanwhile, reduction of donor crystallinity with the increase of δ leads to a higher effective carrier mobility, which suppresses recombination losses and leads to a larger carrier collection probability. Promotions of both charge separation and transport give a larger short‐circuit current density, a higher fill‐factor, and ultimately a larger efficiency.

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Triazatruxene‐Diketopyrrolopyrrole Dumbbell‐Shaped Molecules as Photoactive Electron Donor for High‐Efficiency Solution Processed Organic Solar Cells

Cited by 68 publications

References 32 publications

Porphyrins and BODIPY as Building Blocks for Efficient Donor Materials in Bulk Heterojunction Solar Cells

Porphyrins and BODIPY as Building Blocks for Efficient Donor Materials in Bulk Heterojunction Solar Cells

Organic Semiconductor Photovoltaic Materials

Boosting Organic Solar Cell Electrical Performance by Introducing Large Aromatics onto Small‐Molecule Peripheral Side‐Chains

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