Indacenodithiophene-based N-type conjugated polymers provide highly thermally stable ternary organic photovoltaics displaying a performance of 17.5%

Elsayed, Mohamed Hammad; Jiang, Bing‐Huang; Wang, Yipeng; Chang, Po-Yen; Chiu, Yu‐Cheng; Jeng, Ru‐Jong; Chou, Ho‐Hsiu; Chen, Chih‐Ping

doi:10.1039/d1ta00796c

Cited by 27 publications

(10 citation statements)

References 50 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Indeed, the phase separation morphology of the active layer is metastable, and the donor/acceptor in the mixed system should move spontaneously to a low activation energy state to achieve thermodynamic stability. 33 Durable OSC devices must possess strong intermolecular interactions and avoid excessive phase segregation. The DCIB-treated blends possess very strong intermolecular interactions and well-proportioned morphology, which can be obtained by the UV-Vis and miscibility results.…”

Section: Resultsmentioning

confidence: 99%

A new simple volatile solid additive triggers morphological optimization and performance stabilization in polymer solar cells

Song

et al. 2022

Sustainable Energy Fuels

View full text Add to dashboard Cite

show abstract

Section: Resultsmentioning

confidence: 99%

A new simple volatile solid additive triggers morphological optimization and performance stabilization in polymer solar cells

Song

et al. 2022

Sustainable Energy Fuels

View full text Add to dashboard Cite

show abstract

“…Therefore, polymers (both donor and acceptors) have been applied as the third component to improve the morphology stability. [ 86,133,218–222 ] Ade et al. demonstrated the introduction of a stiff polymer (PBDB‐T) to the FTAZ:IT‐M blend could inhibit the crystallization of nonfullerene IT‐M under high thermal stress, thus improving the shelf‐life stability and thermal stress tolerance.…”

Section: Morphological Stabilitymentioning

confidence: 99%

Ternary Blend Organic Solar Cells: Understanding the Morphology from Recent Progress

2022

View full text Add to dashboard Cite

layer with binary components, where the spontaneous phase separation of the electron donor (D) and electron acceptor (A) provide sufficient D/A interfaces for charge dissociation and continuous network for charge transport. [19,20] In principle, a strong absorbance with a broad absorption band of the photoactive layer is a prerequisite to maximize the harvesting of photons, thereby realizing high photocurrent of the OSC device. [21] In the early period, fullerene derivatives dominated the acceptors, which have low absorption ability, the donor materials contributed mainly to the light harvesting. However, common organic semiconductors intrinsically possess narrow absorption window (the full width at half maximum of the absorption spectrum is about 100-200 nm), which makes it very difficult to realize a broad plateau absorption coverage. [19][20][21][22] Therefore, the device performances were severely restrained to ≈12% for the fullerene-based OSCs. [23][24][25][26] Over the past few years, nonfullerene acceptors (NFAs) have witnessed rapid progress owing to their facile synthesis, easily tunable optoelectronic properties, and strong absorption even reaching the nearinfrared (NIR) region. [3] The largely extended absorption range was realized by pairing low bandgap (LBG) NFAs with the wide bandgap (WBG) polymer donors, thus significantly improving the short current density (J sc ) and PCEs. [5][6][7][8][9][10][11][12][13][14][15] However, its further improvement still remains a formidable challenge due to the almost saturated design toolbox of building blocks for brand new donor/acceptor materials and the insufficient light absorption coverage by binary blends. [27] To make the most of the vast existing pool of semiconductors with various bandgaps and overcome the absorption limitations, tandem devices and ternary blend devices were developed. Tandem OSCs improve the light absorption ability by vertical stacking multiple single-junction cells with complementary absorption. [28] By harvesting both high and low energy photons in the separated subcells, tandem OSCs are able to diminish thermalization loss of photonic energy and overcome the Shockley-Queisser (S-Q) limit. [29] The rapid progress in NFAs has boosted the PCE of tandem OSCs approaching 20%. [14] However, the fabrication of tandem OSCs involves complicated multilayer deposition with serious technical challenges, which may limit their industrialization prospect. Alternatively, the ternary blend organic solar cells (TB-OSCs) strike a good balance between light-harvesting enhancement and device fabrication simplicity by directly Ternary blend organic solar cells (TB-OSCs) incorporating multiple donor and/or acceptor materials into the active layer have emerged as a promising strategy to simultaneously improve the overall device parameters for realizing higher performances than binary devices. Whereas introducing multiple materials also results in a more complicated morphology than their binary blend counterparts. Understanding the morphology is crucially im...

show abstract

“…Transforming abundant solar energy into chemical energy is one of the most promising approaches for future energy production. The production of hydrogen (H 2 ) from water using solar energy has been studied extensively ever since the photoelectrochemical splitting of water-mediated by n-type TiO 2 was first reported by Fujishima and Honda. − The development of eco-friendly, inexpensive, and highly active visible-light-driven photocatalysts that are stable under aqueous conditions should lead to large-scale applications of H 2 generation. , In recent years, many organic polymers have been tested as photocatalysts for H 2 evolution; for example, polymeric carbon nitride, − conjugated linear polymers, − conjugated microporous polymers, − and covalent organic frameworks, and triazine frameworks , have good potential for use in terms of being inexpensive tunable structures with excellent photophysical properties. − Nevertheless, most organic semiconducting polymers are hydrophobic materials, greatly limiting their dispersibility in water; the resulting weak interactions between the photocatalysts and water molecules during the H 2 evolution reaction can inhibit the efficiency of these photocatalysts. , …”

Section: Introductionmentioning

confidence: 99%

Hydrophobic and Hydrophilic Conjugated Polymer Dots as Binary Photocatalysts for Enhanced Visible-Light-Driven Hydrogen Evolution through Förster Resonance Energy Transfer

Elsayed

Abdellah

Hung

et al. 2021

ACS Appl. Mater. Interfaces

Self Cite

View full text Add to dashboard Cite

Organic semiconducting polymers exhibited promising photocatalytic behavior for hydrogen (H 2 ) evolution, especially when prepared in the form of polymer dots (Pdots). However, the Pdot structures were formed using common nonconjugated amphiphilic polymers, which have a negative effect on charge transfer between photocatalysts and reactants and are unable to participate in the photocatalytic reaction. This study presents a new strategy for constructing binary Pdot photocatalysts by replacing the nonconjugated amphiphilic polymer typically employed in the preparation of polymer nanoparticles (Pdots) with a low-molecular-weight conjugated polyelectrolyte. The asprepared polyelectrolyte/hydrophobic polymer-based binary Pdots truly enhance the electron transfer between the Pt cocatalyst and the polymer photocatalyst with good water dispersibility. Moreover, unlike the nonconjugated amphiphilic polymer, the photophysics and mechanism of this photocatalytic system through time-correlated single-photon counting (TCSPC) and transient absorption (TA) measurements confirmed the Forster resonance energy transfer (FRET) between the polyelectrolyte as a donor and the hydrophobic polymer as an acceptor. As a result, the designated binary Pdot photocatalysts significantly enhanced the hydrogen evolution rate (HER) of 43 900 μmol g −1 h −1 (63.5 μmol h −1 , at 420 nm) for PTTPA/PFTBTA Pdots under visible-light irradiation.

show abstract

Indacenodithiophene-based N-type conjugated polymers provide highly thermally stable ternary organic photovoltaics displaying a performance of 17.5%

Abstract: In this paper we describe three indacenodithiophene-based conjugated polymers (PITIC-Ph, PITIC-Th, PITIC-ThF) that we tested as third components for PM6:Y6–based ternary organic photovoltaics (OPVs) to provide high-power conversion efficiencies (PCEs)...

Cited by 27 publications

References 50 publications

A new simple volatile solid additive triggers morphological optimization and performance stabilization in polymer solar cells

A new simple volatile solid additive triggers morphological optimization and performance stabilization in polymer solar cells

Ternary Blend Organic Solar Cells: Understanding the Morphology from Recent Progress

Hydrophobic and Hydrophilic Conjugated Polymer Dots as Binary Photocatalysts for Enhanced Visible-Light-Driven Hydrogen Evolution through Förster Resonance Energy Transfer

Contact Info

Product

Resources

About