Device stability in organic optoelectronics

Turak, Ayse

doi:10.1016/b978-0-08-102284-9.00019-x

Cited by 4 publications

(2 citation statements)

References 363 publications

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“…Figure SI-8 in the Supporting Information shows the stability of the rGO-nanoparticle stack on P3HT/PCBM, with the topography and optical characteristics unchanged over 4 months. Moisture is one of the key degradation factors for P3HT; , the rGO-like layer being able to block the direct contact of P3HT/PCBM with water during the Cu etching process is also an important criterion for its use in viable devices.…”

Section: Resultsmentioning

confidence: 99%

Universal Transfer Printing of Micelle-Templated Nanoparticles Using Plasma-Functionalized Graphene

Hui

Munir

Vuong

et al. 2020

ACS Appl. Mater. Interfaces

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Nanostructure incorporation into devices plays a key role in improving performance, yet processes for preparing two-dimensional (2D) arrays of colloidal nanoparticles tend not to be universally applicable, particularly for soft and oxygen-sensitive substrates for organic and perovskite-based electronics. Here, we show a method of transferring reverse micelle-deposited (RMD) nanoparticles (perovskite and metal oxide) on top of an organic layer, using a functionalized graphene carrier layer for transfer printing. As the technique can be applied universally to RMD nanoparticles, we used magnetic (γ-Fe 2 O 3 ) and luminescent (methylammonium lead bromide (MAPbBr 3 )) nanoparticles to validate the transfer-printing methodology. The strong photoluminescence from the MAPbBr 3 under UV illumination and high intrinsic field of the γ-Fe 2 O 3 as measured by magnetic force microscopy (MFM), coupled with Raman measurements of the graphene layer, confirm that all components survive the transfer-printing process with little loss of properties. Such an approach to introducing uniform 2D arrays of nanoparticles onto sensitive substrates opens up new avenues to tune the device interfacial properties.

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Section: Resultsmentioning

confidence: 99%

Universal Transfer Printing of Micelle-Templated Nanoparticles Using Plasma-Functionalized Graphene

Hui

Munir

Vuong

et al. 2020

ACS Appl. Mater. Interfaces

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“…Despite improvements in device PCE, long-term stability remains a central challenge to OPV commercialization. , One factor impacting long-term stability is detrimental changes in the blend morphology over time. Initially, the physically blended donor and acceptor form a kinetically trapped morphology with nanoscale domains of each pure component and, depending on the donor/acceptor pair, an additional amorphous mixed phase .…”

Section: Introductionmentioning

confidence: 99%

Fullerene-Functionalized Poly(3-hexylthiophene) Additive Stabilizes Conjugated Polymer–Fullerene Blend Morphologies

Kim

Mueller

Yang

et al. 2021

ACS Appl. Polym. Mater.

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Organic photovoltaics are again gaining traction as device power conversion efficiencies have increased substantially over the last two years. Despite these improved efficiencies, long-term device stability remains a challenge because the physical blend of an electron-donor and -acceptor in the active layer can phase-separate into larger domains over time. Copolymers that are miscible with both the donor and acceptor can stabilize the active layer blend morphology, but these additives are often tailored to match the specific donor/acceptor blend. We demonstrate herein that a single copolymer containing a conjugated poly(3-hexylthiophene) backbone and fullerene-functionalized side chains serves as a general blend stabilizer. Optical microscopy revealed that phase separation was suppressed in three different conjugated polymer/fullerene blends (PTB7, PTB7-Th, and PffBT4T-2OD with PC71BM) when annealed with the copolymer in thin films. Moreover, phase separation was suppressed in photovoltaic devices containing PffBT4T-2OD:PC71BM with the copolymer in the active layer. We also investigated factors beyond morphology that affect the initial power conversion efficiency, which was lower for devices with the copolymer. Overall, our results demonstrate that a single fullerene-functionalized poly(3-hexylthiophene) copolymer additive suppresses phase separation in multiple conjugated polymer/fullerene thin film blends as well as in a photovoltaic device.

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Cyclotriphosphazene: A Versatile Building Block for Diverse Functional Materials

Lee,

Chua,

Wang

et al. 2024

Chemistry An Asian Journal

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Cyclotriphosphazene (CP) is a cyclic inorganic compound with the chemical formula (NPCl2)3. This unique molecule consists of a six‐membered ring composed of alternating nitrogen and phosphorus atoms, each bonded to two chlorine atoms. CP exhibits remarkable versatility and significance in the realm of materials chemistry due to its easy functionalization via facile nucleophilic substitution reactions in mild conditions as well as intriguing properties of resultant final CP‐based molecules or polymers. CP has been served as an important building block for numerous functional materials. This review provides a general and broad overview of the synthesis of CP‐based small molecules through nucleophilic substitution of hexachlorocyclotriphosphazene (HCCP), and their applications, including flame retardants, liquid crystals (LC), chemosensors, electronics, biomedical materials, and lubricants, have been summarized and discussed. It would be expected that this review would offer a timely summary of various CP‐based materials and hence give an insight into further exploration of CP‐based molecules in the future.

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Device stability in organic optoelectronics

Cited by 4 publications

References 363 publications

Universal Transfer Printing of Micelle-Templated Nanoparticles Using Plasma-Functionalized Graphene

Universal Transfer Printing of Micelle-Templated Nanoparticles Using Plasma-Functionalized Graphene

Fullerene-Functionalized Poly(3-hexylthiophene) Additive Stabilizes Conjugated Polymer–Fullerene Blend Morphologies

Cyclotriphosphazene: A Versatile Building Block for Diverse Functional Materials

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