Ambipolar Behavior of a Cu(II)–Porphyrin Derivative in Ternary Organic Solar Cells

Cuesta, Virginia; Vartanian, Maida; Singh, Manish Kumar; Singhal, Rahul; Cruz, Pilar de la; Sharma, Ganesh D.; Langa, Fernando

doi:10.1002/solr.202201046

Cited by 3 publications

(1 citation statement)

References 67 publications

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“…By co-assembling p-and n-type semiconductors, we can successfully overcome this limitation [30]. This form of transport has been observed in several donor/acceptor (D-A) cocrystals [31,32]. Hence, fabricating organic cocrystals provides a feasible means of obtaining ambipolar materials; nevertheless, the preparation of these semiconductors remains a challenge owing to complex organic syntheses.…”

Section: Introductionmentioning

confidence: 99%

Ambipolar to Unipolar Conversion in C70/Ferrocene Nanosheet Field-Effect Transistors

Mahdaoui,

Hirata,

Nagaoka

et al. 2023

Nanomaterials

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Organic cocrystals, which are assembled by noncovalent intermolecular interactions, have garnered intense interest due to their remarkable chemicophysical properties and practical applications. One notable feature, namely, the charge transfer (CT) interactions within the cocrystals, not only facilitates the formation of an ordered supramolecular network but also endows them with desirable semiconductor characteristics. Here, we present the intriguing ambipolar CT properties exhibited by nanosheets composed of single cocrystals of C70/ferrocene (C70/Fc). When heated to 150 °C, the initially ambipolar monoclinic C70/Fc nanosheet-based field-effect transistors (FETs) were transformed into n-type face-centered cubic (fcc) C70 nanosheet-based FETs owing to the elimination of Fc. This thermally induced alteration in the crystal structure was accompanied by an irreversible switching of the semiconducting behavior of the device; thus, the device transitions from ambipolar to unipolar. Importantly, the C70/Fc nanosheet-based FETs were also found to be much more thermally stable than the previously reported C60/Fc nanosheet-based FETs. Furthermore, we conducted visible/near-infrared diffuse reflectance and photoemission yield spectroscopies to investigate the crucial role played by Fc in modulating the CT characteristics. This study provides valuable insights into the overall functionality of these nanosheet structures.

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Section: Introductionmentioning

confidence: 99%

Ambipolar to Unipolar Conversion in C70/Ferrocene Nanosheet Field-Effect Transistors

Mahdaoui,

Hirata,

Nagaoka

et al. 2023

Nanomaterials

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Highly Efficient and Robust Ternary All‐Polymer Solar Cells Achieved by Electro‐Active Polymer Compatibilizers

Kim,

Choi,

Jeong

et al. 2023

Advanced Energy Materials

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All‐polymer solar cells (all‐PSCs), using polymerized non‐fullerene acceptors (PNFAs), have shown promise in improving device stabilities compared to small‐molecular acceptor‐based PSCs. However, low mixing entropy between polymer donors (PDs) and PNFAs hampers the development of optimized blend morphology. Herein, this study develops efficient conjugated polymers that serve as interfacial compatibilizers between host PD and PNFA. Ternary all‐polymer blends containing the compatibilizer demonstrate improved blend morphology with strengthened interfaces, resulting in better photovoltaic properties and thermal/mechanical stabilities. In detail, the power conversion efficiency (PCE) increases from 15.4 to 17.1% upon the addition of the compatibilizer. Moreover, the devices based on the ternary blend enable good thermal stability, retaining 90% of the initial PCE after 96 h at 125 °C. Additionally, the mechanical properties are improved; the cohesive fracture energy (Gc) of 2.6 J m−2 and crack onset strain (COS) of 20.4% of the ternary blend outperform those of the binary blend (Gc = 1.1 J m−2 and COS = 16.5%). Resultingly, the stretchable PSCs based on the ternary blend exhibit an excellent PCE of 13.7% and stretchability with a strain at PCE80% of 35%.

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A unified evaluation descriptor for π-bridges applied to metalloporphyrin derivatives

Han,

Wu,

Wang

et al. 2024

Phys. Chem. Chem. Phys.

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Ambipolar Behavior of a Cu(II)–Porphyrin Derivative in Ternary Organic Solar Cells

Abstract: Research data are not shared.

Cited by 3 publications

References 67 publications

Ambipolar to Unipolar Conversion in C70/Ferrocene Nanosheet Field-Effect Transistors

Ambipolar to Unipolar Conversion in C70/Ferrocene Nanosheet Field-Effect Transistors

Highly Efficient and Robust Ternary All‐Polymer Solar Cells Achieved by Electro‐Active Polymer Compatibilizers

A unified evaluation descriptor for π-bridges applied to metalloporphyrin derivatives

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