Development of low band gap molecular donors with phthalimide terminal groups for use in solution processed organic solar cells

Juan, Ronan R. San; Payne, Abby‐Jo; Welch, Gregory C.; Eftaiha, Ala’a F.

doi:10.1016/j.dyepig.2016.05.015

Cited by 13 publications

(2 citation statements)

References 53 publications

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“…Thus, the search for better electron acceptor materials continues to steer intensive research into alternative OSCs. This forms the basis for the rapidly emerging popularity of non-fullerene acceptors (NFA) which are small polymer molecules famous for their smaller bandgap (Lin and Zhan, 2014;San Juan et al, 2016). The broad array of the NFA landscape has shown their versatility in the tuning of their opto-electrical properties through molecular design.…”

Section: Hencementioning

confidence: 99%

Comparative Investigation of Fullerene PC71BM and Non-fullerene ITIC-Th Acceptors Blended With P3HT or PBDB-T Donor Polymers for PV Applications

et al. 2021

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Fundamentally, organic solar cells (OSCs) with a bulk-heterojunction active layer are made of at least two electronically dissimilar molecules, in which photoabsorption in one (donor) generates Frenkel excitons. The formation of free charge carriers emerge after exciton dissociation at the donor:acceptor interface. In the past decade, most of the progress in enhanced device performance has been steered by the rapid development of novel donor and acceptor materials and on device engineering. Among these donor materials, regioregular poly(3-hexylthiophene) (P3HT) produced better performance despite the mismatch of its absorption coefficient with the solar emission spectrum. Comparatively the donor PBDB-T exhibits an outstanding absorption coefficient with a deeper-lying highest occupied molecular orbital (HOMO) level. Previously most of the efficient acceptors were based on fullerene molecules characterized by limited photoabsorption and stability. In contrast, the recently developed non-fullerene OSCs have a tunable absorption spectrum and exhibit improved stability. In this work, we explore the fundamental sources of the differences in the device performance for different blend compositions made of fullerene derivative (PC71BM) and non-fullerene (ITIC-Th) when paired with the polymer donors P3HT and PBDB-T. The characteristic changes of the optical properties of these blends and their roles in device performance are also investigated. We also studied charge generation where PBDB-T:PC71BM showed the highest maximum exciton generation rate (Gmax) of 3.22 × 1028 s–1 while P3HT: ITIC-Th gave the lowest (0.96 × 1028 s–1). Also noted, PC71BM based counterparts gave better charge transfer capabilities as seen from the lower PL quenching and higher charge carrier dissociation plus collection probability P(E,T) derived from a plot of Jph/Jsat ratio under short-circuit conditions against the effective voltages.

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Section: Hencementioning

confidence: 99%

Comparative Investigation of Fullerene PC71BM and Non-fullerene ITIC-Th Acceptors Blended With P3HT or PBDB-T Donor Polymers for PV Applications

et al. 2021

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“…At the same time, they began to produce CIGS solar cells for power generation (40W) and the highest efficiency of 12.1% [9] . The United States Renewable Energy Laboratory prepared CIGS thin film solar cells by three-step co-evaporation method, It's conversion efficiency reached 19.9%, which is the world record of single junction thin-film solar cells [10] .…”

Section: Development Historymentioning

confidence: 99%

Research Status and Development of CuInTe<sub>2</sub> Thin Film Solar Cells

Liu

Jing

2017

MSF

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Thin film solar cell is the best alternative to replace Si solar cell, which has the advantages of low cost, no pollution and so on. It has been developing rapidly in recent years. CuInTe2 thin-film battery which is similar to CIS thin-film battery belongs to Cu-AⅢ-BVI2 sulfur compounds. The energy gap of CuInTe2 are about 1.06eV, and it is a kind of good absorbing layer material. In this paper, the research history of the CuInTe2 thin film materials is briefly introduced. It only stays at the stage of preparation and performance testing, and has not been prepared for the finished battery at present. The feasibility and advantages of CuInTe2 as photoelectric material are explained from it’s structure characteristics. The advantages and disadvantages of various methods of preparing thin film materials are analyzed and impurities in the process are found in the progress. The optical properties and electrical properties of the CuInTe2 thin-film cells can be tested without the preparation of a battery due to the complexity of thin film solar cell structure.

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Dissociative Electron Transfer to N‐(Arylthio)phthalimides: Factors Affecting the Formation and Dissociation of Radical Anions

Saley,

Hamed,

Houmam

2024

ChemElectroChem

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A series of chemically and biologically relevant N‐(arylthio)phthalimides is synthesized and its electrochemical reduction investigated. The results of the electrochemical study are analysed through application of Savéant's dissociative electron transfer theory and with the assistance of theoretical calculations. Reduction of all investigated N‐(arylthio)phthalimides leads to the corresponding radical anions, followed by the ejection of the phthalimide anion resulting from the dissociation of the N−S chemical bond. This stepwise electron transfer mechanism is evidenced by the electrochemical data which allow determination of the standard reduction potentials of all compounds. In the formation of the N‐(arylthio)phthalimide radical anions, the theoretical calculations show that the incoming electron, is hosted by the phthalimidyl group indicating a homolytic dissociation mechanism. The dissociation rate constants of the radical anions are deduced and show that upon changing the substituent from the MeO, to Me, H, F, Cl and Br the dissociation becomes faster. A good correlation with the Hammett substituent constants is also obtained. Application of Savéant's theory through determination of the associated driving force and the intrinsic barrier energies help rationalize the observed results and show that the change in the dissociation rate constant depends mainly on the standard reduction potential of the parent compounds.

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Development of low band gap molecular donors with phthalimide terminal groups for use in solution processed organic solar cells

Cited by 13 publications

References 53 publications

Comparative Investigation of Fullerene PC71BM and Non-fullerene ITIC-Th Acceptors Blended With P3HT or PBDB-T Donor Polymers for PV Applications

Comparative Investigation of Fullerene PC71BM and Non-fullerene ITIC-Th Acceptors Blended With P3HT or PBDB-T Donor Polymers for PV Applications

Research Status and Development of CuInTe<sub>2</sub> Thin Film Solar Cells

Dissociative Electron Transfer to N‐(Arylthio)phthalimides: Factors Affecting the Formation and Dissociation of Radical Anions

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