The Electronic Structure of Organic Semiconductors

doi:10.1002/9783527685172.ch1

Cited by 6 publications

(1 citation statement)

References 145 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…2017; https://www.nrel.gov/pv/assets/images/efficiency -Organic semiconductors are essentially composed of -conjugated materials and are classified into two different families: polymers and small molecules(Fig 2.13) 34. Polymers are formed from a monomeric unit which is repeated numerous times (1,000-100,000), resulting in a high molecular weight.…”

mentioning

confidence: 99%

Synthesis and optoelectronic properties of quinoidal 2,2',6,6'-tetraphenyldipyranylidene towards photovoltaic applications

Courté¹

View full text Add to dashboard Cite

Organic solar cells (OSCs) and more recently perovskite solar cells (PSCs) have attracted a great attention in the scientific field of photovoltaics due to their potential low cost, simple fabrication process and promising power conversion efficiency (PCE). With excitons photogeneration processes, the charge carrier extraction is an essential step in the good operation of photovoltaic solar cells. Interfacial layers, such as hole transporting layer are commonly used to promote the charge diffusion towards the electrodes, resulting of a higher photocurrent. Consequently, the development of novel hole transport materials (HTMs) with suitable optoelectronics properties, low-cost and simple synthetic pathway is a major ongoing research to achieve highly efficient OSCs and PSCs. In this thesis, 2,2',6,6'-tetraphenyldipyranylidene (DIPO-Ph4), a large quinoidal planar πconjugated heterocycle is presented. The synthesis and characteristics of DIPO-Ph4 are described in details, in particular the electrical characteristics which are investigated in a fieldeffect transistor configuration. A suitable HOMO level energy and good hole transport properties make DIPO-Ph4 a potential candidate to be used as an efficient hole-transporting material (HTMs) in organic or perovskite solar cells. The presented results will demonstrate that dipyranylidene core could be an excellent building block for high mobility HTMs.

show abstract

mentioning

confidence: 99%

Synthesis and optoelectronic properties of quinoidal 2,2',6,6'-tetraphenyldipyranylidene towards photovoltaic applications

Courté¹

View full text Add to dashboard Cite

show abstract

Quantifying the Excitonic Static Disorder in Organic Semiconductors

Kay

Sandberg

Zarrabi

et al. 2022

Adv Funct Materials

View full text Add to dashboard Cite

Organic semiconductors are disordered molecular solids, and as a result, their internal charge generation dynamics, charge transport dynamics, and ultimately, the performance of the optoelectronic devices they constitute, are governed by energetic disorder. This is particularly pertinent for emerging photovoltaic technology where the extractable power is directly dependent on these dynamics. To ascertain how energetic disorder impacts charge generation, exciton transport, charge transport, and the performance of organic semiconductor devices, an accurate approach is first required to measure this critical parameter. In this work, it is shown that the static disorder of an organic semiconductor can be obtained from its photovoltaic external quantum efficiency spectrum at wavelengths near the absorption onset. A detailed methodology is presented, alongside a computational framework, for quantifying the static energetic disorder associated with singlet excitons. Moreover, the authors show that minimizing the limiting effects of optical interference is crucial for achieving high‐accuracy quantifications. Finally, transparent devices are employed to estimate the excitonic static disorder in several technologically relevant organic semiconductor donor–acceptor blends, including the high‐efficiency organic photovoltaic system PM6:Y6.

show abstract

Synthesis and Optoelectronic Properties of Thiophene‐Based Semiconducting Oligomers

et al. 2016

View full text Add to dashboard Cite

Three new semiconducting oligomers (BT, TT and TT2) made of thiophene based donors, bithiazole weak acceptor and rhodanine based acceptors were designed and synthesized using Suzuki and Stille coupling. Oligomers exhibited excellent absorption in the visible region because of the π‐π* transition as well as intramolecular charge transfer between the donor and acceptor moieties. The packing of oligomers in the film state was studied using 2D grazing incidence X‐ray diffraction (GIXRD) analysis and the percentage of edge‐on orientation was found to be greater compared to face‐on orientation in all three oligomers. HOMO and LUMO energy levels of the oligomers in film state were calculated from ultraviolet photoelectron yield spectroscopy analysis and onset of absorption, respectively. Detailed time‐resolved microwave conductivity experiments proved that the oligomers can act as n‐type materials making these oligomers promising for optoelectronic device applications.

show abstract

The Electronic Structure of Organic Semiconductors

Cited by 6 publications

References 145 publications

Synthesis and optoelectronic properties of quinoidal 2,2',6,6'-tetraphenyldipyranylidene towards photovoltaic applications

Synthesis and optoelectronic properties of quinoidal 2,2',6,6'-tetraphenyldipyranylidene towards photovoltaic applications

Quantifying the Excitonic Static Disorder in Organic Semiconductors

Synthesis and Optoelectronic Properties of Thiophene‐Based Semiconducting Oligomers

Contact Info

Product

Resources

About