Molecular hybrids of CdSe semiconductor nanocrystals with terthiophene carboxylic acid or its polymeric analogue

Pokrop, Rafal; Pamuła, Katarzyna; Deja-Drogomirecka, Sylwia; Zagórska, Małgorzata; Reiß, Peter; Louarn, G.; Chandezon, F.; Proń, Adam

doi:10.1016/j.matchemphys.2010.05.054

Cited by 4 publications

(4 citation statements)

References 23 publications

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“…Raman‐SEC has been scarcely used to characterize QDs. In most cases it has been used to characterize hybrid materials, obtaining important information about the organic part of the nanomaterial. Nevertheless, Raman‐SEC should be very useful to study QDs because most of these NCs exhibit well‐defined phonons …”

Section: Advantages In Usementioning

confidence: 99%

Spectroelectrochemistry of Quantum Dots

Garoz‐Ruiz

Perales-Rondón

Heras

et al. 2019

Israel Journal of Chemistry

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Spectroelectrochemistry (SEC) is a set of techniques with many advantages in the study and characterization of materials. Although SEC has not yet been widely used to study quantum dots (QDs), the information extracted from SEC experiments about these nanostructures is very useful. Most of the works that use SEC to study QDs are high‐quality pieces of research. This review intends to show how to perform SEC in an easy way and what information can be obtained using these techniques. Most of the examples shown in this review are related to semiconductor and carbon QDs. After a brief introduction, some optoelectronic properties of QDs and the main SEC techniques are described. The capabilities of SEC for the study of QDs are illustrated with examples extracted from literature. Finally, the needs of SEC to become a user‐friendly technique and its evolution to become more powerful are commented in the last section of the review.

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Section: Advantages In Usementioning

confidence: 99%

Spectroelectrochemistry of Quantum Dots

Garoz‐Ruiz

Perales-Rondón

Heras

et al. 2019

Israel Journal of Chemistry

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“…The energy of the HOMO and LUMO levels were determined from the onset of the oxidation and reduction peaks, respectively (cf. Table 1), assuming that the energy level of the redox couple Fc þ /Fc is -5.1 eV versus vacuum [27] :…”

Section: Resultsmentioning

confidence: 99%

“…Besides the fact that the bandgap for the copolymer should be lower than for the repeating unit due to an extended delocalization of the p electron cloud in the copolymer, the values extracted from CV measurements depend on the potential of the Fc þ /Fc reference redox couple versus. vacuum [27] . We have used the value of -5.1 eV as reported in the work by Trasatti devoted to absolute reference potentials [27] .…”

Section: Dft Calculationsmentioning

confidence: 99%

“…vacuum [27] . We have used the value of -5.1 eV as reported in the work by Trasatti devoted to absolute reference potentials [27] . Taking the value of -4.8 eV as is done in a large number of papers would lift the energy levels positions of the copolymers and would therefore significantly reduce the gap with the values obtained for the repeating units from the DFT calculations.…”

Section: Dft Calculationsmentioning

confidence: 99%

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New Alternating Copolymers of 3,6‐Carbazoles and Dithienylbenzothiadiazoles: Synthesis, Characterization, and Application in Photovoltaics

Berton

Ottone

Labet

et al. 2011

Macro Chemistry & Physics

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Three new low‐bandgap copolymers containing 3,6‐linked carbazole units are synthesized and characterized using a combination of spectroscopic and electrochemical techniques and DFT calculations. The electron‐withdrawing effect of the BTD units leads to a significant decrease of the optical bandgap from 2.59 eV for PBTC to 1.81 eV for PCDTBT, whereas pendant octyl chains on the thiophene ring lead to an increase of the gap to 2.05 eV for PCDOTBT due to steric hindrance. PBTC:PCBM photovoltaic devices exhibit a PCE of 0.35% with an EQE reaching 35% in the blue region of the solar spectrum whereas PCDTBT:PCBM blends are efficient over a wider spectral range due to the lower bandgap of PCDTBT.magnified image

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