Correlation between charge transfer exciton recombination and photocurrent in polymer/fullerene solar cells

Hallermann, Markus; Como, Enrico Da; Feldmann, Jochen; Izquierdo, Marta; Filippone, Salvatore; Martín, Nazario; Jüchter, Sabrina; Hauff, Elizabeth von

doi:10.1063/1.3462298

Cited by 50 publications

(36 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As we show from Monte-Carlo simulations in supporting material (Fig. S4-S5 [36,37]. We notice that at 5% doping P3HT displays clusters rich in dopant molecules and the information obtained from SEM is thereby confirmed (Fig.5f).…”

Section: (E-h) Show Modulations In the Plsupporting

confidence: 60%

Imaging of morphological changes and phase segregation in doped polymeric semiconductors

et al. 2015

Self Cite

View full text Add to dashboard Cite

The electrical conductivity and morphological characteristics of two conjugated polymers, P3HT and PCPDTBT, p-doped with the strong electron acceptor tetrafluorotetracyanoquinodimethane (F4-TCNQ) are studied as a function of dopant concentration. By combining scanning and transmission electron microscopy, SEM and TEM, with electrical characterisation we observe a correlation between the saturation in electrical conductivity and the formation of dopant rich clusters. We demonstrate that SEM is a useful technique to observe imaging contrast for locating doped regions in thin polymer films, while in parallel monitoring the surface morphology. The results are relevant for the understanding of structure property relationships in doped conjugated polymers.

show abstract

Section: (E-h) Show Modulations In the Plsupporting

confidence: 60%

Imaging of morphological changes and phase segregation in doped polymeric semiconductors

et al. 2015

Self Cite

View full text Add to dashboard Cite

show abstract

“…The observation of a red-shifted broad peak in blends have been reported for different combination of A and D materials and is considered a signature of radiative recombination from a CT exciton to the ground state across the D/A interface [34][35][36][37][38][39][40]. The horizontal configuration (figure 5d), consists hereof islands of DIP surrounded by a rim of PTCDI-C 8 and the vertical configuration is made out of 0.8ML of PTCDI-C 8 grown on top of 1ML of DIP (Figure 2).…”

mentioning

confidence: 75%

Influence of the Relative Molecular Orientation on Interfacial Charge-Transfer Excitons at Donor/Acceptor Nanoscale Heterojunctions

et al. 2014

View full text Add to dashboard Cite

We address the impact of the relative orientation between donor (D) and acceptor (A) molecules at the D/A heterojunction on the exciton dissociation. For this purpose, two-dimensional heterojunctions of diindenoperylene (DIP) and N,N′-dioctyl-3,4,9,10-perylene tetracarboxylicdiimide (PTCDI-C8) deposited onto SiO2/Si are grown, which exemplify two model interfaces with the π-staking direction either perpendicular or parallel to the interface. Aspects related to the morphology of the heterojunctions and charge photogeneration are studied by scanning probe force methods and photoluminescence (PL) spectroscopy. Results from PL spectroscopy indicate that the exciton dissociation is influenced by the different relative molecular orientations of A and D. For the configuration with stronger orbital overlap between A and D at the interface, the exciton dissociation is dominated by recombination from an interfacial charge-transfer state.

show abstract

“…3,4 There have been several studies about OPVs using SubPcs as donor materials. [2][3][4][5][6][7][8][9][10][11] Nevertheless, it is considered to be disadvantageous from a viewpoint of photochemical properties; that is, SubPc absorbs shorter wavelengths and affects the J sc compared with CuPc. Therefore, there have been also studies on subnaphthalocyanine (SubNc), extended compound of SubPc to have intense bathochromic-shifted absorption band.…”

mentioning

confidence: 99%

Synthesis and properties of novel fluorinated subnaphthalocyanines for organic photovoltaic cells

Takao

Masuoka

Yamamoto

et al. 2014

Tetrahedron Letters

View full text Add to dashboard Cite

Novel fluorinated subnaphthalocyanine derivatives were newly designed and synthesized as donor materials for low molecular organic photovoltaic cells using fullerene as an acceptor. They were designed to have the low-lying HOMO energy levels for improvement of open circuit voltage without any expense of short-circuit current density. The HOMO/LUMO energy levels of hexafluoro-, heptafluoro-, dodecafluoro-, tridecafluoro-and the parent subnaphthalocyanine estimated based on the photoelectron spectroscopy were-5.69/-3.93,-5.67/-3.90,-5.96/-4.19,-5.92/-4.11 and-5.30/-3.58 eV, respectively, showing that frontier orbital energy levels can be effectively tuned by fluorination.

show abstract

Correlation between charge transfer exciton recombination and photocurrent in polymer/fullerene solar cells

Cited by 50 publications

References 21 publications

Imaging of morphological changes and phase segregation in doped polymeric semiconductors

Imaging of morphological changes and phase segregation in doped polymeric semiconductors

Influence of the Relative Molecular Orientation on Interfacial Charge-Transfer Excitons at Donor/Acceptor Nanoscale Heterojunctions

Synthesis and properties of novel fluorinated subnaphthalocyanines for organic photovoltaic cells

Contact Info

Product

Resources

About