2009
DOI: 10.1016/j.solmat.2009.02.007
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Annealing effect in the sexithiophene:C70 small molecule bulk heterojunction organic photovoltaic cells

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Cited by 76 publications
(63 citation statements)
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“…The T6-C 60 interface has been studied with ultraviolet and X-ray photoelectron spectroscopy to assess Fermi level alignment and the extent of charge transfer, [32][33][34] as it constitutes a prototypical system for solar cells. [35][36][37] In addition, it has been shown that the relative weak intermolecular interactions at this interface can be exploited and controlled in order to achieve a variety complex architectures. [38][39][40] Some simulations of oligothiophenes-C 60 have been performed: equilibrium fi lms of T4 on C 60 have been simulated with atomistic molecular dynamics and their properties compared with the bulk.…”
Section: Introductionmentioning
confidence: 99%
“…The T6-C 60 interface has been studied with ultraviolet and X-ray photoelectron spectroscopy to assess Fermi level alignment and the extent of charge transfer, [32][33][34] as it constitutes a prototypical system for solar cells. [35][36][37] In addition, it has been shown that the relative weak intermolecular interactions at this interface can be exploited and controlled in order to achieve a variety complex architectures. [38][39][40] Some simulations of oligothiophenes-C 60 have been performed: equilibrium fi lms of T4 on C 60 have been simulated with atomistic molecular dynamics and their properties compared with the bulk.…”
Section: Introductionmentioning
confidence: 99%
“…However, the decrease in the V OC may be a result of energy level realignment at C6:PCBM/Al interface due to postthermal annealing, as stated by Zhao et al [20]. Sakai et al [19], also, guessed that the variation in the contact between active layer and electrode, due to postthermal annealing, probably influenced the V OC value. The decrease in FF, shown in Figure 6, is an indication of increasing series resistance, which is produced in the solar cell due to the damage in the interface between C6:PCBM active layer and Al electrode, as a result of postannealing.…”
Section: Effect Of Thermal Annealingmentioning
confidence: 97%
“…Among those few papers, there are fewer papers, which have investigated thermal annealing [19] and active layer concentration effects on solar cells based on small organic molecules. Thermal annealing is one of the most effective ways to realize high-power conversion efficiency of the organic solar cells, since it results in the improved nanoscale morphology, the increased crystallinity of active layer, and the improved contact to the electron-collecting electrode [20].…”
Section: Introductionmentioning
confidence: 99%
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“…These results are attributed to deep HOMO level (5.2 eV) and suppression of aggregated α-6T molecules. Furthermore, to enhance the power conversion efficiency, thermal annealing treatment of fullerene-rich BHJ-type devices based on α-6T and fullerene has been reported [19]. However, the effects of thermal annealing treatments on BHJ films based on small molecules remain unclear.…”
Section: Introductionmentioning
confidence: 99%